Under the color tab when editing the tile in SMARTLY, you’ll see some help text below the input box. Currently we are only supporting a single gradient color-scheme, but in the future we’ll allow creating our own.
So, the gradient is
purple > blue > green > yellow > orange > red. The default values are in the help text, so if you want your “comfortable” temperature to be 20 degrees lower (moving the green area of the gradient down 20 degrees) for F, you’d use:
-30, 15, 32, 33, 50, 70, 100, 120
purple, blue, blue_end, green_start, green, yellow, orange, red
It will be once I get around to rolling the new version.