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What the HEX? How To Master Color Control in AI Image Generation with SOUL

2026-02-23 · blog launch post · Higgsfield · original

Topic: Image generation & editing (also: Prompting & AI assistants) · mode: Tutorial · tags: vendor claims

This Higgsfield blog tutorial from February 2026 introduces Soul HEX, a colour control built into Soul 2.0. It starts from the problem that image models struggle to follow colour descriptions or HEX codes, which matters for brand and product images. With Soul HEX, a user uploads up to 20 reference photos in the "Color signature" section and Soul 2.0 takes their colours into new images, with or without a Soul ID character or preset.

What is said

  • Final thoughts

What is said

★ — how much it matters to the source.

  • ★★★ Higgsfield introduces Soul HEX, built into Soul 2.0, which extracts the colours a user wants directly from any reference photo instead of asking for them to be described or coded. · Soul HEX, Soul 2.0
  • ★ Higgsfield's blog explains HEX codes as six-character colour codes in the format #RRGGBB, each pair giving the intensity of red, green and blue from 00 to FF.
  • ★★ Higgsfield says AI image models differ on HEX codes in prompts: some read them natively, others ignore them, and some treat them as loose guidance rather than exact instructions.
  • ★★ Higgsfield says colours described in words come out unreliably in AI images: "warm gold" might come out as mustard and "soft teal" as aquamarine.
  • ★★ Higgsfield says AI images made without precise colour control need manual correction in third-party applications, which defeats much of the efficiency advantage of generating them.
  • ★★ Soul HEX step 1: upload up to 20 photos with the wanted colours in the "Color signature" section when generating with Soul 2.0; a single photo is enough for it to pull the colour scheme. · Soul HEX, Soul 2.0
  • ★★ Soul HEX step 2: a Soul ID character and a preset can be chosen alongside the colour references, but neither is required: Soul 2.0 also generates without a character and with the "General" preset. · Soul HEX, Soul ID, Soul 2.0
  • ★★ Higgsfield says that after Generate is pressed, Soul HEX extracts and applies the colours behind the scenes, keeping the palette consistent with the reference. · Soul HEX
  • ★★ To match a brand palette, Higgsfield advises uploading an existing branded asset, such as a product shot, a social media graphic or a packaging mockup, as the Soul HEX reference, so new visuals keep the brand colours without specifying each value. · Soul HEX
  • ★★ To give an image a specific mood, Higgsfield advises uploading a reference photo with that atmosphere, such as the cool blue of a rainy street or the amber glow of golden hour, so Soul HEX carries the mood through colour alone. · Soul HEX
  • ★★ For a series of visuals that must feel cohesive, such as campaign assets, content calendars or product collections, Higgsfield advises uploading one reference to Soul HEX and generating multiple images that share its palette. · Soul HEX

Threads in this video

  • milestone · Soul on Higgsfield — Higgsfield introduces Soul HEX, built into Soul 2.0, which extracts the colours a user wants directly from any reference photo instead of asking for them to be described or coded.
  • first on record · How do you keep a consistent colour palette and visual style across generated images? — To match a brand palette, Higgsfield advises uploading an existing branded asset, such as a product shot, a social media graphic or a packaging mockup, as the Soul HEX reference, so new visuals keep the brand colours without specifying each value.

Where the stories that moved here went next

Mentioned

Central: HEX code · Soul 2.0 · Soul HEX

Also: Soul ID

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