#511C1B
Closest named color: Chocolate Brown (#411900). oklch(30.8% 0.08 24), rgb(81, 28, 27).
Aa
White text reads best on this color (13.70:1).
About this color
#511C1B is a dark, moderately saturated red. In OKLCH its lightness is 31%, its chroma 0.080 and its hue 24°. Its hue sits on the warm side of the wheel. The nearest named color is Chocolate Brown (#411900), ΔE 0.051 away. White text reads best on it, at 13.70:1.
| Hue family | Reds |
| Lightness | dark (31%) |
| Chroma | moderately saturated (0.080) |
| Temperature | warm |
| Nearest name | Chocolate Brown (#411900) |
| Black text | 1.53:1 |
| White text | 13.70:1 |
Values
| HEX | #511C1B |
| RGB | rgb(81, 28, 27) |
| HSL | hsl(1, 50%, 21%) |
| OKLCH | oklch(30.8% 0.08 24) |
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 #511C1B | 13.70:1 | AAA | Lc -102.9 | Preferred for body text |
| Black text on #511C1B | 1.53:1 | Fails | Lc 0.0 | Not readable |
| #511C1B text on white | 13.70:1 | AAA | Lc 99.8 | Preferred for body text |
| #511C1B 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
#FEF2F1
oklch(97% 0.013 23.2)
-
Step 100
100
#FCE3E1
oklch(93.6% 0.028 23.2)
-
Step 200
200
#FACCC8
oklch(88.4% 0.053 24)
-
Step 300
300
#F8A9A3
oklch(81% 0.094 24.2)
-
Step 400
400
#F07671
oklch(70.7% 0.151 24.1)
-
Step 500
500
#E74A4C
oklch(63.1% 0.194 23.9)
-
Step 600
600
#D31E2E
oklch(55.7% 0.211 24.2)
-
Step 700
700
#B60621
oklch(49.1% 0.196 24.1)
-
Step 800
800
#94111D
oklch(42.8% 0.162 24.2)
-
Step 900
900
#771A1D
oklch(37.8% 0.127 24.2)
-
Step 950
950 (this color)
#511C1B
oklch(30.8% 0.08 24)
#511C1B 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) | #29261B | 0.086 |
| Deuteranopia (no green cones) | #37321A | 0.079 |
| Tritanopia (no blue cones) | #59121C | 0.024 |
| Achromatopsia (no color) | #2D2D2D | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #511C1B
#511C1B
oklch(30.8% 0.08 24)
- #00373C
#00373C
oklch(30.7% 0.052 204.7)
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 #511C1B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chocolate Brown #411900 ΔE 0.051
- Burgundy #610023 ΔE 0.053
- Claret #680018 ΔE 0.056
- Mahogany #4A0100 ΔE 0.056
- Reddy Brown #6E1005 ΔE 0.064
- Deep Brown #410200 ΔE 0.072
- Dark Brown #341C02 ΔE 0.076
- Blood #770001 ΔE 0.083
Use #511C1B 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.