isColor(row, col)
Returns true if the cell found at (row, col) is a color and false otherwise.
Syntax
isColor(row, col)
Parameters
| Param | Description | 
|---|---|
row | Number: row index of the cell to be read ∈ [0..height] | 
col | Number: column index of the cell to be read ∈ [0..width] | 
Also available as the static method 
Quadrille.isColor(value), which takes a value instead of a cell position.