Color contrast Text color that is too similar to the background color will be hard to read (Kalbag, 2017, p. 75). Poor contrast between the foreground and background colors also makes content harder ...

WordPress' built-in editor has an HTML mode that lets you override the background color of a post by changing its CSS (Cascading Style Sheet) background-color attribute to the color of your choice.

To change the background color, drag a color swatch from the color picker and drop it on the window. Repeat as necessary with varying colors until you have one you like.