#521B04
Closest named color: Chocolate Brown (#411900). oklch(30.5% 0.089 40.7), rgb(82, 27, 4).
Aa
White text reads best on this color (13.84:1).
About this color
#521B04 is a dark, moderately saturated brown. In OKLCH its lightness is 30%, its chroma 0.089 and its hue 41°. Its hue sits on the warm side of the wheel. The nearest named color is Chocolate Brown (#411900), ΔE 0.041 away. White text reads best on it, at 13.84:1.
| Hue family | Browns |
| Lightness | dark (30%) |
| Chroma | moderately saturated (0.089) |
| Temperature | warm |
| Nearest name | Chocolate Brown (#411900) |
| Black text | 1.51:1 |
| White text | 13.84:1 |
Values
| HEX | #521B04 |
| RGB | rgb(82, 27, 4) |
| HSL | hsl(18, 91%, 17%) |
| OKLCH | oklch(30.5% 0.089 40.7) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #521B04 | 13.84:1 | AAA | Lc -103.0 | Preferred for body text |
| Black text on #521B04 | 1.51:1 | Fails | Lc 0.0 | Not readable |
| #521B04 text on white | 13.84:1 | AAA | Lc 99.8 | Preferred for body text |
| #521B04 text on black | 1.51:1 | Fails | Lc 0.0 | Not readable |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 950.
-
Step 50
50
#FEF3EE
oklch(97.1% 0.014 46.2)
-
Step 100
100
#FDE4DB
oklch(93.7% 0.03 40.9)
-
Step 200
200
#FCCDBC
oklch(88.5% 0.058 40.8)
-
Step 300
300
#FBAA8C
oklch(81% 0.105 41.1)
-
Step 400
400
#F57646
oklch(70.7% 0.168 40.5)
-
Step 500
500
#E55200
oklch(63.1% 0.195 40.7)
-
Step 600
600
#C24400
oklch(55.7% 0.173 40.6)
-
Step 700
700
#A43800
oklch(49.1% 0.153 40.5)
-
Step 800
800
#872D00
oklch(42.7% 0.132 40.7)
-
Step 900
900
#722500
oklch(37.8% 0.117 40.9)
-
Step 950
950 (this color)
#521B04
oklch(30.5% 0.089 40.7)
#521B04 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #2B2501 | 0.087 |
| Deuteranopia (no green cones) | #383102 | 0.079 |
| Tritanopia (no blue cones) | #5B0C17 | 0.042 |
| Achromatopsia (no color) | #2D2D2D | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #521B04
#521B04
oklch(30.5% 0.089 40.7)
- #003543
#003543
oklch(30.5% 0.056 221.6)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #521B04, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chocolate Brown #411900 ΔE 0.041
- Mahogany #4A0100 ΔE 0.053
- Reddy Brown #6E1005 ΔE 0.062
- Claret #680018 ΔE 0.064
- Dark Brown #341C02 ΔE 0.068
- Burgundy #610023 ΔE 0.069
- Deep Brown #410200 ΔE 0.069
- Blood #770001 ΔE 0.082
Use #521B04 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.