When you draw furs, don’t worry about what color it will be in the game. Draw with the blues given (or change the tints/shades, but not the hue) in the sprite sheets. Once the pattern is into the game you can change what color your character is at Alexandra (in Saliko).
Drawing with the blues given is what makes your fur dyeable. Though- if you don’t really care about being able to do that, I think you can just draw the fur you want directly onto the spirits sheets using whatever colors you want (so you don’t have to use the same blue). If you do that, you have to say in your support ticket when submitting that those are the colors you want permanently on your fur. Something like that.
I’m not sure what the transparency thing you talked about was? But drawing with blue won’t make you invisible. xD Only erasing parts of limbs would do that, which isn’t allowed anyways. When you submit the fur pattern, you make extra layers transparent/delete them. That’s the only transparency-related thing I can think of.
If I’m wrong somewhere, sorryyy. Anyways, good luck with your fur Oliver! ^-^ The reference you’re using looks nice.