.. meta:: :description: Overview of the color filters. .. metadata-placeholder :authors: - Wolthera van Hövell tot Westerflier - Raghavendra Kamath :license: GNU free documentation license 1.3 or later. .. index:: Filters .. _color_filters: ===== Color ===== Similar to the Adjust filters, the color filters are image wide color operations. .. index:: ! Color to Alpha .. _filter_color_to_alpha: Color to Alpha -------------- This filter allows you to make one single color transparent (alpha). By default when you run this filter white is selected, you can choose a color that you want to make transparent from the color selector. .. image:: /images/filters/Color-to-alpha.png The Threshold indicates how much other colors will be considered mixture of the removed color and non-removed colors. For example, with threshold set to 255, and the removed color set to white, a 50% gray will be considered a mixture of black+white, and thus transformed in a 50% transparent black. .. image:: /images/filters/Krita-color-to-alpha.png :align: center This filter is really useful in separating line art from the white background. .. _filter_color_transfer: Color Transfer -------------- This filter converts the colors of the image to colors from the reference image. This is a quick way to change a color combination of an artwork to an already saved image or a reference image. .. image:: /images/filters/Color-transfer.png .. _filter_maximize_channel: Maximize Channel ---------------- This filter checks for all the channels of a each single color and set all but the highest value to 0. .. _filter_minimize_channel: Minimize Channel ---------------- This is reverse to Maximize channel, it checks all the channels of a each single color and sets all but the lowest to 0.