Don’t feel guilty! Just use more bluish colors. Deuteranopes and protanopes can see blue hues very well.
If you want to be sure about the color perception of certain hues you might use these images as a hint for a color palette that works well for your next paintings:

http://www.visibone.com/colorblind/

Don’t forget that color deficient people see colors! They only have smaller color “palettes”.

I’m not colour blind, but I have a friend who is. He says red and green look alike to him, but his favourite colour is green, and he says red just looks like a darker green, but he doesn’t like it.

I like drawing pretty colourful paintings for him, but then yesterday I put some of my drawings through this colour blindness simulator thing I found on the website, and now I feel quite horrid. I don’t think he can see the colours. And I wonder how he feels about it. I’ve stopped drawing for him now.

I feel guilty…I don’t know, should I be? He seems to like them….

Oh, the LEDs on the router in your picture look greenish-yellow to me. :)

I’d rather tend to agree to your wife and describe the color as a yellowish green. But it’s not easy saying that from a photo, as the real LED most certainly looks different.
It’s not surprising that your child said it’s yellow because these LEDs often have colors that are not very near to those described as unique hues (colors that appear not as a mixture of two others). I don’t understand why they don’t just use double coding of the status, like red for peopl with normal color vision and blinking in short intervals for color deficient people. Yellow(-ish green) and blinking at long intervals etc. That’s how my WLAN router works. Each status has a unique “morse” code pattern. The solution is so simple.