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Over on the right, where all the palettes are, there will be a palette for Color, Swatches, and Styles. If it is not showing, go to Windows > Show Colors. The Colors palette has sliders (small triangles under a horizontal line), and you can click and drag the triangle from left to right to change the value.
In the upper right of the palette is a right pointing arrow in a circle, click it and there is a menu to switch the sliders from CMYK to RGB to HSB, etc.
The Hue corresponds to the color wheel, and so colors are assigned a degree number from 1 to 360. Saturation refers to the chroma, I believe, but doesn't change the value of a color (also a handy experiment). Then the Balance refers to value.
Karin, I agree, changing to greyscale has been really educational for me, but I found I needed to take it to the next level and understand value in full color too. I started using an underpainting method that began with full colors instead of a single color wash-in, wash-out.
My next experiments will be to try to train myself to see subtle variations in warm and cool colors. Any suggestions?
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