Spun

To create a gradient from one color to the other with Photoshop (like, um, a lightening blue sky), choose set the foreground color to the starting color and your background color to the ending color. Select the area in your image where the gradient will occur. Then choose the gradient tool (in Photoshop, not ImageReady) and draw a line in the direction the gradient should occur (up/down, horizontal, diagonally, like in the screen grab.

(Disclaimer: I am Photoshop-stupid, and this is rudimentary how-to on the Gradient tool, which I just discovered today.)

CSS guru Eric Meyer’s Color Blender tool takes two colors and a number of midpoints and returns all the shades in between. I used the Color Blender to calculate the blues in this site’s design. Neat, helpful Javascript widget for the color-dumb.