Gradient colour scales — scale_colour_gradientscale_*_gradient creates a two colour gradient (low-high), scale_*_gradient2 creates a diverging colour gradient (low-mid-high), scale_*_gradientn creates a n-colour gradient. For binned variants of these scales, see the color steps scales. scale_colour_gradient( name = waiver(), ..., low = "#132B43", high = "#56B1F7", space = "Lab", na.value = "grey50", guide = "colourbar", aesthetics = "colour"
