A more precise sky color is something like 4080FF (or 2060FF) which translates into:

sky_color.red = 64; // 32
sky_color.green = 128; // 96
sky_color.blue = 255;

Of course, you'll likely want gradients as well.

"You level up the fastest and easiest if you do things at your own level and no higher or lower" - useful tip My 2D game - release on Jun 13th; My tutorials