(Saltha is a lizardfolk desert country)
I'm not sure exactly about styles of fashion in Saltha in terms of trends, pre-war with the humans.
Children don't really wear clothing until they are 10, unless they are doing chores (in which case they wear the simple Aki, a loin cloth that's used by adults as underwear.
Adults, both males and females generally wear a skirt around their waist called a Lirsaki and go without anything covering their chests (no, female Salthans do not have breasts like in The Elder Scrolls).
Some wear longer skirts, or long sleeveless robes with a long sleeve shirt underneath (and possibly a vest over the robe)
After the meeting with humans, "Dantse" a modified version of pants with a hole in the back for a tail (and a draw string that ties over the tail to keep it up) became popular.( Also the shorter form "Shortse").
Betrothed Salthans wear a cloth (Littoshu) wrapped over their belt to show they are engaged.
It's not too uncommon to see the rich flaunt their wealth with a version of the Lirsak (called the Figadathese)i with a strip of cloth with a neck-hole, barely covering their chest, but shows off an excess use of fabric. Large hats of expensive fabric and ornate materials (rare feathers) are also common among the rich (and practical, providing shade)
The colors Red, White,Yellow, Blue and light grey are associated with the five divines (in order, Rela, Kai, Laikei, Gikar and Kakela), and are usually worn by priests of those respective divines.
Dark Grey is also associated with death and morning (the color of ash).
Purple is associated with royalty, a color that'll get you the stink-eye (or even beat up or killed!) for wearing after the rebellion
I like the idea of Salthan military having uniforms, but I haven't figured out what that looks like yet. For now it's just regular clothing (the sleeveless robe + longsleeve shirt)
Imgur gallery of art showing Salthan clothing:
https://imgur.com/a/k5O13