I took the liberty today to try and mix some white into the blue. The color lightened up quite a bit actually. It wasn't greenish blue hue as suggested, it ended up identical to Brodak's sky blue which I already have and it was so close I added it to the rest of the bottle. I used a 4 oz. bottle with about 1/4" of white in the bottom and used my wooden tongue depressor to add the blue. I scooped out two stick fulls and stirred it into the white. Apparently, I think that was just a bit much of white but the fact is it mixes well and lightens it as expected.