Validate our text/background colors for contrast

[giovaninppc]

Contrast

We got pointed out that the contrast from the secondary label color on dark mode may not have a nice contrast. So, we may need to check if there is enough contrast, even if we are using system colors and fonts.

Another alternative may be to change the font size for the default Comment view. It's also a nice opportunity to make some assertions comparing light and dark modes.

Here are some examples of the secondary label color on top of the primary background colors

dark mode	light mode

Colorblind

In the same report, we got information that some colorblind users were finding it difficult to read the accent color on top of the black background. We may need to change it as well.

We could use the new color assets to make different colors for the accent color for dark and light modes as well.