#511B0B
Closest named color: Chocolate Brown (#411900). oklch(30.4% 0.085 36.8), rgb(81, 27, 11).
Aa
White text reads best on this color (13.89:1).
About this color
#511B0B is a dark, moderately saturated red. In OKLCH its lightness is 30%, its chroma 0.085 and its hue 37°. Its hue sits on the warm side of the wheel. The nearest named color is Chocolate Brown (#411900), ΔE 0.040 away. White text reads best on it, at 13.89:1.
| Hue family | Reds |
| Lightness | dark (30%) |
| Chroma | moderately saturated (0.085) |
| Temperature | warm |
| Nearest name | Chocolate Brown (#411900) |
| Black text | 1.51:1 |
| White text | 13.89:1 |
Values
| HEX | #511B0B |
| RGB | rgb(81, 27, 11) |
| HSL | hsl(14, 76%, 18%) |
| OKLCH | oklch(30.4% 0.085 36.8) |
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 #511B0B | 13.89:1 | AAA | Lc -103.1 | Preferred for body text |
| Black text on #511B0B | 1.51:1 | Fails | Lc 0.0 | Not readable |
| #511B0B text on white | 13.89:1 | AAA | Lc 100.0 | Preferred for body text |
| #511B0B text on black | 1.51:1 | 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
#FDE4DC
oklch(93.7% 0.03 38.6)
-
Step 200
200
#FBCDC0
oklch(88.5% 0.055 36.3)
-
Step 300
300
#FAAA92
oklch(81% 0.101 37.4)
-
Step 400
400
#F37753
oklch(70.7% 0.161 37)
-
Step 500
500
#EB4A0F
oklch(63.2% 0.206 36.9)
-
Step 600
600
#C83A00
oklch(55.6% 0.186 36.9)
-
Step 700
700
#A92F00
oklch(49% 0.165 36.7)
-
Step 800
800
#8C2600
oklch(42.7% 0.143 37)
-
Step 900
900
#761E00
oklch(37.7% 0.127 36.7)
-
Step 950
950 (this color)
#511B0B
oklch(30.4% 0.085 36.8)
#511B0B 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) | #2A2509 | 0.086 |
| Deuteranopia (no green cones) | #383109 | 0.078 |
| Tritanopia (no blue cones) | #5A0E18 | 0.036 |
| Achromatopsia (no color) | #2C2C2C | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #511B0B
#511B0B
oklch(30.4% 0.085 36.8)
- #003540
#003540
oklch(30.3% 0.054 216.5)
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 #511B0B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chocolate Brown #411900 ΔE 0.040
- Mahogany #4A0100 ΔE 0.051
- Claret #680018 ΔE 0.062
- Reddy Brown #6E1005 ΔE 0.063
- Burgundy #610023 ΔE 0.064
- Deep Brown #410200 ΔE 0.067
- Dark Brown #341C02 ΔE 0.067
- Dark Maroon #3C0008 ΔE 0.083
Use #511B0B 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.