<Astralweaver>
<append xpath="/item_modifiers" >
<item_modifier name="Dye: Sunset" installable_tags="clothing,armor,weapon,tool,vehicle" modifier_tags="dye" type="attachment" rarity="0.2">
<property name="DescriptionKey" value="modDyeGroupDesc"/>
<property name="Stacknumber" value="1"/>
<property name="CustomIcon" value="modDyeBlack"/>
<property name="CustomIconTint" value="251,157,50"/>
<item_property_overrides name="*">
<property name="TintColor" value="251,157,50"/>
<property name="CustomIconTint" value="251,157,50"/>
<property name="UMA.Overlay0Tint" value="251,157,50"/>
</item_property_overrides>
<item_property_overrides name="apparelTankTop">
<property name="UMA.Overlay0Tint" value="skin"/>
<property name="UMA.Overlay1Tint" value="251,157,50"/>
</item_property_overrides>
<item_property_overrides name="apparelTShirtPlain">
<property name="UMA.Overlay0Tint" value="skin"/>
<property name="UMA.Overlay1Tint" value="251,157,50"/>
</item_property_overrides>
<item_property_overrides name="apparelTShirtZUWhite">
<property name="UMA.Overlay0Tint" value="skin"/>
<property name="UMA.Overlay1Tint" value="251,157,50"/>
</item_property_overrides>
<item_property_overrides name="apparelJacketLetterZU">
<property name="UMA.Overlay0Tint" value="154,31,42,255"/> <!-- stays red -->
<property name="UMA.Overlay1Tint" value="251,157,50"/>
<property name="UMA.Overlay2Tint" value="251,157,50"/>
</item_property_overrides>
<item_property_overrides name="apparelDenimShortsPants">
<property name="UMA.Overlay0Tint" value="skin"/>
<property name="UMA.Overlay1Tint" value="251,157,50"/>
</item_property_overrides>
<item_property_overrides name="apparelCoatPufferCoat">
<property name="CustomIconTint" value="251,157,50"/>
<property name="UMA.Overlay0Tint" value="251,157,50"/>
</item_property_overrides>
<item_property_overrides name="apparelFlannelShirt">
<property name="UMA.Overlay0Tint" value="133,14,14"/>
</item_property_overrides>
<property name="PickupJournalEntry" value="augmentGunsTip"/>
</item_modifier>
</append>
</Astralweaver>
Put your numbers where the color values are in an item_modifiers.xml Then for each item you want to change the color on add it in with the item name used in the items.xml file.