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Hex.AdjustAlpha

Adjusts the alpha component of a hex color

EvaluationContext.Colour.Hex.AdjustAlpha( hexColor, alphaChange )
Parameter Type Required Description
hexColor STRING The hex color to adjust (e.g., "■ #01B8AA")
alphaChange DOUBLE The alpha adjustment (-1 to 1)

STRING Modified hex colour

EvaluationContext.Colour.Hex.AdjustAlpha("#5E81AC", -2.0) // Returns "#5E81AC66"

EvaluationContext.Colour.Hex.AdjustAlpha =
    (
        hexColor: STRING,
        alphaChange: DOUBLE
    ) =>

        VAR CleanHex = IF( LEFT( hexColor, 1) = "#", MID( hexColor, 2, 6), MID( hexColor, 1, 6 ) )
        VAR A = EvaluationContext.Colour.Hex.Alpha( hexColor )

        VAR NewA = EvaluationContext.Colour.Int.ToHex( MIN( MAX( A + alphaChange, 0 ), 1 ) * 255, 2 )

        VAR result = "#" & CleanHex & NewA

        RETURN result