With legs for each on the three hues, an RGB LED could have a fourth leg, for anode or cathode. When thinking about an RGB LED, you must facial area it so the 2nd leg through the still left is the longest. They must then be in the subsequent get: https://bricmagazine.co.uk/everything-you-need-to-know-about-led-strip-lights-to-illuminate-your-space/