#521D17
Closest named color: Chocolate Brown (#411900). oklch(31.1% 0.081 29), rgb(82, 29, 23).
Aa
White text reads best on this color (13.57:1).
About this color
#521D17 is a dark, moderately saturated red. In OKLCH its lightness is 31%, its chroma 0.081 and its hue 29°. Its hue sits on the warm side of the wheel. The nearest named color is Chocolate Brown (#411900), ΔE 0.050 away. White text reads best on it, at 13.57:1.
| Hue family | Reds |
| Lightness | dark (31%) |
| Chroma | moderately saturated (0.081) |
| Temperature | warm |
| Nearest name | Chocolate Brown (#411900) |
| Black text | 1.54:1 |
| White text | 13.57:1 |
Values
| HEX | #521D17 |
| RGB | rgb(82, 29, 23) |
| HSL | hsl(6, 56%, 21%) |
| OKLCH | oklch(31.1% 0.081 29) |
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 #521D17 | 13.57:1 | AAA | Lc -102.8 | Preferred for body text |
| Black text on #521D17 | 1.54:1 | Fails | Lc 0.0 | Not readable |
| #521D17 text on white | 13.57:1 | AAA | Lc 99.6 | Preferred for body text |
| #521D17 text on black | 1.54:1 | 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
#FEF2F1
oklch(97% 0.013 23.2)
-
Step 100
100
#FCE3DF
oklch(93.5% 0.028 28.5)
-
Step 200
200
#FBCDC5
oklch(88.6% 0.054 29.6)
-
Step 300
300
#F8A99D
oklch(80.8% 0.096 28.9)
-
Step 400
400
#F17767
oklch(70.8% 0.153 29.1)
-
Step 500
500
#E84B3C
oklch(63.1% 0.196 29.2)
-
Step 600
600
#D31F17
oklch(55.5% 0.212 29)
-
Step 700
700
#B70806
oklch(49.2% 0.198 29.1)
-
Step 800
800
#94120C
oklch(42.7% 0.164 29.1)
-
Step 900
900
#771B14
oklch(37.7% 0.128 29)
-
Step 950
950 (this color)
#521D17
oklch(31.1% 0.081 29)
#521D17 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) | #2B2716 | 0.084 |
| Deuteranopia (no green cones) | #383216 | 0.077 |
| Tritanopia (no blue cones) | #5B121C | 0.029 |
| Achromatopsia (no color) | #2E2E2E | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #521D17
#521D17
oklch(31.1% 0.081 29)
- #00383F
#00383F
oklch(31.2% 0.054 208.4)
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 #521D17, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chocolate Brown #411900 ΔE 0.050
- Claret #680018 ΔE 0.056
- Burgundy #610023 ΔE 0.057
- Mahogany #4A0100 ΔE 0.058
- Reddy Brown #6E1005 ΔE 0.061
- Deep Brown #410200 ΔE 0.074
- Dark Brown #341C02 ΔE 0.075
- Blood #770001 ΔE 0.081
Use #521D17 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.