I am sure the devs would love to make grenades just for you KrO, designed and made just for you, made of the material you want, the textures, everything. Maybe they'll even let you pick the colors as well. I would suggest a nice Avocado Green or maybe something a bit more warm like Firetruck Red. Here is a list of colors that may help you find the right one you are looking for KrO:
Hopefully the devs will take every other suggestion that KrO has into consideration and design the game strictly on what KrO thinks would fit his nade spammy playstyle best. you posted in the wrong section as well.