#73311B
Closest named color: Chestnut (#742802). oklch(40% 0.099 38.6), rgb(115, 49, 27).
Aa
White text reads best on this color (9.61:1).
About this color
#73311B is a dark, moderately saturated red. In OKLCH its lightness is 40%, its chroma 0.099 and its hue 39°. Its hue sits on the warm side of the wheel. The nearest named color is Chestnut (#742802), ΔE 0.022 away. White text reads best on it, at 9.61:1.
| Hue family | Reds |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.099) |
| Temperature | warm |
| Nearest name | Chestnut (#742802) |
| Black text | 2.18:1 |
| White text | 9.61:1 |
Values
| HEX | #73311B |
| RGB | rgb(115, 49, 27) |
| HSL | hsl(15, 62%, 28%) |
| OKLCH | oklch(40% 0.099 38.6) |
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 #73311B | 9.61:1 | AAA | Lc -96.0 | Preferred for body text |
| Black text on #73311B | 2.18:1 | Fails | Lc 12.2 | Not readable |
| #73311B text on white | 9.61:1 | AAA | Lc 91.7 | Preferred for body text |
| #73311B text on black | 2.18:1 | Fails | Lc -10.7 | 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
#FCF3F1
oklch(97.1% 0.01 32.5)
-
Step 100
100
#F8E5E0
oklch(93.6% 0.022 35.1)
-
Step 200
200
#F3D1C6
oklch(88.6% 0.041 38.7)
-
Step 300
300
#ECB19E
oklch(81% 0.074 38.6)
-
Step 400
400
#E08568
oklch(70.7% 0.12 38.4)
-
Step 500
500
#D4633D
oklch(63.1% 0.152 38.8)
-
Step 600
600
#C04618
oklch(55.7% 0.166 38.7)
-
Step 700
700
#A53608
oklch(49.1% 0.154 38.5)
-
Step 800
800
#862E0D
oklch(42.7% 0.128 38.6)
-
Step 900
900 (this color)
#73311B
oklch(40% 0.099 38.6)
-
Step 950
950
#3F1A0D
oklch(27% 0.062 39.6)
#73311B 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) | #433C18 | 0.097 |
| Deuteranopia (no green cones) | #534A19 | 0.089 |
| Tritanopia (no blue cones) | #7F232C | 0.046 |
| Achromatopsia (no color) | #454545 | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #73311B
#73311B
oklch(40% 0.099 38.6)
- #005162
#005162
oklch(40.2% 0.072 218.2)
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 #73311B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chestnut #742802 ΔE 0.022
- Red Brown #8B2E16 ΔE 0.049
- Purple Brown #673A3F ΔE 0.050
- Rust Brown #8B3103 ΔE 0.051
- Reddy Brown #6E1005 ΔE 0.062
- Brown Red #922B05 ΔE 0.063
- Maroon #800000 ΔE 0.063
- Brick Red #8F1402 ΔE 0.064
Use #73311B 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.