Not suggesting this as a perfect alternative, but you could use Stylish to change the header color. Since I already have stylish installed on my chrome it only took about five seconds to open it and add a style rule like
It's got some interesting design decisions for what's potentially a cool classroom tool. If it appeals to girls that's great, but I'd have to hope it wouldn't actually repel the boys.
I don't know who I've offended but I hope it wasn't the developers. I genuinely think this is very cool, and if I can get my boss on board I will try using it in my class.
Probably the sexist nonsense about pink appealing to girls and scaring off "the boys"?
I think it is disgusting that you throw around accusations of sexism without foundation. I acknowledged ideas that children tend to have concerning sexual identity (as the designer of Ellie will have done, as anybody who wishes to address the issue of diversity in computing will have to do). I can assure you I played no part in inculcating them.