I think the color it's just a refference to Luffy's SquadCarrot confirmed as a crew member? Look at the colors. Only foreign allies are in yellow.
But Sanji and Jinbei are in it too, yet no Pudding(despite her being with Sanji most of the time) and none of them arrived with Luffy. It's definitely more than his squad.I think the color it's just a refference to Luffy's Squad