#521D03
Closest named color: Chocolate Brown (#411900). oklch(30.8% 0.087 43.1), rgb(82, 29, 3).
Aa
White text reads best on this color (13.67:1).
About this color
#521D03 is a dark, moderately saturated brown. In OKLCH its lightness is 31%, its chroma 0.087 and its hue 43°. Its hue sits on the warm side of the wheel. The nearest named color is Chocolate Brown (#411900), ΔE 0.042 away. White text reads best on it, at 13.67:1.
| Hue family | Browns |
| Lightness | dark (31%) |
| Chroma | moderately saturated (0.087) |
| Temperature | warm |
| Nearest name | Chocolate Brown (#411900) |
| Black text | 1.53:1 |
| White text | 13.67:1 |
Values
| HEX | #521D03 |
| RGB | rgb(82, 29, 3) |
| HSL | hsl(20, 93%, 17%) |
| OKLCH | oklch(30.8% 0.087 43.1) |
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 #521D03 | 13.67:1 | AAA | Lc -102.8 | Preferred for body text |
| Black text on #521D03 | 1.53:1 | Fails | Lc 0.0 | Not readable |
| #521D03 text on white | 13.67:1 | AAA | Lc 99.7 | Preferred for body text |
| #521D03 text on black | 1.53:1 | 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
#FCE4DA
oklch(93.6% 0.03 44)
-
Step 200
200
#FBCEBB
oklch(88.5% 0.057 44.1)
-
Step 300
300
#F9AB8B
oklch(80.9% 0.102 43.1)
-
Step 400
400
#F37942
oklch(70.8% 0.165 43.3)
-
Step 500
500
#E15800
oklch(63.2% 0.187 43.1)
-
Step 600
600
#BE4900
oklch(55.6% 0.165 43.1)
-
Step 700
700
#A03C00
oklch(49% 0.145 43)
-
Step 800
800
#843100
oklch(42.7% 0.125 43.5)
-
Step 900
900
#6F2800
oklch(37.7% 0.111 43.6)
-
Step 950
950 (this color)
#521D03
oklch(30.8% 0.087 43.1)
#521D03 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) | #2C2600 | 0.084 |
| Deuteranopia (no green cones) | #393201 | 0.076 |
| Tritanopia (no blue cones) | #5B0F18 | 0.043 |
| Achromatopsia (no color) | #2E2E2E | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #521D03
#521D03
oklch(30.8% 0.087 43.1)
- #003645
#003645
oklch(30.9% 0.057 222.9)
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 #521D03, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chocolate Brown #411900 ΔE 0.042
- Mahogany #4A0100 ΔE 0.058
- Reddy Brown #6E1005 ΔE 0.062
- Claret #680018 ΔE 0.066
- Dark Brown #341C02 ΔE 0.069
- Burgundy #610023 ΔE 0.072
- Deep Brown #410200 ΔE 0.073
- Blood #770001 ΔE 0.082
Use #521D03 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.