This is a recommendation to start with... it will give you nice color, but not completely blue. First set your blue channels to the max % that you want to run. Then set your white to half of that. Lastly, set your red, green and UV to half of white... maybe even a little less. So as an example: Blues - 80%, white 40% and red/green/UV - 20%. This should give you a decent starting point and you can fine tune it from there.