Connector for Jira use colors to indicate which cells are modified or requires your attention. To access color legend, use the menu icon and choose “Color legend”
On the next screen you will legend with explanation of each color:
Here you can see coloring in action:
Orange - there was a change in priority field
Yellow - that’s the row, where the change happened
Light Green - that’s the row, where will be data for new issue
Green - fields which are required in new issues
Red - wrong data eg. not existing issue type