The yellow orb in Geometry Dash is commonly listed as RGB 255, 255, 100, which converts to hex #FFFF64.

Quick note

Some generic yellow references online use #FFFF00, but the GD orb value from the forum post is the more specific match for the yellow orb.

RGB to hex

  • RGB: 255, 255, 100
  • Hex: #FFFF64

TL;DR: #FFFF64