Quick Ramp (Down).lua

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-- Adjusts the hue, saturation, and lightness of the current foreground color down slightly to help
-- create a quick color palette ramp.
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local spr = app.activeSprite
if not spr then
  return app.alert("There is no active sprite.")
end

app.transaction(
  function()
    local col = app.fgColor

    col.hslHue = col.hslHue - 5
    col.hslSaturation = col.hslSaturation - 0.05
    col.hslLightness = col.hslLightness - 0.05

    app.fgColor = col
  end
)

app.refresh()