Coerce a string or a number to a color
Arguments
- x
 Object to be coerced. Can be a valid R color (see
colors()) or a hexademical.
See also
Other color functions: 
color_alpha_blend(),
color_alpha(),
color_from_hsv(),
color_from_normalized(),
color_normalize(),
color_to_hsv(),
color_to_int(),
color(),
gen_image_color(),
get_color(),
get_image_color(),
image_color_brightness(),
image_color_contrast(),
image_color_grayscale(),
image_color_invert(),
image_color_replace(),
image_color_tint()
