c/c++ function to translate RGB bash terminal colot

gistfile1.txt

        // based on https://gist.github.com/mhulse/b11e568260fb8c3aa2a8
        void UserLedManager::print_terminal_background_color(const int &r, const int &g, const int &b) const
        {
            auto r_weight = r < 75 ? 0 : (r - 35) / 40;
            auto g_weight = g < 75 ? 0 : (g - 35) / 40;
            auto b_weight = b < 75 ? 0 : (b - 35) / 40;
            int status = (r_weight * 6 * 6 + g_weight * 6 + b_weight + 16);
            fprintf(stdout, "\e[48;5;%dm  %3d  \e[0m", status, status);
            fflush(stdout);
        }