Start Adobe Photoshop. Create a new canvas or open an existing image. Select the Brush tool. To do this, click on the toolbar button with the image of the brush or press B.
Please note: many of the buttons has its own submenu, allowing you to select a certain type of tool. Brush available options: normal "Brush", "Pencil", "Replacement color" and "Mix-Brush". To switch between them using the mouse, click the arrow in the lower right corner of the tool, and the keyboard use the keyboard shortcut Shift+B.
Make sure in the editor palette appears. If you can't see it, select the marker item "Samples" in menu "Window". Move the cursor to the palette, it will change your view. Click the left mouse button on the selected color - the color for the brush to be determined, and you will be able to start drawing.
If you are not satisfied with the shade, and the palette of samples missing the color you want, move the cursor to the bottom edge of the toolbar. There appear two squares: the top one corresponds to the color of the brush, the lower the background color. Left click the mouse on the top square, will open an expanded palette of colors.
Using the left mouse button to select the desired color or enter numeric values in the appropriate boxes palettes RGB, HSB, Lab or CMYK, and then click OK. The selected shade will be the main color of the brush.
To expand the palette of colors or add new colors, click the arrow in the upper right corner of the Swatch panel. Click it with the left mouse button, unfold the drop down menu where you can set the desired parameters or to specify the path to a custom palette by using the appropriate commands.