`plotly.colors.validate_colors` fails for valid colors and passes for invalid colors

This function raises a PlotlyError for color formats that are valid within traces, but also does not raise errors for color formats that are not valid.

Example of a valid color string that does not pass: color = 'hsl(290, 100%, 50%)'. This works perfectly fine if you construct a trace with it, but fails the validation test because it does not contain "rgb" or "#".

import plotly.graph_objects as go
import plotly.colors as pc

color = 'hsl(290, 100%, 50%)'

# this works
trace = go.Scatter(x=[0], y=[0], marker=dict(color=color))
fig = go.Figure(trace)
fig.show()

# this does not
pc.validate_colors(color)  # this throws an error

Other cases:

• A valid, named color string throws an error
• The same named color within a list does not throw an error
• An invalid named color within a list does not throw an error, but it should

Examples below

import plotly.colors as pc

pc.validate_colors('red')  # throws PlotlyError

pc.validate_colors(['red'])
>>> ['red']

pc.validate_colors(['asdflkjlaskdg'])
>>> ['asdflkjlaskdg']

Perhaps this function is not meant to be used in this way? If so then more information in the docstrings could be helpful.

Plotly version 5.24.1.

从 plotly.colors.validate_colors 入口开始，复现 issue 中的 HSL、named-color、valid-list 和 invalid-list 示例。跟踪标量输入和列表输入的验证方式。当支持 trace 的有效颜色能够被接受、无效颜色能够被一致地拒绝，并且函数的预期用法在文档中清晰明确时，即视为完成。