The short answer if you are looking for the 1890s Portuguese is Eureka do a very small range of metropolitan infantry in slouch hat.
a longer answer on uniforms using my Peter Abbot book on colonial African armies is
Metropolitan units official uniform
pre 1892 - Brown uniforms and pickelhaube
post 1892 - Single breasted blue uniform scarlet/crimson facings for infantry and black/light blue for cacadores. Blue Kepi with white cover in the field. Light blue trousers with piping and black boots. equipment in black leather. A fatigure outfit in white brim was also supplied and frequently worn in the colonies. greatcoats could be worn bandolier fashion.
post 1895 - as above but grey felt slouch hats become common head dress (in Mozambique at least). A blue flannel blusa and blue grey breeches was common among cavalry in southern Mozambique
post 1900 - officers could wear khaki drill uniforms with sun helmets and troops revert to kepi and haverlock.
local indigena troops
Could look a lot less uniform the book has a picture of one that looks like a foundry Askari wearing a kepi and another in a uniform similar to the metropolitan troops but with knee length trousers and no shoes.
I made a couple of indigena troops for 1870s-1880s Mozambique using a foundry Askari and a Perry miniatures Paraguayan infantryman with Perry ACW coloured soldiers heads in kepi something similar in white uniform should work for the 1890s.

