Cheating color

Notice the slight color change?

Cheating color is an oldie, but goldie I've been using for years: https://24ways.org/2006/cheating-color/

Colorable is another favorite, which I tend to use on every project to check color contrast: https://colorable.jxnblk.com/139ac0/ffffff

Edit: the label in the second swatch should read "Link", not "Link hover" :)