Read a color in hex, RGB and HSB, find colors that contrast with it, and try a whole palette on the page before you go looking for one.
Each swatch is the nearest shade of that hue which still meets the target. Click one to load it as the second color.
Copies a ready-made prompt for Claude or ChatGPT: three palettes built on those seeds, meeting the contrast this site needs, and a reply that ends with one single JSON block. Copy that block whole and paste it below to see it on the page.
A palette you paste in is only painted on this page, and only while this tab stays open. Nothing is saved: reload and it is gone, the picker on the other pages never sees it, and none of it joins the data this site keeps in your browser.