Client: Perfect! The homepage looks exactly as I wanted. Just the background image. Why did you make it such a bland color?

Me: Um… Actually it’s the same image we chose together, and the colors look quite vivid to me. Are you looking at the website from your laptop?

He had a very, VERY old laptop, with a couple of inches of dirt on the screen.

Client: Yes, but I’m sure most people have the same laptop as me. It looks good for you because you’re a designer and you have a super-PC!

Me: I can assure you that my PC isn’t special. it’s pretty normal and quite old. Also, I’m just checking it on a tablet and the color looks good.

Client: Can you make it more rich and bright?

Me: I could, but then it would look good for you, but horrible for everyone else.

Trying to show my point, I raised brightness and saturation ridiculously.

Me: See? Now it looks good for you, but here’s how it looks on my screen, as well as any other screen.

Client: Perfect! Much better! 

Me: …

He kept the full-saturation image and was SO happy.