Fix #2550 - Make it easier to find Colour names

[Taffer]

This makes it easier (hopefully) to find pygame.Color()'s ability to use named colours, and also provides a page listing each, with a sample colour swatch.

Tested with Sphinx 3.5.3 and Firefox 87.0.

This addresses #2550.

[Starbuck5]

Cool work on the color swatches page, that's great!

I think it would be best to keep color.rst more similar to how it was, with the named color being one of the possible color formats under Supported color_value formats like every other format.

That being said, you could replace the link to the colordict source code with the link to your color swatches page.

I think it would also be nice to have a link to the color swatches page in the colordict source code and vice versa, so that any future editors to those files remember the existence of the other.

Also: the mystery in this PR is why the new page doesn't show up in the pygame documentation top of the page header, because new files are added to that automatically... Something in the format?

Note to anyone building the documentation (illume) This page seems to need sphinx 3 and up to date docutils (more than other pages), although I haven't tested it intensively.

[Starbuck5]

Ah, sorry I was unclear. I was happy that this doesn't show up in the top bar, I just wondered why. Since I've dabbled in hiding modules before, like in #2511.

I'd also like to have the link to pygame/pygame/blob/master be changed to pygame/pygame/blob/main since we switched default branch naming.

[Starbuck5]

Cool! Hopefully this will be helpful to people.

[Starbuck5]

On second look, I see some colors are incorrect.

For example all the golds are just black, same as all the darkoranges, and the greens, for example.

[Taffer]

On second look, I see some colors are incorrect.

For example all the golds are just black, same as all the darkoranges, and the greens, for example.

That's extremely weird, since Python wrote most of the file; I'll look into it though! Which browser are you using?

Looks like a bunch of things are showing up black (cyan starts a block of them). Inspecting the element suggests the CSS is mucked up, so I'll verify it against the colordict values.

[Starbuck5]

I'm using Chrome, but I don't think it would matter?

The one's that I'm talking about, on examination of the rst file, only have background-color: missing the color that most other ones have.

[Taffer]

The issue was incorrectly translating colours with values less than 16 in one or more components; a lot of colours were affected. I inspected the entire rendered page and everything looks good now.

[illume]

Fun :) Thanks.