Removing old green tea stains

[LaBellina]

Today decided to wear a blouse that I had worn previously somewhere last summer but just discovered some stains on a sleeve.
Tried to remove them with water and soap but it makes no difference so I suspect they were there since last time I wore it .
They’re very light green and I suspect I somehow spilled green tea on it.
I have had those stains before and they’re a real pain in the arse to remove.
I love this blouse and I’m not ready to throw it away yet, does anyone have advice on how to remove these old stains ?

Here’s a picture

Ace bleach is gentle but effective with most stains but the stains I can see on your garment look more like the dye has been bleached.

Yes it looks kind of weird @Chatanooga1.
The blue stripes don’t seem affected but the white has this strange discoloration. Wonder if green tea can cause this but it’s the first thing I thought of.

I'd recommend hanging it outside on a bright sunny day. Just make sure you peg it/lie it so that the stains are in direct sunlight.

That’s a good one! I’m going to try that after washing it. Thanks