What Ember Add-on do I need for this situation?

I am wondering if there is an ember add-on that I can implement to do the following.

|-----------------------------------------------v----|
green                 yellow                      red

Color gradient bar of green > yellow > red and the v represents a value that lands there. Also where green, yellow, red start is based on values, so green could be 0-20 and yellow 21-40 and red 41+

I don't know what something like this would be called, but if anyone can let me know and help point me in the right direction, I would be much obliged.