I really like the colours of the syntax highlighting in Apple’s XCode, I apply the colouring to all of the other code editing applications I use, these being Netbeans and BBEdit.

XCode Colours (RGB)
Selection 173, 206, 253
Comments 0, 116, 0
Documentation Comments 0, 116, 0
Documentation Comments Keywords 0, 116, 0
Strings 196, 26, 22
Characters 28, 0, 207
Numbers 28, 0, 207
Keywords 170, 13, 145
Pre-Processor Statements 100, 56, 32
URLs 14, 14, 225
Attributes 131, 108, 40
Project Class Names 63, 110, 116
Project Functions and Method Names 38, 71, 75