Frequently asked questions about colors on the web:
Q: Should I use upper or lower case?
You can use upper or lower case, but if you want to be cool, use lower case. It’s old school, and goes back to the days of the C programming language.
Q: Why do they use hexadecimal?
Remember the old adage, computers count in zeroes and ones? It’s true, and it’s called binary (versus decimal or hexadecimal), but to make it easier we use hexadecimal. So 0 to 15 in decimal ranges from 0x00 to 0xFF in hexadecimal, which ranges from 0000 to 1111 in binary.
Q: What is CMYK?
CMYK is for Cyan-Magenta-Yellow-Key (black), and is frequently used in printing.
Q: What image types use web colors?
JPegs and PNG (pronouced Ping) files, although PNG files add another variable for transparency.