If you want a fairly light shade you can dilute the U-Beaut dyes quite a lot and still get quite impressive results....
My ES-1TL build was done using concentrations of 100 drops into 75ml of ambient temp water on both the Blue and Green coats.
On my RCM-4F build the Purple is 25 drops of Blue and 50 drops of Red in 75ml of water mix, Then after sanding the Pink wash later was 40 drops of Red into 75ml of water.
I only use higher concentrations on the Red dye as thinner concentrations tend to come out Pink, and with Black which becomes Grey. All the other colours just go lighter/paler when thinned with water.