uint32_t red_to_green(int val, bool for_text){
        const std::vector<uint32_t>& color_scale = for_text ? red_green_scale_text : red_green_scale;

        SDL_Color a = int_to_color(*color_scale.begin());
        SDL_Color b = int_to_color(*color_scale.end() - 1);

        val = std::max<int>(0, std::min<int>(val, 100));

        return
            (((a.r * val + b.r * (1 - val)) ) ) +
            (((a.g * val + b.g * (1 - val)) ) ) +
            (((a.b * val + b.b * (1 - val)) ) ) +
            SDL_ALPHA_OPAQUE;
    }