I don't understand the desire for LED kits.
Just buy a load of cool, sunlight and warm white comets and chuck em in. I've never felt a need to colour match, when I've tried it's washed out the inserts.
Whoever makes the kits has their own preference. It's cheaper just to get whites of different tones which can compliment the inserts without overdoing it (eg, cool white under blue, warm white under red etc).
The manual usually tells you which inserts are wedges or bayonets so if you want to be exact it doesn't take time to get a rough amount and then round up so you can experiment or cover any you may have missed.