Phase, but with grey

Hello,

Apologies, this is more of a discussion than an issue but I didn't know where else to ask.

tl;dr: Would it be meaningful to create a version of the phase colormap that goes through the appropriate grey at the center of the scale?

Rationale: I work a lot with complex valued data. I find it useful to plot this using the phase colormap or similar to represent the phase, and then scale the intensity/luminance by the magnitude of my data. However, my field is used to looking at greyscale magnitude images only. Hence I've long wondered if the two couldn't be combined, whereby positive real values would still use greyscale, and then any data that has non-zero phase would have the hue shifted. As the phase colormap has a flat lightness value, couldn't the central blue-ish color be swapped out for grey? I suspect I'm forgetting some color theory as to why this is a bad idea. Thanks for any insights anyone can provide.

首先审查现有的相位色图，以及 issue 中关于如何映射复值数据、色相、幅值和灰色的问题。确定以灰色为中心的变体是否有意义，并记录一份明确的提案或结论；issue 未指明文件或测试。