#73180B
Closest named color: Reddy Brown (#6E1005). oklch(36.6% 0.127 31.3), rgb(115, 24, 11).
Aa
White text reads best on this color (11.26:1).
About this color
#73180B is a dark, moderately saturated red. In OKLCH its lightness is 37%, its chroma 0.127 and its hue 31°. Its hue sits on the warm side of the wheel. The nearest named color is Reddy Brown (#6E1005), ΔE 0.018 away. White text reads best on it, at 11.26:1.
| Hue family | Reds |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.127) |
| Temperature | warm |
| Nearest name | Reddy Brown (#6E1005) |
| Black text | 1.86:1 |
| White text | 11.26:1 |
Values
| HEX | #73180B |
| RGB | rgb(115, 24, 11) |
| HSL | hsl(8, 83%, 25%) |
| OKLCH | oklch(36.6% 0.127 31.3) |
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 #73180B | 11.26:1 | AAA | Lc -98.7 | Preferred for body text |
| Black text on #73180B | 1.86:1 | Fails | Lc 9.2 | Not readable |
| #73180B text on white | 11.26:1 | AAA | Lc 94.7 | Preferred for body text |
| #73180B text on black | 1.86:1 | Fails | Lc -7.9 | 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
#FCE4DF
oklch(93.7% 0.027 31.7)
-
Step 200
200
#FACDC4
oklch(88.5% 0.053 31.3)
-
Step 300
300
#F8AA9B
oklch(81% 0.095 31.3)
-
Step 400
400
#F07863
oklch(70.7% 0.152 31.4)
-
Step 500
500
#E74D35
oklch(63.1% 0.194 31.6)
-
Step 600
600
#D32205
oklch(55.6% 0.212 31.3)
-
Step 700
700
#B31800
oklch(49% 0.189 31.3)
-
Step 800
800
#941402
oklch(42.7% 0.163 31.3)
-
Step 900
900 (this color)
#73180B
oklch(36.6% 0.127 31.3)
-
Step 950
950
#46130B
oklch(27.1% 0.08 31.5)
#73180B 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) | #352E08 | 0.134 |
| Deuteranopia (no green cones) | #4B4205 | 0.123 |
| Tritanopia (no blue cones) | #7F0016 | 0.034 |
| Achromatopsia (no color) | #3B3B3B | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #73180B
#73180B
oklch(36.6% 0.127 31.3)
- #004752
#004752
oklch(36.5% 0.064 212.2)
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 #73180B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Reddy Brown #6E1005 ΔE 0.018
- Blood #770001 ΔE 0.022
- Maroon #800000 ΔE 0.030
- Chestnut #742802 ΔE 0.032
- Wine Red #7B0323 ΔE 0.040
- Claret #680018 ΔE 0.048
- Dark Red #8B0000 ΔE 0.051
- Bordeaux #7B002C ΔE 0.053
Use #73180B 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.