Absolutely! It’s not just blind cyclists who benefit from a better UI. People who have less than perfect vision of any type will. Shortsighted, colour impaired etc.
I think Zwift should at least apply WCAG A and AA standards to their UI. Although it’s not a website or a public service, we deserve something that works for all subscribers.
I was riding with D. Diesel today, and I really struggle to see the distance on the “he’s behind you” marker:
White on yellow/yellow on white are terrible for contrast ratios. From my position on the saddle, I can’t read the “12m”. If I lean in and squint I can make it out, but this would be much easier to read:
Similarly these:
Yes, eventually you learn that “a green blob” is B and “a blue blob” is C. But in terms of reading the UI it’s awful. Make the letters readable from distance (by increasing size, contrast or both) or just go with a coloured spot. A green spot without the white letter is more visibly a green spot than a blurry green/white one.