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When typing in text you want to consider the color contrast between the text and the background. For small text (under size 18), a good contrast ratio to aim for is 4.5:1 or higher. For bigger text (over size 18) a good contrast ratio is 3:1 or higher. Black text on a white background or 21:1 is considered to be the most accessible contrast ratio. If you create a bullet list, the points need to have a contrast ratio above 3:1. Backgrounds with crazy features or patterns should be avoided at all costs. To check if your color contrast ratio is sufficient, you should use Adobe’s Color Contrast Analyzer tool.
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