iA + jB + kC LEDs= ? color?

This is an odd one. Most people here deal with single or multiple white LEDs. I have a project where I want to mix different numbers of white, blue, and royal blue. Is there anyway to predict the resulting color coordinates or effective kelvin temperature?

Check the bin code for your whites to give you their approximate locations on the CiE diagram. Then add a point for your blues (470nm) and royal blues (around 455nm). IF you want to *measure* their chromaticity, you'd need access to instrumentation -- a spectrometer, at least. The resulting triangle shows you the total gamut of your setup.

Now add in the blackbody curve, and where that curve intersects with your triangle, is the "real-world" Kelvin color temperature outputs available from your setup.

Given that white LED's are usually on the bluish side already, I don't see much of a role for the blue LED's you have, assuming your goal is to stick to real-world Kelvin colors...

Interesting...