Look at the Laws of UX https://lawsofux.com/en/ , its great information for what you trying to do. Source: over 1 year ago

Similar to Growth's psychology section, here's another great set of principles to learn and keep in your back pocket: Https://lawsofux.com/en/. Source: over 1 year ago

Have a look through Laws of UX. Although I couldn’t find one for your situation quickly scanning the list, it’s a good resource for when you need to derive decisions from principles/“laws”. Source: over 1 year ago

With UIDs, I find them to be primarily aesthically minded - they have some knowledge of the laws of UX a lot of the time by accident through the virtue of applying design best practice, they usually display strong brand awareness, understand the importance of cohesive visual design across the whole platform but are equally comfortable deep diving into the low level detail and know the technical limitations of the... Source: almost 2 years ago

Study Basic Knowledge: Laws of UX, Usability Heuristics. Source: almost 2 years ago

You can check it out on https://epicruler.com. Source: about 2 years ago

For EpicRuler I'm using this code to get the luminance of a pixel, which I think could be used in your case too, you just have to convert the RGB part to HEX:. Source: about 2 years ago