Color Design in GF Beer
Gluten-free grain systems can achieve the full beer color range. Pale lager and dark stout are both reachable — but the specialty malt toolkit is different from barley, and color predictions require calibration to GF-specific Lovibond values.
Sorghum and millet base malts produce pale wort naturally. Dark color requires intentional specialty malt addition — roasted millet, dark buckwheat, or color-adjusted sorghum malt. Blending correctly is a more deliberate process than in barley brewing.
| SRM Range | Color Description | Primary GF Grain Tool |
|---|---|---|
| 2–3 | Pale straw | Base sorghum malt + rice |
| 4–6 | Gold | Pale sorghum or millet malt |
| 7–10 | Amber | Light crystal millet or small buckwheat addition |
| 11–18 | Copper to brown | Medium buckwheat (10–15%) + base blend |
| 19–30 | Dark brown | Roasted millet malt (15–20%) + buckwheat |
| 31–40+ | Near-black | Maximum roasted millet + dark buckwheat blend |
Color Prediction in GF Brewing
Malt Color Units (MCU) calculations apply to GF malts using the same formula as barley — but published Lovibond values for GF specialty malts vary by supplier and batch. Get the spec sheet from your malt supplier and verify with a sample brew before committing to a commercial batch color target.
Morey's equation works reasonably well for GF grain blends: SRM ≈ 1.49 × MCU^0.69. Treat it as a starting estimate, not a precise prediction.
Color design mistakes:
- Using barley Lovibond values for GF specialty malts and getting unexpected results
- Trying to hit dark color targets with sorghum malt alone (it cannot get there)
- Over-adding roasted malt to hit color and pushing roast flavor beyond the style target
Source Notes
Color framework based on SRM measurement standards, GF malt Lovibond data, and Morey's color prediction equation.