I have made a small chart of the color Ultramarine Blue with different amounts of water added to it. The value of a color or how light or dark it is can be determined not just by the hue but by how much medium is used to dilute it.
This took me a long time to figure out.
Another tool for determining value is a piece of red plexiglass. You can see the dark areas show up as almost black . So if I wanted to get those dark areas to show up better I might use a thicker consistency of paint or add layers to achieve the deep tone.
What I have learned so far;
Watercolor is really not as much "water" as it is "color". It takes some courage but it helps to keep your paint wells wet and really load the brush with color. At least your paintings will be strong.
I say this knowing my big art opening at the Governor's Gallery is on Thursday the 13th. I have to dig into my well and be present and ready for everything that comes my way.
Live your life! Live Your Life! Live your Life!
I am a watercolor coach, watercolorist, and author.