What resistors would use for a SMD RGB LED?
The LED has 6 pins

3 ground
1 red (2.0-2.3v) 20ma
1 blue (3.0-3.4v) 20ma
1 green (3.0-3.4v) 20ma

Each color is rated at 20 milli-amps

 

Of course it depends on the supply voltage.

What is your intended power supply voltage?

 

Welcome to AAC!

\( \small R = \frac{V_{supply} - V_{LED}}{I} \)

 

Hello,

Have a look at the posts 2 and 3 of the following thread:
http://forum.allaboutcircuits.com/threads/leds-555s-flashers-and-light-chasers.19075/

Bertus

 

What resistors would use for a SMD RGB LED?
The LED has 6 pins

3 ground
1 red (2.0-2.3v) 20ma
1 blue (3.0-3.4v) 20ma
1 green (3.0-3.4v) 20ma

Each color is rated at 20 milli-amps

That does not mean you MUST run them at 20 mA. Get the LED, adapt it to a breadboard and try different resistor values and see what effect it has. It would be difficult to theorize what color you would get.