New title bar accent color is too bright

**Describe the bug**
Since updating Lepton to fix the broken title bar accent color, I immediately noticed how bright it now appeared. Before, it matched more accurately with the color of other windows' title bars.

**Expected behavior**
Title bar color matching the appearance of previous versions, as well as other apps on the system. (Notepad used in example screenshot.)

**Screenshots**

**Environment:**
- Distribution
- [ ] [Original Lepton](https://github.com/black7375/Firefox-UI-Fix)
- [x] [Lepton's photon style](https://github.com/black7375/Firefox-UI-Fix/tree/photon-style)
- [ ] [Lepton's proton style](https://github.com/black7375/Firefox-UI-Fix/tree/proton-style)
- Firefox Version: 103.0
- OS:
- [ ] Linux
- [x] Windows
- [ ] Mac
- [ ] Other:
- Theme:
- [ ] Light
- [ ] Dark
- [ ] Alpenglow (System: Light)
- [ ] Alpenglow (System: Dark)
- [x] System Default
- [ ] Other: (e.g. [Photon Colors](https://addons.mozilla.org/en-US/firefox/addon/photon-colors/), [Google Chrome Dark](https://addons.mozilla.org/en-US/firefox/addon/google-chrome-dark/), [Fairytale Of Nature](https://addons.mozilla.org/en-US/firefox/addon/fairytale-of-nature/))

**`user.js` setup**

```javascript
// ** Theme Default Options ****************************************************
// userchrome.css usercontent.css activate
user_pref("toolkit.legacyUserProfileCustomizations.stylesheets", true);

// Proton Enabled #127 || Removed at 97 #328 (Maintained for compatibility with ESR)
user_pref("browser.proton.enabled", true);

// Proton Tooltip
user_pref("browser.proton.places-tooltip.enabled", true);

// Fill SVG Color
user_pref("svg.context-properties.content.enabled", true);

// CSS Color Mix - 88 Above
user_pref("layout.css.color-mix.enabled", true);

// CSS Blur Filter - 88 Above
user_pref("layout.css.backdrop-filter.enabled", true);

// Restore Compact Mode - 89 Above
user_pref("browser.compactmode.show", true);

// about:home Search Bar - 89 Above
user_pref("browser.newtabpage.activity-stream.improvesearch.handoffToAwesomebar", false);

// Browser Theme Based Scheme - Will be activate 95 Above
// user_pref("layout.css.prefers-color-scheme.content-override", 3);

// ** Theme Related Options ****************************************************
// == Theme Distribution Settings ==============================================
// The rows that are located continuously must be changed `true`/`false` explicitly because there is a collision.
// https://github.com/black7375/Firefox-UI-Fix/wiki/Options#important
user_pref("userChrome.tab.connect_to_window", true); // Original, Photon
user_pref("userChrome.tab.color_like_toolbar", true); // Original, Photon

user_pref("userChrome.tab.lepton_like_padding", false); // Original
user_pref("userChrome.tab.photon_like_padding", true); // Photon

user_pref("userChrome.tab.dynamic_separtor", false); // Original, Proton
user_pref("userChrome.tab.static_separator", true); // Photon
user_pref("userChrome.tab.static_separator.selected_accent", false); // Just option

user_pref("userChrome.tab.newtab_button_like_tab", false); // Original
user_pref("userChrome.tab.newtab_button_smaller", true); // Photon
user_pref("userChrome.tab.newtab_button_proton", false); // Proton

user_pref("userChrome.icon.panel_full", false); // Original, Proton
user_pref("userChrome.icon.panel_photon", true); // Photon
user_pref("userChrome.icon.panel_sparse", false); // Just option

// Original Only
user_pref("userChrome.tab.box_shadow", false);
user_pref("userChrome.tab.bottom_rounded_corner", false);

// Photon Only
user_pref("userChrome.tab.photon_like_contextline", true);
user_pref("userChrome.rounding.square_tab", true);

// == Theme Compatibility Settings =============================================
// user_pref("userChrome.compatibility.accent_color", true); // Firefox v103 Below
// user_pref("userChrome.compatibility.covered_header_image", true);
// user_pref("userChrome.compatibility.panel_cutoff", true);
// user_pref("userChrome.compatibility.navbar_top_border", true);
// user_pref("userChrome.compatibility.dynamic_separator", true); // Need dynamic_seperator

// user_pref("userChrome.compatiblity.os.linux_non_native_titlebar_button", true);
// user_pref("userChrome.compatibility.os.windows_maximized, true");

// == Theme Custom Settings ====================================================
// -- User Chrome --------------------------------------------------------------
// user_pref("userChrome.decoration.disable_panel_animate", true);
// user_pref("userChrome.decoration.disable_sidebar_animate", true);

// user_pref("userChrome.theme.proton_color.dark_blue_accent", true);

// user_pref("userChrome.rounding.square_button", true);
// user_pref("userChrome.rounding.square_panel", true);
// user_pref("userChrome.rounding.square_panelitem", true);
// user_pref("userChrome.rounding.square_menupopup", true);
// user_pref("userChrome.rounding.square_menuitem", true);
// user_pref("userChrome.rounding.square_field", true);
// user_pref("userChrome.rounding.square_checklabel", true);

// user_pref("userChrome.padding.first_tab", true);
// user_pref("userChrome.padding.drag_space", true);
// user_pref("userChrome.padding.drag_space.maximized", true);

// user_pref("userChrome.padding.menu_compact", true);
// user_pref("userChrome.padding.bookmark_menu.compact", true);
// user_pref("userChrome.padding.urlView_expanding", true);
// user_pref("userChrome.padding.urlView_result", true);
// user_pref("userChrome.padding.panel_header", true);

// user_pref("userChrome.urlView.move_icon_to_left", true);
// user_pref("userChrome.urlView.go_button_when_typing", true);
// user_pref("userChrome.urlView.always_show_page_actions", true);

// user_pref("userChrome.tab.on_bottom", true);
// user_pref("userChrome.tab.on_bottom.above_bookmark", true); // Need on_bottom
// user_pref("userChrome.tab.on_bottom.menubar_on_top", true); // Need on_bottom
// user_pref("userChrome.tab.always_show_tab_icon", true);
// user_pref("userChrome.tab.close_button_at_pinned", true);
// user_pref("userChrome.tab.close_button_at_pinned.always", true);
// user_pref("userChrome.tab.close_button_at_pinned.background", true);
// user_pref("userChrome.tab.close_button_at_hover.always", true); // Need close_button_at_hover
// user_pref("userChrome.tab.sound_show_label", true); // Need remove sound_hide_label
// user_pref("userChrome.tab.centered_label", true);

// user_pref("userChrome.panel.remove_strip", true);
// user_pref("userChrome.panel.full_width_separator", true);
// user_pref("userChrome.panel.full_width_padding", true);

// user_pref("userChrome.icon.account_image_to_right", true);
// user_pref("userChrome.icon.account_label_to_right", true);
// user_pref("userChrome.icon.menu.full", true);
// user_pref("userChrome.icon.global_menu.mac", true);

// -- User Content -------------------------------------------------------------
// user_pref("userContent.player.ui.twoline", true);

// user_pref("userContent.page.proton_color.dark_blue_accent", true);
// user_pref("userContent.page.proton_color.system_accent", true);

// == Theme Default Settings ===================================================
// -- User Chrome --------------------------------------------------------------
user_pref("userChrome.compatibility.theme", true);
user_pref("userChrome.compatibility.os", true);

user_pref("userChrome.theme.built_in_contrast", true);
user_pref("userChrome.theme.system_default", true);
user_pref("userChrome.theme.proton_color", true);
user_pref("userChrome.theme.proton_chrome", true); // Need proton_color
user_pref("userChrome.theme.fully_color", true); // Need proton_color
user_pref("userChrome.theme.fully_dark", true); // Need proton_color

user_pref("userChrome.decoration.cursor", true);
user_pref("userChrome.decoration.field_border", true);
user_pref("userChrome.decoration.download_panel", true);
user_pref("userChrome.decoration.animate", true);

user_pref("userChrome.padding.tabbar_width", true);
user_pref("userChrome.padding.tabbar_height", true);
user_pref("userChrome.padding.toolbar_button", true);
user_pref("userChrome.padding.navbar_width", true);
user_pref("userChrome.padding.urlbar", true);
user_pref("userChrome.padding.bookmarkbar", true);
user_pref("userChrome.padding.infobar", true);
user_pref("userChrome.padding.menu", true);
user_pref("userChrome.padding.bookmark_menu", true);
user_pref("userChrome.padding.global_menubar", true);
user_pref("userChrome.padding.panel", true);
user_pref("userChrome.padding.popup_panel", true);

user_pref("userChrome.tab.multi_selected", true);
user_pref("userChrome.tab.unloaded", true);
user_pref("userChrome.tab.letters_cleary", true);
user_pref("userChrome.tab.close_button_at_hover", true);
user_pref("userChrome.tab.sound_hide_label", true);
user_pref("userChrome.tab.sound_with_favicons", true);
user_pref("userChrome.tab.pip", true);
user_pref("userChrome.tab.container", true);
user_pref("userChrome.tab.crashed", true);

user_pref("userChrome.fullscreen.overlap", true);
user_pref("userChrome.fullscreen.show_bookmarkbar", true);

user_pref("userChrome.icon.library", true);
user_pref("userChrome.icon.panel", true);
user_pref("userChrome.icon.menu", true);
user_pref("userChrome.icon.context_menu", true);
user_pref("userChrome.icon.global_menu", true);
user_pref("userChrome.icon.global_menubar", true);

// -- User Content -------------------------------------------------------------
user_pref("userContent.player.ui", true);
user_pref("userContent.player.icon", true);
user_pref("userContent.player.noaudio", true);
user_pref("userContent.player.size", true);
user_pref("userContent.player.click_to_play", true);
user_pref("userContent.player.animate", true);

user_pref("userContent.newTab.field_border", true);
user_pref("userContent.newTab.full_icon", true);
user_pref("userContent.newTab.animate", true);
user_pref("userContent.newTab.pocket_to_last", true);
user_pref("userContent.newTab.searchbar", true);

user_pref("userContent.page.illustration", true);
user_pref("userContent.page.proton_color", true);
user_pref("userContent.page.dark_mode", true); // Need proton_color
user_pref("userContent.page.proton", true); // Need proton_color

// ** Useful Options ***********************************************************
// Integrated calculator at urlbar
user_pref("browser.urlbar.suggest.calculator", true);

// Integrated unit convertor at urlbar
// user_pref("browser.urlbar.unitConversion.enabled", true);

// Draw in Titlebar
// user_pref("browser.tabs.drawInTitlebar", true);
// user_pref("browser.tabs.inTitlebar", 1); // Nightly, 96 Above

// ** Scrolling Settings *******************************************************
// == Only Sharpen Scrolling ===================================================
// Pref Value Original
/*
user_pref("mousewheel.min_line_scroll_amount", 10); // 5
user_pref("general.smoothScroll.mouseWheel.durationMinMS", 80); // 50
user_pref("general.smoothScroll.currentVelocityWeighting", "0.15"); // "0.25"
user_pref("general.smoothScroll.stopDecelerationWeighting", "0.6"); // "0.4"
*/

// == Smooth Scroling ==========================================================
// ** Scrolling Options ********************************************************
// based on natural smooth scrolling v2 by aveyo
// this preset will reset couple extra variables for consistency
// Pref Value Original
/*
user_pref("apz.allow_zooming", true); /// true
user_pref("apz.force_disable_desktop_zooming_scrollbars", false); /// false
user_pref("apz.paint_skipping.enabled", true); /// true
user_pref("apz.windows.use_direct_manipulation", true); /// true
user_pref("dom.event.wheel-deltaMode-lines.always-disabled", true); /// false
user_pref("general.smoothScroll.currentVelocityWeighting", "0.12"); /// "0.25" <- 1. If scroll too slow, set to "0.15"
user_pref("general.smoothScroll.durationToIntervalRatio", 1000); /// 200
user_pref("general.smoothScroll.lines.durationMaxMS", 100); /// 150
user_pref("general.smoothScroll.lines.durationMinMS", 0); /// 150
user_pref("general.smoothScroll.mouseWheel.durationMaxMS", 100); /// 200
user_pref("general.smoothScroll.mouseWheel.durationMinMS", 0); /// 50
user_pref("general.smoothScroll.mouseWheel.migrationPercent", 100); /// 100
user_pref("general.smoothScroll.msdPhysics.continuousMotionMaxDeltaMS", 12); /// 120
user_pref("general.smoothScroll.msdPhysics.enabled", true); /// false
user_pref("general.smoothScroll.msdPhysics.motionBeginSpringConstant", 200); /// 1250
user_pref("general.smoothScroll.msdPhysics.regularSpringConstant", 200); /// 1000
user_pref("general.smoothScroll.msdPhysics.slowdownMinDeltaMS", 10); /// 12
user_pref("general.smoothScroll.msdPhysics.slowdownMinDeltaRatio", "1.20"); /// "1.3"
user_pref("general.smoothScroll.msdPhysics.slowdownSpringConstant", 1000); /// 2000
user_pref("general.smoothScroll.other.durationMaxMS", 100); /// 150
user_pref("general.smoothScroll.other.durationMinMS", 0); /// 150
user_pref("general.smoothScroll.pages.durationMaxMS", 100); /// 150
user_pref("general.smoothScroll.pages.durationMinMS", 0); /// 150
user_pref("general.smoothScroll.pixels.durationMaxMS", 100); /// 150
user_pref("general.smoothScroll.pixels.durationMinMS", 0); /// 150
user_pref("general.smoothScroll.scrollbars.durationMaxMS", 100); /// 150
user_pref("general.smoothScroll.scrollbars.durationMinMS", 0); /// 150
user_pref("general.smoothScroll.stopDecelerationWeighting", "0.6"); /// "0.4"
user_pref("layers.async-pan-zoom.enabled", true); /// true
user_pref("layout.css.scroll-behavior.spring-constant", "250.0"); /// "250.0"
user_pref("mousewheel.acceleration.factor", 3); /// 10
user_pref("mousewheel.acceleration.start", -1); /// -1
user_pref("mousewheel.default.delta_multiplier_x", 100); /// 100
user_pref("mousewheel.default.delta_multiplier_y", 100); /// 100
user_pref("mousewheel.default.delta_multiplier_z", 100); /// 100
user_pref("mousewheel.min_line_scroll_amount", 0); /// 5
user_pref("mousewheel.system_scroll_override.enabled", true); /// true <- 2. If scroll too fast, set to false
user_pref("mousewheel.system_scroll_override_on_root_content.enabled", false); /// true
user_pref("mousewheel.transaction.timeout", 1500); /// 1500
user_pref("toolkit.scrollbox.horizontalScrollDistance", 4); /// 5
user_pref("toolkit.scrollbox.verticalScrollDistance", 3); /// 3
*/

```

**Additional context**
I make use of the "Aero Lite" style in my Windows theme. Firefox's design is typically unaffected by this, but I figured I could mention it here.

Reproduce the issue on Windows with Firefox 103, the photon style, and the shown user.js settings; compare the title bar with Notepad and the supplied screenshot. Trace the photon-style title-bar accent rules and verify that the resulting color matches previous versions and other system windows.

Written by the indexing model from the issue text.