Wahoo colour codes

When my Wahoo is showing the route recorded, it uses a colour coding scheme to show how severe the climb is. I did some experiments today while cycling up and down Howth Hill and figured out what the colours mean.

• Downhill = Gray (no matter how steep the descent)
• Grade 0-4% = Green
• Grade 4-8% = Yellow
• Grade above 8% = Red 

For example, the picture on the right shows my screen after climbing the steep side of Howth hill. As you can see the climb is mostly yellow (4-8%) with only a bit of red (after passing the church) and a little bit of green (near the top of the climb it levels out).