#521F10
Closest named color: Chocolate Brown (#411900). oklch(31.3% 0.081 37), rgb(82, 31, 16).
Aa
White text reads best on this color (13.44:1).
About this color
#521F10 is a dark, moderately saturated red. In OKLCH its lightness is 31%, its chroma 0.081 and its hue 37°. Its hue sits on the warm side of the wheel. The nearest named color is Chocolate Brown (#411900), ΔE 0.047 away. White text reads best on it, at 13.44:1.
| Hue family | Reds |
| Lightness | dark (31%) |
| Chroma | moderately saturated (0.081) |
| Temperature | warm |
| Nearest name | Chocolate Brown (#411900) |
| Black text | 1.56:1 |
| White text | 13.44:1 |
Values
| HEX | #521F10 |
| RGB | rgb(82, 31, 16) |
| HSL | hsl(14, 67%, 19%) |
| OKLCH | oklch(31.3% 0.081 37) |
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 #521F10 | 13.44:1 | AAA | Lc -102.6 | Preferred for body text |
| Black text on #521F10 | 1.56:1 | Fails | Lc 0.0 | Not readable |
| #521F10 text on white | 13.44:1 | AAA | Lc 99.4 | Preferred for body text |
| #521F10 text on black | 1.56:1 | 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
#FCE4DD
oklch(93.6% 0.028 36.9)
-
Step 200
200
#FACEC1
oklch(88.6% 0.053 37.1)
-
Step 300
300
#F7AB95
oklch(80.9% 0.095 36.8)
-
Step 400
400
#EF7A58
oklch(70.7% 0.152 37)
-
Step 500
500
#E6501E
oklch(63.1% 0.195 37.1)
-
Step 600
600
#C83A00
oklch(55.6% 0.186 36.9)
-
Step 700
700
#A93000
oklch(49.1% 0.164 37)
-
Step 800
800
#8C2600
oklch(42.7% 0.143 37)
-
Step 900
900
#761F00
oklch(37.8% 0.126 37.1)
-
Step 950
950 (this color)
#521F10
oklch(31.3% 0.081 37)
#521F10 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) | #2D280E | 0.080 |
| Deuteranopia (no green cones) | #39330F | 0.074 |
| Tritanopia (no blue cones) | #5B141C | 0.036 |
| Achromatopsia (no color) | #2F2F2F | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #521F10
#521F10
oklch(31.3% 0.081 37)
- #003843
#003843
oklch(31.4% 0.056 215.6)
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 #521F10, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chocolate Brown #411900 ΔE 0.047
- Mahogany #4A0100 ΔE 0.061
- Reddy Brown #6E1005 ΔE 0.061
- Claret #680018 ΔE 0.062
- Burgundy #610023 ΔE 0.066
- Dark Brown #341C02 ΔE 0.072
- Deep Brown #410200 ΔE 0.077
- Blood #770001 ΔE 0.081
Use #521F10 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.