Colored Armor

There are 2 ways of adding colored armor

Using minecraft/text colors

items:
    helmet:
        id: LEATHER_HELMET
        slot: "helmet"
        color: "red"
        hide_attributes: true
        hide_enchants: true
        itemflags:
        - "unbreakable"
        - "self-drops"
        - "death-drops"
        - "overwrite"

color <- you can type any color thats valid (example: yellow, red, orange, black, white, green, blue)

Using RGB colors

items:
    helmet:
        id: LEATHER_HELMET
        slot: "helmet"
        rgb:
            red: 234
            green: 237
            blue: 184
        hide_attributes: true
        hide_enchants: true
        itemflags:
        - "unbreakable"
        - "self-drops"
        - "death-drops"
        - "overwrite"

most of the times you will see rgb colors displayed as rgb(red, green, blue), you will have to just put in the rgb colors in the list like done in the example