fix(ui): fix bad value in darken
Other than inconsistency this seems to produce the wrong value (didn't test with the darken function from toolkit, but locally color.darken(30) produces different result than color.darken(0.3)).
Other than inconsistency this seems to produce the wrong value (didn't test with the darken function from toolkit, but locally color.darken(30) produces different result than color.darken(0.3)).