Here's an image I drew in Aseprite respecting the NES' color and palette limits. In the upper right, you can see the image in Nestopia, and in the bottom right, you can see a picture that a friend took of the image being shown on actual hardware.
NES Rom file if you want to try out the image yourself: https://www.dropbox.com/s/yj9hywe4q6q9gy7/060117%20NES%20Lumi.nes?dl=0
Aseprite's color palette for the NES is a bit off from the NES converter program I'm using, but it converts properly so that's the important part
I will be taking commissions for these soon, and they will be $45. You'll get the NES image as well to play around with
In the meantime, I'm taking icon commissions of many types, including pixel icons (at the time of writing). You can find out more info on my website https://fxsql.com/commissions.php
If you want to be aware of when I open commissions, please follow my Commission Notification Twitter: