Rise Accessibility Issue: Carousel

Received accessibility feedback regarding the carousel numbers in Rise. The feedback:

Inactive carousel slide numbers have a color contrast ratio of 3.98:1. 

Text Color: #808080
Background: #ffffff

If possible, adjust the color of the text to increase the color contrast ratio to at least 4.5:1 or change the size to large text to meet this requirement. 

Correct me if wrong, but this is a Rise limitation and not possible to change, yes?  

Thank you!