Can I add a new color when i use Bulid Tool?

[wildfrontend]

this is default color list

and i want to add a new color

like
@white : #FFFFFF

i try it (i use Sematic-Ui-React)
<Header color="white"> .it doesnt work

and i change default color code

@grey : #A0A0A0; to
@grey : #FFFFFF;

print
<Header color="grey">
this time it does work it show color is white

but i want to add the new color ，not change default color ,can I?

[stale]

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