Contrast
SC 1.4.3 - What does "Contrast (Minimum)" mean?
Light grey text on a white background looks calm and modern. Put a bit of sunlight on the screen and it is gone. For visitors with reduced vision it is not gone occasionally, it is gone always. That is why WCAG says: text needs enough contrast with its background.
Can AI see that your text is too light?
Can AI see that your text is too light? Green on white. Orange on white. Light gray on white. It looks fresh. Colorful. Modern.