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Use hex codes to specify target colors in FLUX.2. Associate each code with an object or surface, using a phrase such as “the mug in color #FF0000”. Check the rendered color when accuracy matters.

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Basic Syntax

Signal hex colors with keywords like “color” or “hex” followed by the code:
Basic hex color syntax example with blue apple illustration
Apple: #0047AB
Brand color example
Walls: #C4725ASofa: #1B6B6FAccent: #E8A847
Sunflower with hex color prompting
Sunflower: #C92695
Liquid lucid composition with hex colors
#00FF2F#0D00FF#FF0000

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Gradient Colors

Apply gradients by specifying start and end colors:
Vase with gradient colors
Start: #02eb3cEnd: #edfa3cFlowers: #ff0088
Round silk throw pillow with radial gradient
Center: #6A0DADEdges: #FFD700
Panoramic sky with three horizontal gradient color zones
Upper: #1B0A3EMiddle: #CF6A2EHorizon: #E8728A
Product shot with pink-to-purple-to-blue gradient backdrop
Pink: #FF0080Violet: #7928CACobalt: #0070F3
Hex codes work best when clearly associated with specific objects. Vague references like “use #FF0000 somewhere” may produce inconsistent results.