You can try commit to the "orc" theming more, maybe in culture, characterization... and most definitely with their designs. Not saying the art looks bad, but there's not much visual traits that tell you that "they're orcs" outside of LotR and WoW inspired knife ears and half-way green skin.
Not saying that they necessarily requires a lot to stand out, in fact, some of my favorite goblin and orc girls have very little difference with their home series' "human" race; from having a horn or a different nose, to having essentially the same peach skintone, I'm not picky about my orcs and gobbles.
But at the moment, they look like friggin' Simpsons. In my opinion, either you go green or go home, I'm not really a fan of this yellow-ish color scheme. Of course, there are medias with yellow orcs in 'em, but typically they're balanced with other colors so they don't look brighter than a traffic cone.
tldr; the color scheme's too pastel when the overall shading and shadows are comparably darker in tone