You’re right, that pastel blue is flirting with the 4.5:1 minimum for body text and 3:1 for large text. Even a slight shift can make a difference. Maybe bump the hue a touch or raise the saturation until the hex gives you at least 4.6:1 against white. Alternatively, use the complementary dark gray for hover states to give a little visual weight. That way the button stays soft but still readable. If you need exact contrast ratios, I can run a quick audit on the current palette.