Thanks for the replay.
Well my project is quite basic but not easy to write it down in english (My first lang is swedish).
I have 15 RGB LED and is two group with 7 in each group and one alone. I also have a group of 7 white LED.
So in a group I connect each LED color to another LED color.
Digital 1 = turn group 1 to RED
Digital 2 = turn group 1 to GREEN
Digital 3 = turn group 1 to BLUE
Digital 4 = turn group 2 to RED
Digital 5 = turn group 2 to GREEN
Digital 6 = turn group 2 to BLUE
Digital 7 = turn single RGB LED to RED
Digital 8 = turn single RGB LED to GREEN
Digital 9 = turn single RGB LED to BLUE
Digital 10 = turn Group 3 LED WHITE
I guess the only that does not need any relay or something is the single RGB LED but the other have to have something.
I hope I make it a little easy to understand what I going to do.
I have work with Arduino and LED before but not so many :)