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An HIV test is done in either an SST or red-top tube. It is NOT done in a royal blue tube. An HIV test submitted in a royal blue tube will be rejected.
If your asking about what colored tubes blood is taken in, it's usually purple or lavender colored for CBC's (complete blood count). If you need blood, a Pink or larger purple/lavender top will be drawn for Blood Bank matching.
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Lavander is often used for calming people.
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The color tube you use when drawing blood for a lab test depends on the type of test you are running. For a Na blood test you would use a red tiger strip tube.
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