If it is sticky I would put it in the sticky category regardless of colour.
How I do it personally is (this could be TMI for some)
- STICKY - When it is thick and globs on my finger. When I squeeze some in between two fingers it just clugs.
- CREAMY - When it starts to resemble firm margarine. It has a smooth consistency but is still quite thick, still forms clugs if I try to stretch between two fingers, but has a smoother appearence
- WATERY - When it begins to get a thinner feel. It is not stretching just yet, but it doesn't clug when I press between two fingers, almost smears across the fingers. Resembles melted butter in consistency
- EWCM - Gets thicker but stretches between my fingers. Often goes a little cloudy in colour sometimes, but the stretch is the give away.
Everyone is different, and that may not be the same as you. But hope it helps.