#731B17
Closest named color: Reddy Brown (#6E1005). oklch(37% 0.123 27.6), rgb(115, 27, 23).
Aa
White text reads best on this color (11.06:1).
About this color
#731B17 is a dark, moderately saturated red. In OKLCH its lightness is 37%, its chroma 0.123 and its hue 28°. 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 11.06:1.
| Hue family | Reds |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.123) |
| Temperature | warm |
| Nearest name | Reddy Brown (#6E1005) |
| Black text | 1.89:1 |
| White text | 11.06:1 |
Values
| HEX | #731B17 |
| RGB | rgb(115, 27, 23) |
| HSL | hsl(3, 67%, 27%) |
| OKLCH | oklch(37% 0.123 27.6) |
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 #731B17 | 11.06:1 | AAA | Lc -98.4 | Preferred for body text |
| Black text on #731B17 | 1.89:1 | Fails | Lc 9.5 | Not readable |
| #731B17 text on white | 11.06:1 | AAA | Lc 94.4 | Preferred for body text |
| #731B17 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
#FEF3F1
oklch(97.2% 0.012 29.9)
-
Step 100
100
#FBE4E0
oklch(93.6% 0.026 29.4)
-
Step 200
200
#F9CDC7
oklch(88.5% 0.051 27.2)
-
Step 300
300
#F6AAA0
oklch(80.8% 0.091 27.6)
-
Step 400
400
#EE796C
oklch(70.7% 0.147 27.9)
-
Step 500
500
#E54E44
oklch(63.1% 0.189 27.6)
-
Step 600
600
#D02724
oklch(55.6% 0.204 27.7)
-
Step 700
700
#B41417
oklch(49.1% 0.19 27.5)
-
Step 800
800
#921716
oklch(42.7% 0.158 27.5)
-
Step 900
900 (this color)
#731B17
oklch(37% 0.123 27.6)
-
Step 950
950
#451310
oklch(27% 0.078 27)
#731B17 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) | #353016 | 0.132 |
| Deuteranopia (no green cones) | #4B4313 | 0.121 |
| Tritanopia (no blue cones) | #7F001B | 0.034 |
| Achromatopsia (no color) | #3C3C3C | 0.124 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #731B17
#731B17
oklch(37% 0.123 27.6)
- #004951
#004951
oklch(37.1% 0.064 207.3)
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 #731B17, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Reddy Brown #6E1005 ΔE 0.024
- Blood #770001 ΔE 0.027
- Maroon #800000 ΔE 0.033
- Chestnut #742802 ΔE 0.034
- Wine Red #7B0323 ΔE 0.035
- Bordeaux #7B002C ΔE 0.047
- Claret #680018 ΔE 0.047
- Dark Red #8B0000 ΔE 0.051
Use #731B17 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.