The most important headings are formatted to be the most prominent in the report. For example, the highest level heading might be in a bold font with large bold letters, and an automatic space below the heading. Medium level headings will be slightly smaller and without the space below. Lower level headings may have only the first letter capitalized.

If you are working in a program similar to Microsoft Word, you will find pre-formatted styles which are available as headers at several levels. You can experiment with these to select the styles that you prefer.

The headers can be left black, like the main text of your document, or you can use one color for headers throughout (perhaps the company color). Just make sure that your use of color is not distracting from the report itself. Remember that you can always stick to black for unity and consistency.