Anything from about 5000k to 10000k will grow plants fine. In between those ranges is a matter of personal preference. The lower range is more yellow and the higher will have a blue tint.
What is the radiant power of your LEDs? e.g. watts/nanometers/lumensActually, my LED provide far more blue than any fluorescent bulb out there, algae growth is almost nothing, dunno if blue light encourages algae growth.