Different options for using this color tool:
1. Click the small white circle and drag across the field of colors to choose one.
2. Slide this bar to find a new color.
3. Slide this bar to change the opacity. To the right makes it more opaque and to the left it makes it less opaque.
4. You can choose a color by entering a Hexadecimal number here.
5. You can choose a color here by entering R,G,B,A numbers.
6. You can select a color here by clicking on one of the squares.