Hi Melinda,
Thanks for using Syncfusion Product.
At present there is no support for Changing Comment Indicator color in Grid Control, However, We have considered this as Feature Request and we have logged Feature Request.We will implement this feature in any of our upcoming releases. We usually have an interval of at least three months between releases. And the feature implementation would also greatly depend on the factors such as product design, code compatibility and complexity. So we request you to check with the product page in our website regarding this feature in the upcoming release. We will get back to you once this feature got implemented.
Please let us know if any other concerns.
Thanks,
Pannir