This is another way to clarify foreground and background.
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LBQBZT4I5CMGWZMLANB2ENFHT2Y6BGKYUOZDMULOPDR5X7HNWUBQC
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App.color{r=0.6, g=0.6, b=0.8, a=0.5}
App.color{r=0.8, g=0.8, b=0.9}