Tie Dye queston

[blowry]

Hi Ladies! I don't know if this is the right place for this but, I think it's going to be entertaining! Especially if I do it right! LOL

I am tie dying for the first time in many, many years! Kinda bringing back my teenage days!! (in the 70's!) Anyway...my question is this............

I am tie dying over a very light blue knit fabric. I picked up Pink and Purple Rit Dye. I went on line and it said to dye the lightest color...(untie the elastics), re-tie and die the next light color...well, purple is darker than pink and if I dye the pink (or purple) first isn't the other color I use going to cover the color I just used? I hope I explained the right...

Thanks Girls!