[A11Y] Color pallet doesn't have enough contrast

[Steve0Greatness]

Accent color to text color: test results, (other way around)

Orange and white do not work well as accessible colors when together. A better color match for all use case of orange and black.

However, I don't think this would work well for the category toolbar nor as the background color of the emojis once selected; I'd suggest using black in-place of orange in these cases.

Here's what the page would look like if such changes were to be implemented: