I'm sorry, Fee. I never knew. I would never have known, from your work, had you not mentioned it on your other submission.

In your simulation, the sun is yellow, which to me is normal, versus green in the original.
The ring the Penguin is on is blue and yellow in the simulation, versus a pinkish and green leaves in the original.
The 'waves' below the ring are more purple and violet in the original, and more blue in the simulation. The same applies for the sky in the drawings, also.
It's funny, the bill and feet in the original have more red, which you apparently can't detect, and actually would be a 'normal' orange color, but they are a muted yellow, almost a dirty yellow in the simulation.

Again, sweetie, I didn't know you had this problem, and I would have never known had you not said it, but it makes me more proud of you and amazed at what you do.

Pets the puppy! Good Girl!

Editing this comment because I didn't understand before

but now I do

This is very, very interesting. So the right is how you see the left?

Pretty much, I can see there's some minor differences so it's not an exact simulation of my colour vision, but i'd struggle to tell them apart.

...
The right one looks more correct to me...^_^;

In the original image, some of the water is purple and the sun green...
In the one on the right, the sun is nice and yellow and all the water is blue.
The formerly purple float is blue now and kind of matches the water, but the sun is the right color so ...

I don't know where you keep pulling that green color from you used for the sun.
Actually, it's interesting, I often see you use that same green color for belt buckles, door handles, earrings...
I'd probably just put a big sticker over that crayon in the box and label it "grass color"... ^_^;