Are you a developer? Do you work on colors often? Strawberry Colors lists of all the colors available in Windows 10, so that you don't have to look in the tiny Window of Visual Studio or any other IDE.
You can choose any color, as well as fine tune the brightness of the color. All done?! Now just copy the HEX string and use anywhere you want!
If you want to save for later, hit the 'create' button! Themes sync between devices too!