1.4 Update: I haven't tested this sprite on the 1.4 update so use at your discretion!

I made a small edit to Abigail's sprite for my personal use but I figured other people could use it too.
Instead of green, the sprite now has blue eyes to match her portrait.

To install place it on Stardew Valley\Content\Characters
If you forgot to make a backup and want to revert back I also uploaded the original file.

In case you're looking for a more natural looking Abigail without the purple hair check this other cool recolor: Custom More 'Real' Abigail by Ality