2 indistinguishable text background colors

I often use the reddish background colors for texts and noticed something about two of them. The pink and the purple one look different in the color picker, but when used, they both look the same in the text.
I tried to insert some images in here in order to prove it, but unfortunately the upload feature is constantly producing error messages.

Do you mean this:

The colours are slightly different, but admittedly quite similar.

Yes, you are right, those are the two colors. At first glance, I couldn’t even see a difference when having both colors next to each other without spacing in between them. But I have to admit, when you look at an upscaled image, there is a tiny difference. It might be also my monitor, which is a bit bad with light colors.
I am sorry for bothering you.