Very tiny omission in chicken colour sheet

If you've asked for August's free chicken and I've already sent it to you, I will have sent you a colour sheet with a TINY omission in it. There are 25 colours in the design, not 24, and colour 25 (Emerald green) is the border of the chicken's eye

I'm very sorry about this – the problem is that I keep fiddling with these designs right up to the last minute, and this time I forgot to change the colour sheet to go along with the design. But it won't make any difference to the way the chicken stitches out, and I expect you will have already figured out what that mysterious last colour is