- RGB colour gamut is much larger than the CMYK gamut.
- RGB is Photoshop's default mode,
- RGB files are smaller, than CMYK,
- View > Gamut Warning - It gives you can overlay to show the unprintable colours.
- You can then use adjustment layers to remove the gamut warning's grey area.
- If you turn on proof colours as soon as you start editing, you can see how it will look when you print it out.
- The symbols next to the colour preview in photoshop's colour pickers indicate if the colours are web safe and printable.
- You can save, add, delete and load swatches like you can in Adobe Illustrator.
- The mode of a photoshop image cannot support two colour modes at once. Unlike Illustrator, CMYK and Spot colours cannot work side by side.
Creating a duotone image
- Image > duotone
- Duotones are editable at any point.
- You don't get the option to save in any format that won't support a duotone.
- You can also edit the tone in the channels menu. To a great extent.
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