QB Issue Resolution:

no QBO does not allow for custom columns

gear>feedback and report/suggest it to the developers

Resolution for Issue 'Is there anyway of adding an extra column on the invoice for color etc?' available: Yes (Solved).
Source: Intuit Community forum.

Is there anyway of adding an extra column on the invoice for color etc?: this issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the issue yourself by looking for a resolution described below. If it is a complex issue or you are unable to solve the issue, you may contact us by clicking here or by using other support options.

Support for Invoice
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Error Recovery for Invoice [Canada]
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