How to understand hexadecimal colors?

Answer 1

Hex color codes start with a pound sign or hashtag (#) and are followed by six letters and/or numbers. The first two letters/numbers refer to red, the next two refer to green, and the last two refer to blue. The color values are defined in values between 00 and FF (instead of from 0 to 255 in RGB).

Answer 2

You can just use a colorpicker in Google which show u a hex color