I see it on the first test but the invert makes me wonder because it's lighter (white) not orangeish.
Besides I can't trust a blue dye test period.
According to blue dye tests I should be about 2 months pregnant, I got all panicked and thought I had a BFP awhile back. I even told 2 people I just got a faint BFP! Thanks to my obsessive testing the following 6 tests confirmed my blue test was lying to me.
*grrr*
Good luck. I'd definatly say try a pink one before you spread the word.