<ngx-tab tabTitle how to give color to string interpolation{{ }} in angular

code:

<ngx-tab tabTitle="Data[{{empListById.length}}]" tabHeading [active]="activeEmpIndex === 1" [bypassDOM]="true">

i need to give color to only {{empListById.length}} not for whole Data[{{empListById.length}}]

example : current result : Data[2] expected result : Data[2] // 2 should be in green color