Search TipsManaging Colors
Mari lets you control both how colors display, and how you select them. You can use the color management functionality provided by the View Transform toolbar to specify colorspaces for different aspects of your project, apply various color profiles (preset or custom), and apply LUTs (look-up tables).
Mari always has a Colors palette that allows you to set the “foreground” and “background” colors that Mari uses, and the colorspace of the color pickers and swatches displayed in the project. The foreground and background colors are also displayed in the Tools toolbar. By default, painting tools use the foreground color.
Note: Colorspaces can be configured discretely for the various aspects of Mari. The colorspace displayed in the Colors palette, only affects color pickers and swatches but you can change this colorspace and others in the Project Settings dialog, accessible from File > Settings.
For picking colors, Mari provides:
• a standard Eye Dropper tool.
• in the Colors palette, the Analyzer tab, which supplements the Eye Dropper with a range of colors you've selected, showing their average, minimum, and maximum color values.
• the Colors palette, which lets you pick colors interactively from a selection of pickers (including HSV, grayscale, blends, HDR, and from images) or just by entering specific color values.
• the ability to select colors from images in the Image Manager or a shelf.
You can also save colors in the shelf, and access these from inside the Add Paint Node / Add Bake Point / Add Channel dialogs using the Color Presets shelf. See Adding a Color to a Shelf.
Note: Both the Eye Dropper tool and Analyzer tab in the Colors palette can pick color values from HDR images, as long as the Paint Buffer hasn't been clamped.
Tip: You can also change the color depth of a channel if you need to. See Channels for details.
Warning: When working on an 8-bit (byte) channel that is in a non-linear colorspace, you need to set the virtual texture's type and paint buffer's color depth to 16-bit (half) or 32-bit (float) to minimize quantization errors. This only applies to the viewer and not to exported textures.
About the View Transform Toolbar
The View Transform toolbar is provided as an efficient way to enable or disable color management and set LUTs to the painting displayed on your screen. This functionality is used to be available from within the Color Manager (View Transform) palette (under the preset View Transform color profile). This was removed in favor of the toolbar, which is conveniently placed to make quick adjustments while painting.
The View Transform toolbar utilizes the OpenColorIO standard originally developed by Sony Pictures Imageworks. For a more comprehensive explanation of OpenColorIO, including LUT generation and suggested workflow strategies, please visit http://opencolorio.org/.
You can quickly toggle view transform using the Toggle View Transform 
button on the toolbar, as well as conveniently load LUT files using the select LUT 
button. There are also dropdown menus available for applying colorspace conversions.
Note: To turn off color management fully, navigate to File > Settings > Colorspace and disable Color Management Enabled.
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