#731D0B
Closest named color: Reddy Brown (#6E1005). oklch(37.1% 0.123 33.3), rgb(115, 29, 11).
Aa
White text reads best on this color (10.99:1).
About this color
#731D0B is a dark, moderately saturated red. In OKLCH its lightness is 37%, its chroma 0.123 and its hue 33°. Its hue sits on the warm side of the wheel. The nearest named color is Reddy Brown (#6E1005), ΔE 0.024 away. White text reads best on it, at 10.99:1.
| Hue family | Reds |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.123) |
| Temperature | warm |
| Nearest name | Reddy Brown (#6E1005) |
| Black text | 1.90:1 |
| White text | 10.99:1 |
Values
| HEX | #731D0B |
| RGB | rgb(115, 29, 11) |
| HSL | hsl(10, 83%, 25%) |
| OKLCH | oklch(37.1% 0.123 33.3) |
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 #731D0B | 10.99:1 | AAA | Lc -98.3 | Preferred for body text |
| Black text on #731D0B | 1.90:1 | Fails | Lc 9.6 | Not readable |
| #731D0B text on white | 10.99:1 | AAA | Lc 94.3 | Preferred for body text |
| #731D0B text on black | 1.90:1 | Fails | Lc -8.2 | 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 900.
-
Step 50
50
#FEF3F0
oklch(97.2% 0.013 35.7)
-
Step 100
100
#FBE4DF
oklch(93.6% 0.026 32.2)
-
Step 200
200
#F9CEC4
oklch(88.6% 0.051 33.3)
-
Step 300
300
#F6AB9A
oklch(80.9% 0.092 33.3)
-
Step 400
400
#EE7A62
oklch(70.7% 0.148 33)
-
Step 500
500
#E45133
oklch(63% 0.188 33.4)
-
Step 600
600
#CF2C00
oklch(55.6% 0.203 33.4)
-
Step 700
700
#AF2300
oklch(49% 0.18 33.3)
-
Step 800
800
#911C00
oklch(42.7% 0.156 33.4)
-
Step 900
900 (this color)
#731D0B
oklch(37.1% 0.123 33.3)
-
Step 950
950
#45140A
oklch(27% 0.078 33.4)
#731D0B 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) | #373007 | 0.129 |
| Deuteranopia (no green cones) | #4C4306 | 0.117 |
| Tritanopia (no blue cones) | #7F001A | 0.041 |
| Achromatopsia (no color) | #3C3C3C | 0.124 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #731D0B
#731D0B
oklch(37.1% 0.123 33.3)
- #004955
#004955
oklch(37.3% 0.065 213.2)
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 #731D0B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Reddy Brown #6E1005 ΔE 0.024
- Chestnut #742802 ΔE 0.024
- Blood #770001 ΔE 0.029
- Maroon #800000 ΔE 0.034
- Wine Red #7B0323 ΔE 0.045
- Dark Red #8B0000 ΔE 0.051
- Claret #680018 ΔE 0.055
- Bordeaux #7B002C ΔE 0.058
Use #731D0B 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.