I'd encourage people to take a look at the comprehensive guide on FIRST's site.
http://www.usfirst.org/uploadedFiles...prehensive.pdf
Pages 19-24 cover the use of the logo on backgrounds as well as decorative elements. Be careful that you are not violating FIRST's rules.
Rules:
*Do not reconfigure or change the size of any part of the logo
*Do not alter or recreate the text within the logo
*Do not distort the logo
*Do not change the logo colors
*Do not create a 3D version of the logo and do not apply any visual effects including drop shadow, glow, blur, etc.
*Do not place the logo within any graphic shapes
*
Do not obsure or weaken the logo by placing it on visually active background patterns, strong textures, or incompatible shades of color
*Do not use the lettering from the logo as a word in a piece of text
*Do not use the logo as a word in a piece of text
In other words, please be careful with how you do it. You CAN use the logo on colored backgrounds but please adhere to FIRST's requests (page 19-24) in the comprehensive guide.
FIRST has put out some different colored logos for use, but please do not alter the color of the logo yourself, find one that suits your needs from their site.
Here is the zip file with the logos you may use:
Logo with text:
http://www.usfirst.org/uploadedFiles...o_cmyk_all.ZIP
Logo without text:
http://www.usfirst.org/uploadedFiles...ements_all.ZIP
It is in EPS format, if someone needs me to, I can convert it to a PNG.