十六进制颜色宏

#define RGBCOLOR_HEX(h) RGBCOLOR((((h)>>16)&0xFF), (((h)>>8)&0xFF), ((h)&0xFF))
#define RGBACOLOR_HEX(h,a) RGBACOLOR((((h)>>16)&0xFF), (((h)>>8)&0xFF), ((h)&0xFF), (a))
#define RGBPureColor(h) RGBCOLOR(h, h, h)