To start testing color palettes, you must first create them. How do you know if your palette is ready for testing?

• It's based on color theory. You followed color theory to create a harmonious color combination.
• It fits your brand. The color palette represents your brand values according to color psychology.
• It's accessible. The palette includes colors with a range of contrast sufficient to comply with the Web Content Accessibility Guidelines.
• It doesn't have any controversial connotations. You took into consideration local color meanings if your product targets a specific country or region.

If these 4 conditions are satisfied, you're ready to move on to the testing stage.