Have found a bit more info about the uniforms for Zuniga and Mancheno. This is from the regimental returns from 1701 but may well have been the same as worn previously.
Zuniga
Grey-white coat, blue cuffs, veste, stockings and breeches. White neckcloth and hat lace and tin buttons. Sergeants had silver lace on the cuffs and hat. Officers the same as the men but with a red sash and silver lace. The drummers uniform was a red coat with blue cuffs, veste, breeches and stockings and white lace.
Mancheno
Grey coat, red cuffs, veste and stockings. Grey breeches and white metal buttons. Sergeants had silver lace on the cuffs and hat. Officers had the same uniform but with gilt buttons and hat lace.
Has been fun trying to find info on the Spanish uniforms but there seems to be some contradictions in the information so it's a case of doing the one you like best