Today i was working on the other side and relaised that every frog in Australia had invaded my work

On the brickwork that is on the finished side, one of the shades is very wrong.
I got the symbol that is v mixed up with the symbol that is a tick.

v is a very light peach and I have used the tick colour which is the darker shade of brown you can see in the brick work.
I have done the other side, not all of it finished though, correctly.
The thing is, i had a look at the back and to unpick that mistake it means taking snips close up to the fabric as that was one of the first colours i did so it has stitches on the back carried over them.
I shall finish it correctly, but do you think I should unpick it? Risk it?
There is so much colour that I didn''t even notice anyway...of course, now I know it''s wrong it''s playing on my mind.

edit..i have not done the outline yet so my brickwork doesn''t look like bricks at the moment.