#731B10
Closest named color: Reddy Brown (#6E1005). oklch(36.9% 0.124 30.7), rgb(115, 27, 16).
Aa
White text reads best on this color (11.09:1).
About this color
#731B10 is a dark, moderately saturated red. In OKLCH its lightness is 37%, its chroma 0.124 and its hue 31°. Its hue sits on the warm side of the wheel. The nearest named color is Reddy Brown (#6E1005), ΔE 0.022 away. White text reads best on it, at 11.09:1.
| Hue family | Reds |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.124) |
| Temperature | warm |
| Nearest name | Reddy Brown (#6E1005) |
| Black text | 1.89:1 |
| White text | 11.09:1 |
Values
| HEX | #731B10 |
| RGB | rgb(115, 27, 16) |
| HSL | hsl(7, 76%, 26%) |
| OKLCH | oklch(36.9% 0.124 30.7) |
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 #731B10 | 11.09:1 | AAA | Lc -98.4 | Preferred for body text |
| Black text on #731B10 | 1.89:1 | Fails | Lc 9.4 | Not readable |
| #731B10 text on white | 11.09:1 | AAA | Lc 94.5 | Preferred for body text |
| #731B10 text on black | 1.89:1 | Fails | Lc -8.1 | 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
#F9CDC5
oklch(88.4% 0.051 30.1)
-
Step 300
300
#F7AA9C
oklch(80.9% 0.094 30.6)
-
Step 400
400
#EF7966
oklch(70.8% 0.149 30.6)
-
Step 500
500
#E54F3A
oklch(63.1% 0.19 30.9)
-
Step 600
600
#D12713
oklch(55.6% 0.207 30.7)
-
Step 700
700
#B41501
oklch(49.1% 0.192 30.8)
-
Step 800
800
#921809
oklch(42.7% 0.158 30.8)
-
Step 900
900 (this color)
#731B10
oklch(36.9% 0.124 30.7)
-
Step 950
950
#45130C
oklch(26.9% 0.079 30.8)
#731B10 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) | #362F0E | 0.131 |
| Deuteranopia (no green cones) | #4B430B | 0.121 |
| Tritanopia (no blue cones) | #7F0019 | 0.036 |
| Achromatopsia (no color) | #3C3C3C | 0.125 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #731B10
#731B10
oklch(36.9% 0.124 30.7)
- #004852
#004852
oklch(36.8% 0.064 210.5)
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 #731B10, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Reddy Brown #6E1005 ΔE 0.022
- Blood #770001 ΔE 0.026
- Chestnut #742802 ΔE 0.030
- Maroon #800000 ΔE 0.032
- Wine Red #7B0323 ΔE 0.040
- Claret #680018 ΔE 0.050
- Dark Red #8B0000 ΔE 0.051
- Bordeaux #7B002C ΔE 0.052
Use #731B10 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.