I have a mix up! Big Fail

I have started an big kit of latch hook, a horse.  I ended to mix up two colours, so I have one colour that I will not have enough of.
Here are the two colours that I swapped:

I have purchased a yarn that will replace the one that I will be missing shortly.  It is not the exact colour but I think it will be an arduous search to find the exact one.

Here what I have made until now:

Here is the pattern for the horse:

 I have bought another kit of the same with the intention of doing it again but doing it right.