Okay, listen: you're not going to learn InDesign by asking such little steps and tidbits here on Quora. Please pick up a few basic lessons from Adobe's Help &; Support pages.

Now, because it's Friday, let's reach out:

Use the Control bar at the top or (in versions since CC 2019) the Propertieswindow to set your Fill color. There are even a few other methods to do it (using the Swatches or Color window or the Eyedropper tool).

Oorspronkelijk geplaatst op Quora: How do I fill a rectangle with color in InDesign?"