uniform half4 colorWhite;

noinline bool IsEqual(half4 x, half4 y) {
    return x == y;
}

half4 main(float2 coords) {
    half4 colorBlue  = colorWhite.00ba,
          colorGreen = colorWhite.0g0a,
          colorRed   = colorWhite.r00a;
    half4 result;
    result = !IsEqual(colorWhite, colorBlue)                                // takes true side
               ? ( IsEqual(colorGreen, colorRed) ? colorRed : colorGreen)   // takes false side
               : (!IsEqual(colorRed, colorGreen) ? colorBlue : colorWhite); // not taken

    return  IsEqual(colorRed, colorBlue ) ? colorWhite :
           !IsEqual(colorRed, colorGreen) ? result :     // is taken
            IsEqual(colorRed, colorWhite) ? colorBlue :
                                            colorRed;
}