Doc bug: Link color of types in docstrings is an inactive color instead of matching signatures

[pushfoo]

Bug Report

This is a teething issue for the new theme customization on the tip of development.

Actual behavior:

Type reference links are rendered as gray instead of matching the blue used for types in signatures.

Live Example:

The SpriteList here is gray:

Second local example:

str is a gray color, which looks inactive / unclickable:

Expected behavior:

str uses the same color as Any and bool in the signature.

Note that type cross-reference links matched color with the signatures on the 2.6 doc:

For evidence:

1. Got to https://api.arcade.academy/en/latest/api/sprites.html#arcade-sprite
2. Scroll down to the texture field as in the image

Steps to reproduce/example code:

1. Go to https://api.arcade.academy/en/development/api_docs/api/sprites.html#arcade.Sprite
2. Look at the top-level docstring
3. Hover over the SpriteList link here:
   
4. Observe that it is indeed a clickable type reference link
5. Move the mouse to the lower right-hand corner to the dark / light toggle here:
   
6. Observe the color is still gray: