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You can use standard colors ("red", "yellow", "green", "blue", etc.), or hexadecimal color codes (link to more html colors)
Smaller italic text for additional data in a question with CSS
Here is a common one for adding some meta-data to a question.
The code looks like:
| Code Block |
|---|
Were antiplatelet drugs begun on any day prior to the procedure date listed above?
<span style="font-weight: lighter; font-style:italic;">(your text here)</span> |
Text in a box and colored, centered, larger text using H3 with CSS
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