The SRM (Standard Reference Method) color chart is the homebrewer's visual reference for predicting and communicating beer color. SRM is a numerical scale from 1 (water-clear straw) to 40+ (opaque black), measured by the absorption of light at a specific wavelength. Knowing the SRM values for different styles and the grains that produce them lets you design recipes that hit the expected visual character of the style you're brewing, and helps you identify which specialty grains to add or remove when a beer comes out too dark or too pale.
The complete SRM color chart
| SRM | Color name | Appearance | Typical styles |
|---|---|---|---|
| 1–2 | Pale straw | Nearly water-clear, faint yellow | American light lager, Berliner weisse |
| 3–4 | Straw | Light golden yellow | Pilsner, pale lager |
| 5–6 | Gold | Bright gold | Blonde ale, Kölsch, golden strong |
| 7–9 | Deep gold | Rich gold to orange-gold | Pale ale, saison, witbier |
| 10–14 | Amber | Clear amber-orange | American amber ale, märzen, Vienna lager |
| 15–17 | Deep amber/copper | Deep copper-red | Irish red ale, altbier, ESB |
| 18–24 | Brown | Dark brown, moderate transparency | Brown ale, dunkel, Scottish ale |
| 25–30 | Dark brown | Very dark, near opaque | Porter, robust porter, dark mild |
| 31–35 | Very dark brown | Opaque dark with ruby tint in glass | Dry stout, schwarzbier |
| 36–40 | Black | Fully opaque; deep black | American stout, foreign extra stout |
| 40+ | Opaque black | No light transmission | Imperial stout, Baltic porter |
Grain colors and their SRM contribution
| Grain | Color (°Lovibond) | Notes |
|---|---|---|
| 2-Row pale malt | 1.5–2°L | Base for most American ales |
| Pilsner malt | 1.5–2°L | Lighter base for lagers |
| Vienna malt | 3–4°L | Adds slight amber |
| Munich malt | 8–10°L | Contributes amber-gold color and malt flavor |
| Crystal/Caramel 40 | 40°L | Amber; adds caramel sweetness |
| Crystal/Caramel 120 | 120°L | Deep amber-brown; dried fruit character |
| Chocolate malt | 350–400°L | Dark brown; roast and chocolate flavor |
| Black patent malt | 500–600°L | Black; intense roast, use sparingly |
| Roasted barley | 300–500°L | Black; dry stout character |
Common Questions
My beer came out darker than the SRM calculation predicted. Why?
Boil darkening (Maillard reactions) adds 2–5 SRM units beyond the grain-derived calculation, especially in longer or more vigorous boils. Highly alkaline mash water extracts more color from dark malts than neutral or acidic water. First-wort color (before the boil) is typically lighter than finished beer color. Add 2–3 SRM to your calculation as a correction for standard 60-minute boils; add more for longer boils or alkaline water profiles. Most brewing software includes a boil-darkening correction factor you can calibrate to your system over several batches.
Is SRM the same as EBC?
SRM and EBC (European Brewing Convention) both measure beer color but use different scales. The conversion is: EBC = SRM × 1.97 (approximately 2×). So SRM 10 ≈ EBC 20, SRM 20 ≈ EBC 40. European recipes and grain specifications often use EBC; American homebrew resources predominantly use SRM. When reading a European recipe or grain spec sheet, check which scale is being used, an EBC 300 chocolate malt is the same grain as a 150 SRM chocolate malt, so the visual difference between the scales can be confusing without knowing the conversion.