sksl/shared/TernaryNesting.sksl

uniform half4 colorWhite;

half4 main(float2 coords) {
    half4 colorBlue  = colorWhite.00ba,
          colorGreen = colorWhite.0g0a,
          colorRed   = colorWhite.r00a;
    half4 result;
    result = (colorWhite != colorBlue)                              // TRUE
               ? (colorGreen == colorRed ? colorRed : colorGreen)   // FALSE
               : (colorRed != colorGreen ? colorBlue : colorWhite); // in false branch

    return colorRed == colorBlue  ? colorWhite :
           colorRed != colorGreen ? result :     // TRUE
           colorRed == colorWhite ? colorBlue :
                                    colorRed;
}