Converts an RGBA color to an ARGB Hex8 string Rarely used, but required for "toFilter()"
Assumes: r, g, b are contained in the set [0, 255] and a in [0, 1] Returns: a 8 character argb hex
Converts an RGBA color to an ARGB Hex8 string Rarely used, but required for "toFilter()"
Assumes: r, g, b are contained in the set [0, 255] and a in [0, 1] Returns: a 8 character argb hex