I wanted a particular shade of color for the marquee in Tuesday Treats and for this blog too. So what do we do in such situations. None of the color suited me. Here is what you do. Search for any color picker online. Or if you have adobe or gimp then it's easy just pick a color and note the hex number - hash followed by 6 digits.
Then in blogger -> Layout->fonts and color - go to the what you want to change , for example - blog title color . Then to the right you see edit color hex code to the right. Type in the number and press enter for it to register and then save changes and view blog and you will have the exact color you wanted.