get-background-add

Next: get-background-mult Up: wx:style-delta Previous: get-alignment-on

`get-background-add`

Gets the object additive colour shift for the background (applied after the multiplicative factor). Call this wx:add-colour% object's methods to change the style delta's additive backgound colour shift.

(send a-wx:style-delta get-background-add) -> wx:add-colour% object

PLT