My DS is colour blind too... (red/green CB) as everyone else has said, It's very very rare for girls to have it but unfortunately it's not impossible.... all of my uncles are CB yet My DS is the only one in my family with it & I'm 1 of 6 girls.... His wasn't picked up until he was at school & when the black board came out (it was actually green) he couldn't see any thing written on it unless it was written with white chalk, red was completely impossible to see. Now that he is older, he explains it like red he see's as black (or a shade of) & green to him is brown. The op said though that Jacobs is quite severe in that red & green doesn't have to be together for him to have trouble seeing it, he can't see the colours at all even on their own. It makes me wonder if when he looks outside & everything is so alive, lush & green, It would all still look dead to him
From memory ( many years ago) i think there are different types like red/green... blue/yellow. It doesn't help his dyslexia either... they usually use the rose coloured glasses but for DS, that obviously doesn't work on him!
GL with your DD, I'm sure she is just fine & will learn the other colours in her own time, they also used shapes in the cards my son was tested on & someone colour blind would see a different shape then someone who's fine IYKWIM. So take her off to the optomitrist (sp?) & get a test done... It's bulk billed anyway, so it's easy to just pop in on your way past anyway... it wont hurt to ask!
GL!.... FWIW, I still have to pick out all the red, green, black & brown pencils or have the name of the colour written on them, yet he is fantastic at art which I have heard is VERY commen, for CB people to be brilliant artests! (wasn't one of those famous painters actually colour blind come to think of it?) either way, if she is, It's no big deal, at least you won't have to worry about her wanting to be an electrician!! She will still be able to live a VERY normal life!