Apologizes if this is the wrong place to submit bug reports. I have seen an issue with version 6.0.20170401 of ncurses where using more than 256 color pairs no longer seems to work with the macro COLOR_PAIR.
The specific line of code I was using to init the colors was
init_pair(color, color, color);
Then to set the color
However when using more than 256 color pairs COLOR_PAIR no longer works correctly. If I use a custom macro instead of COLOR_PAIR it seems to work. So for example
#define MY_A_COLOR NCURSES_BITS(((1U) << 16) - 1U, 0)
#define MY_COLOR_PAIR(n) (NCURSES_BITS((n), 0) & MY_A_COLOR)
The change here is MY_A_COLOR uses a 16 bit shift instead of an 8 bit shift. I know that there was a change to support colors and colors pairs great than 16 bits, but in this case I am only using 512 pairs.