#511303
Closest named color: Mahogany (#4A0100). oklch(29.2% 0.096 35.6), rgb(81, 19, 3).
Aa
White text reads best on this color (14.53:1).
About this color
#511303 is a dark, moderately saturated red. In OKLCH its lightness is 29%, its chroma 0.096 and its hue 36°. Its hue sits on the warm side of the wheel. The nearest named color is Mahogany (#4A0100), ΔE 0.037 away. White text reads best on it, at 14.53:1.
| Hue family | Reds |
| Lightness | dark (29%) |
| Chroma | moderately saturated (0.096) |
| Temperature | warm |
| Nearest name | Mahogany (#4A0100) |
| Black text | 1.44:1 |
| White text | 14.53:1 |
Values
| HEX | #511303 |
| RGB | rgb(81, 19, 3) |
| HSL | hsl(12, 93%, 16%) |
| OKLCH | oklch(29.2% 0.096 35.6) |
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 #511303 | 14.53:1 | AAA | Lc -103.6 | Preferred for body text |
| Black text on #511303 | 1.44:1 | Fails | Lc 0.0 | Not readable |
| #511303 text on white | 14.53:1 | AAA | Lc 100.6 | Preferred for body text |
| #511303 text on black | 1.44:1 | 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
#FFF2EF
oklch(97.1% 0.015 33.1)
-
Step 100
100
#FFE3DB
oklch(93.7% 0.033 36.5)
-
Step 200
200
#FFCBBE
oklch(88.4% 0.062 34.4)
-
Step 300
300
#FFA78F
oklch(81% 0.11 36)
-
Step 400
400
#FC6F4A
oklch(70.8% 0.181 35.7)
-
Step 500
500
#F04100
oklch(63.1% 0.219 35.5)
-
Step 600
600
#CB3600
oklch(55.7% 0.192 35.6)
-
Step 700
700
#AB2C00
oklch(49% 0.169 35.7)
-
Step 800
800
#8E2300
oklch(42.8% 0.148 35.7)
-
Step 900
900
#771C00
oklch(37.7% 0.13 35.8)
-
Step 950
950 (this color)
#511303
oklch(29.2% 0.096 35.6)
#511303 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) | #262001 | 0.098 |
| Deuteranopia (no green cones) | #352E01 | 0.089 |
| Tritanopia (no blue cones) | #5A0010 | 0.036 |
| Achromatopsia (no color) | #292929 | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #511303
#511303
oklch(29.2% 0.096 35.6)
- #00323C
#00323C
oklch(29.2% 0.052 215.5)
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 #511303, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mahogany #4A0100 ΔE 0.037
- Chocolate Brown #411900 ΔE 0.038
- Deep Brown #410200 ΔE 0.054
- Claret #680018 ΔE 0.060
- Burgundy #610023 ΔE 0.062
- Reddy Brown #6E1005 ΔE 0.066
- Dark Brown #341C02 ΔE 0.067
- Dark Maroon #3C0008 ΔE 0.071
Use #511303 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.