Unlike Adobe Photoshop, which offers contrast adjustments and adjustment layers, Adobe Illustrator doesn’t include a command or tool that explicitly addresses the need to increase color contrast. Despite Illustrator’s lack of processes designed for this specific purpose, you can use it to achieve the same effects by altering object colors using the Hue, Saturation and Brightness color model. HSB separates hue, which defines shade or tone, from saturation’s vividness and brightness’s gradation from light to dark. You can combine two of these parameters to achieve the contrast adjustments you use in other graphics applications. Tips Warnings Writer Bio
