GrADS Command: set ccols

## set ccols

`set ccols col1 col2 col3 ... colN`

Sets specific color numbers for contour levels specified by `set clevs`.

### Usage Notes

1. Contour colors are reset with every execution of `clear` or `display`.
2. User-specified ccols won't take effect unless clevs are also set.
3. If any of the color numbers is < 0, it is set to 0 (the background color).
4. (Version 2.0.0+) When using 'gxout shade2' or 'gxout shade2b', if any of the color numbers is < 0, the contour is not drawn (i.e., it is effectively transparent).
5. See section of User's Guide on controlling colors in Grads for more details.

### Examples