Encycolorpedia.com does GW to Vallejo matches and gives you both the hex code and a little swatch on the screen along with the deltaE. Source: 11 months ago

Really, since you have no idea what the base pigments are in any color you want, I would refer to my original suggestion. If that isn't enough, then try thinning with a matching medium and then use the wet palette. You can also add a flow aid, but I would suggest a retarder, so the paint dries slightly slower on the model. That may help achieve more of a contrast effect as well. Lastly, if you aren't getting the... Source: 11 months ago

Https://encycolorpedia.com/ should do the trick. Source: about 1 year ago

Https://encycolorpedia.com/ is insanely useful not only does it tell you the hex and break down the color composition also if you have a color you like it’ll tell you the closest paint you can buy including citadel paints if there is one. Source: about 1 year ago

PaintRack on Android is the best (and worth upgrading to premium), but I should also mention https://encycolorpedia.com/ because you can use it to paint your house :). Source: about 1 year ago

Spotify isn't doing anything unique here, and it's not really a marketing campaign to explain away their UI. It's more of a showcase for hiring professionals, developers/designers/etc. Facebook has a similar one -> https://design.facebook.com/. Source: almost 3 years ago

Also, read anything published by Design @ Facebook. Source: about 3 years ago