How COLPICK works
Three things, done properly.
Find a shade
Type a RAL code (3020) or a name. Diacritics do not matter — searching for
ruzova finds Ružová. Both the name in your language and the English name are
searched, so a colour someone quoted you in English still turns up.
Compare two shades
Open a colour and tap the compare control. Two shades fill the screen side by side with no dividing line. A line between two colours creates an edge your eye reads as a difference even when there is none, so there is not one.
Keep what you are working with
Tap the heart on any shade. Favourites live on the device and appear in the home screen widget, so the colours for the job you are on are one glance away.