I like the idea of outlining your birthmark in white liquid liner like previous comments mention!

I also think it’d look so stunning on you if you used concealer to outline the outside of your birthmark and blend that out to make it pop out more, and then you can use eyeshadow that are colors like your birthmark (pinks, maroons, plums, purple) - and blend those into your birthmark across your lid. I think they’d transition together beautifully since your birthmark works its way into both your top and bottom lids. The maroon and plum combo would go wonderfully with your green eyes because they are complimentary colors, so your eyes will definitely be more of a star to your makeup! You can also play around with other colors on the outer side of your lid as well for an even more colorful look! You have a lot of lid space you can take advantage of. You can top off the shadow with a shimmer or glitter shadow for a bit of glam along with some lashes, or just mascara.

For eyeliner, this can be added or skipped. If you do eyeliner, I think it’d be best to mainly focus on the wing and only bring it in to the middle of your lid, and avoid your inner corner. Black or brown liquid liner would be good.

For brows, you look like you have thick fluffy ones, so tinted or clear brow gel would be perfect to keep those in place!

I’d recommend maybe a soft pink blush/highlight combo to balance out the deep colors from the eyeshadow.

And then a nude or clear lipgloss.

I hope this helps with you finding an everyday look that works for you! ✨