Dimension RGB LED for peak current
The 100mA/10% duty cycle is absolute maximum rating at 25°C ambient temperature. It is not something you should be designing to, and note that it only gives you 10mA average current per LED. It should be derated significantly (let's say 30%, 40% or more) to allow for ambient greater than 25°C and to avoid the absolute maximum limit. At 40% derating, you can estimate by simply extrapolating the curves. Straight line extrapolation will be a bit pessimistic, so maybe use a French curve (I'm sure you can download the shape and cut it out if you don't have one in your desk drawer). 

Note carefully: This part uses really small (and therefore cheap) LED dies, as evidenced by the rather large forward voltages at moderate currents. Compare other LEDs from suppliers with full datasheets to see the differences (below is an Avago curve for a similar 472nm (blue) LED). 

Thus, it's not really that suitable for multiplexed use unless you don't need a lot of brightness. With static drive you can get tens of mA reliably, with 11% duty cycle, maybe 7 or 8mA average safely. 

It has been suggested that you try to characterize samples yourself, if you try to do that you MUST pulse the current both to keep from frying the LED and to avoid the effects of the temperature coefficient of the LED die. 

Avago blue LED: