#521D09
Closest named color: Chocolate Brown (#411900). oklch(30.9% 0.085 39.6), rgb(82, 29, 9).
Aa
White text reads best on this color (13.65:1).
About this color
#521D09 is a dark, moderately saturated red. In OKLCH its lightness is 31%, its chroma 0.085 and its hue 40°. Its hue sits on the warm side of the wheel. The nearest named color is Chocolate Brown (#411900), ΔE 0.043 away. White text reads best on it, at 13.65:1.
| Hue family | Reds |
| Lightness | dark (31%) |
| Chroma | moderately saturated (0.085) |
| Temperature | warm |
| Nearest name | Chocolate Brown (#411900) |
| Black text | 1.53:1 |
| White text | 13.65:1 |
Values
| HEX | #521D09 |
| RGB | rgb(82, 29, 9) |
| HSL | hsl(16, 80%, 18%) |
| OKLCH | oklch(30.9% 0.085 39.6) |
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 #521D09 | 13.65:1 | AAA | Lc -102.8 | Preferred for body text |
| Black text on #521D09 | 1.53:1 | Fails | Lc 0.0 | Not readable |
| #521D09 text on white | 13.65:1 | AAA | Lc 99.6 | Preferred for body text |
| #521D09 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
#FEF3EF
oklch(97.2% 0.013 41.2)
-
Step 100
100
#FCE4DC
oklch(93.6% 0.029 39.3)
-
Step 200
200
#FBCDBE
oklch(88.4% 0.056 38.8)
-
Step 300
300
#F9AA90
oklch(80.8% 0.101 39)
-
Step 400
400
#F2784D
oklch(70.6% 0.161 39.7)
-
Step 500
500
#E74F00
oklch(63% 0.2 39.6)
-
Step 600
600
#C34200
oklch(55.6% 0.175 39.8)
-
Step 700
700
#A53600
oklch(49% 0.155 39.6)
-
Step 800
800
#892B00
oklch(42.8% 0.136 39.4)
-
Step 900
900
#732300
oklch(37.7% 0.119 39.6)
-
Step 950
950 (this color)
#521D09
oklch(30.9% 0.085 39.6)
#521D09 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) | #2C2606 | 0.084 |
| Deuteranopia (no green cones) | #393207 | 0.076 |
| Tritanopia (no blue cones) | #5B1019 | 0.039 |
| Achromatopsia (no color) | #2E2E2E | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #521D09
#521D09
oklch(30.9% 0.085 39.6)
- #003643
#003643
oklch(30.8% 0.056 219.6)
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 #521D09, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chocolate Brown #411900 ΔE 0.043
- Mahogany #4A0100 ΔE 0.057
- Reddy Brown #6E1005 ΔE 0.061
- Claret #680018 ΔE 0.063
- Burgundy #610023 ΔE 0.068
- Dark Brown #341C02 ΔE 0.070
- Deep Brown #410200 ΔE 0.073
- Blood #770001 ΔE 0.081
Use #521D09 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.