What could help you is the following guide-line. Considering the ff6633 and blue, you chose for complementary colors. When you select ff6633 in e.g. Photoshop, you'll see it has an angle of 15 degrees. As you are looking for complementary colors, add 180 degrees to it and you get 0099cc (rgb + rgb = 255,255,255, in our example 255,102,51 (=ff6633) + 0,153,204 (0099CC) = 255,255,255). Suppose you like this as a basic color, you could pick other blues by changing the B(rightness) value.
It's not mathematics though, it's a guide-line. Maybe you like a blue at 180 or 210 degrees better.

Other options are using contrasting colors (about 90 degrees angle) or colors in about the same range (angle 15 to 30 degrees).

Hope this information was helpful.

use plain color it will look good

You can always use some site like colourlovers to upload a photo and it generates a palette for you

In color, like in life, sometimes we try to get a little bit of everything to overcome our fear of missing out on something. The overall effect, whether in design or in life, is a lack of focus and direction, which dilutes the strength of your direction.

Don't go with rainbow **anything** unless you are selling paints or something that involves "all colors." Don't be afraid to commit, less is more. Pick a scheme and go with it based on the emotional connotations of the colors and how they work into your message. (Blue=calm, red=urgent, etc.)

A short article on color theory [en.wikipedia.org] will give you the technical aspects of what you need to do. Out of all of them, a simple complimentary scheme with effective dominants and submissives will work out much better.

here check this link: [w3schools.com...] in this link you will find lot's of color to choose so that you can add them on your blog by simply copy and paste

I have a quick and dirty solution for colour scheme matching... simply use the free web-based [advanced.aviary.com...] tools for colour wheels. Define your starter colour, and how many swatches you need, and it will automatically define for you the best colours to match it.