Textual content is analyzed to determine a tone of the content. A first color palette including a first plurality of colors is computed. The first plurality of colors corresponds to the tone. A first color of the first plurality of colors is selected, and a second color palette including a second plurality of colors is computed. The second plurality of colors corresponds to the first plurality of colors and satisfies a predetermined color-related accessibility requirement between the first selected color and each of the second plurality of colors. A second color of the second plurality of colors is selected, and the content is modified using the first selected color and the second selected color.