rgbEX255(0,0,22)
rgbEx(r, g, b)
rgbEx255(r, g, b)
rgba(r, g, b, a)
rgba255(r, g, b, a)
Generate a single number containing a color with the given red, green, blue and optionally alpha components. rgbEx and rgba use components in the range 0-100, whereas rgbEx255 and rgba255 use components in the range 0-255. When an alpha is not provided, the resulting color is opaque. These are useful for conditions or actions taking a color parameter.
https://www.construct.net/en/make-games/manuals/construct-3/system-reference/system-expressions