297 Warm Gold / Pearl Gold
BrickLink: Pearl Gold
Introduced in 2006, this color replaced most of the existing gold colors at that point: 189 Reddish Gold, 127 Gold, and 147 Sand Yellow Metallic.
In 2010, this color was reformulated to be much more consistent. The parts were darker at first because of this reformulation (see far right column in photo), but have since settled somewhere between the two shades.