#731D1B
Closest named color: Reddy Brown (#6E1005). oklch(37.3% 0.12 26.3), rgb(115, 29, 27).
Aa
White text reads best on this color (10.93:1).
About this color
#731D1B is a dark, moderately saturated red. In OKLCH its lightness is 37%, its chroma 0.120 and its hue 26°. Its hue sits on the warm side of the wheel. The nearest named color is Reddy Brown (#6E1005), ΔE 0.028 away. White text reads best on it, at 10.93:1.
| Hue family | Reds |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.120) |
| Temperature | warm |
| Nearest name | Reddy Brown (#6E1005) |
| Black text | 1.92:1 |
| White text | 10.93:1 |
Values
| HEX | #731D1B |
| RGB | rgb(115, 29, 27) |
| HSL | hsl(1, 62%, 28%) |
| OKLCH | oklch(37.3% 0.12 26.3) |
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 #731D1B | 10.93:1 | AAA | Lc -98.2 | Preferred for body text |
| Black text on #731D1B | 1.92:1 | Fails | Lc 9.7 | Not readable |
| #731D1B text on white | 10.93:1 | AAA | Lc 94.3 | Preferred for body text |
| #731D1B text on black | 1.92:1 | Fails | Lc -8.3 | 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
#FEF3F1
oklch(97.2% 0.012 29.9)
-
Step 100
100
#FBE4E1
oklch(93.7% 0.026 26.5)
-
Step 200
200
#F9CDC8
oklch(88.5% 0.05 25.7)
-
Step 300
300
#F6AAA2
oklch(80.9% 0.091 25.9)
-
Step 400
400
#ED7970
oklch(70.7% 0.145 25.9)
-
Step 500
500
#E3504A
oklch(63.1% 0.184 26.1)
-
Step 600
600
#CF2A2C
oklch(55.7% 0.2 26.2)
-
Step 700
700
#B2181E
oklch(49% 0.186 26.3)
-
Step 800
800
#911A1B
oklch(42.8% 0.154 26.4)
-
Step 900
900 (this color)
#731D1B
oklch(37.3% 0.12 26.3)
-
Step 950
950
#451411
oklch(27.1% 0.076 26.9)
#731D1B 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) | #36311A | 0.129 |
| Deuteranopia (no green cones) | #4B4318 | 0.118 |
| Tritanopia (no blue cones) | #7F001E | 0.036 |
| Achromatopsia (no color) | #3D3D3D | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #731D1B
#731D1B
oklch(37.3% 0.12 26.3)
- #004A51
#004A51
oklch(37.3% 0.064 205.6)
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 #731D1B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Reddy Brown #6E1005 ΔE 0.028
- Blood #770001 ΔE 0.031
- Wine Red #7B0323 ΔE 0.034
- Chestnut #742802 ΔE 0.034
- Maroon #800000 ΔE 0.035
- Bordeaux #7B002C ΔE 0.045
- Claret #680018 ΔE 0.049
- Dark Red #8B0000 ΔE 0.052
Use #731D1B 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.