#51100C
Closest named color: Mahogany (#4A0100). oklch(28.9% 0.096 28.3), rgb(81, 16, 12).
Aa
White text reads best on this color (14.69:1).
About this color
#51100C is a dark, moderately saturated red. In OKLCH its lightness is 29%, its chroma 0.096 and its hue 28°. Its hue sits on the warm side of the wheel. The nearest named color is Mahogany (#4A0100), ΔE 0.032 away. White text reads best on it, at 14.69:1.
| Hue family | Reds |
| Lightness | dark (29%) |
| Chroma | moderately saturated (0.096) |
| Temperature | warm |
| Nearest name | Mahogany (#4A0100) |
| Black text | 1.42:1 |
| White text | 14.69:1 |
Values
| HEX | #51100C |
| RGB | rgb(81, 16, 12) |
| HSL | hsl(3, 74%, 18%) |
| OKLCH | oklch(28.9% 0.096 28.3) |
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 #51100C | 14.69:1 | AAA | Lc -103.7 | Preferred for body text |
| Black text on #51100C | 1.42:1 | Fails | Lc 0.0 | Not readable |
| #51100C text on white | 14.69:1 | AAA | Lc 100.7 | Preferred for body text |
| #51100C text on black | 1.42:1 | 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
#FFF2F0
oklch(97.1% 0.014 28)
-
Step 100
100
#FFE2DE
oklch(93.5% 0.033 27.1)
-
Step 200
200
#FFCBC3
oklch(88.6% 0.06 28.4)
-
Step 300
300
#FFA599
oklch(80.8% 0.109 28)
-
Step 400
400
#FE6B5C
oklch(70.8% 0.182 28.4)
-
Step 500
500
#F72F28
oklch(63.1% 0.233 28.4)
-
Step 600
600
#D9000C
oklch(55.6% 0.228 28.3)
-
Step 700
700
#B80008
oklch(49.2% 0.201 28.3)
-
Step 800
800
#980005
oklch(42.7% 0.175 28.4)
-
Step 900
900
#7F0305
oklch(37.6% 0.152 28.4)
-
Step 950
950 (this color)
#51100C
oklch(28.9% 0.096 28.3)
#51100C 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) | #241F0B | 0.102 |
| Deuteranopia (no green cones) | #342D09 | 0.093 |
| Tritanopia (no blue cones) | #5A0010 | 0.027 |
| Achromatopsia (no color) | #282828 | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51100C
#51100C
oklch(28.9% 0.096 28.3)
- #003238
#003238
oklch(29% 0.05 207.5)
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 #51100C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mahogany #4A0100 ΔE 0.032
- Chocolate Brown #411900 ΔE 0.044
- Deep Brown #410200 ΔE 0.051
- Burgundy #610023 ΔE 0.053
- Claret #680018 ΔE 0.055
- Dark Maroon #3C0008 ΔE 0.066
- Reddy Brown #6E1005 ΔE 0.067
- Dark Brown #341C02 ΔE 0.071
Use #51100C 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.