Brock, one of my Mentees let me know about this awesome tool!
Stark is a free color-blind simulator and contrast checker plugin for Sketch.
Using the preview window, you can use the color blindness simulator and contrast checker to ensure your design is as great for those who don’t see the way a typical person does.
The simulator features 8 types of color blindness and has a integrated contrast checker.
Download Stark for free on getstark.co
Link: https://wearecolorblind.com/resources/stark-color-blindness-simulator/