Sindbad~EG File Manager

/* Graph structures can store 16 bits per color, so we use
5 bits each of Red, Green, and Blue.  The following definitions
are to be used with graph structures [not for displaying
formulas with display()]  */

#define RGB5(r,g,b)  (((r) << 10) | ((g) << 5) | (b))
#define RED5(x)  ((x) & (0x1f << 10))
#define GREEN5(x)  ((x) & (0x1f << 5))
#define BLUE5(x)  ((x) & 0x1f)
/* WINCOLOR gets the corresponding 24-bit color  */
#define WINCOLOR(x)  ( (RED5(x) << 6L) | (GREEN5(x) << 3L) | BLUE5(x))

#define BLUE    RGB5(0,0,16)
#define BRIGHTBLUE   RGB5(0,0,31)
#define GREEN   RGB5(0,16,0)
#define BRIGHTGREEN   RGB5(0,31,0)
#define CYAN    RGB5(0,16,16)
#define RED     RGB5(16,0,0)
#define BRIGHTRED   RGB5(31,0,0)
#define MAGENTA RGB5(16,0,16)
#define YELLOW  RGB5(31,31,0)
#define BROWN   RGB5(16,16,0)
#define BLACK    0
#define LIGHTGRAY RGB5(16,16,16)
#define DARKGRAY  RGB5(8,8,8)
#define WHITE     RGB5(31,31,31)