#73100B
Closest named color: Reddy Brown (#6E1005). oklch(35.9% 0.133 28.9), rgb(115, 16, 11).
Aa
White text reads best on this color (11.61:1).
About this color
#73100B is a dark, moderately saturated red. In OKLCH its lightness is 36%, its chroma 0.133 and its hue 29°. Its hue sits on the warm side of the wheel. The nearest named color is Reddy Brown (#6E1005), ΔE 0.012 away. White text reads best on it, at 11.61:1.
| Hue family | Reds |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.133) |
| Temperature | warm |
| Nearest name | Reddy Brown (#6E1005) |
| Black text | 1.80:1 |
| White text | 11.61:1 |
Values
| HEX | #73100B |
| RGB | rgb(115, 16, 11) |
| HSL | hsl(3, 83%, 25%) |
| OKLCH | oklch(35.9% 0.133 28.9) |
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 #73100B | 11.61:1 | AAA | Lc -99.0 | Preferred for body text |
| Black text on #73100B | 1.80:1 | Fails | Lc 8.8 | Not readable |
| #73100B text on white | 11.61:1 | AAA | Lc 95.2 | Preferred for body text |
| #73100B text on black | 1.80:1 | Fails | Lc -7.5 | 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
#FEF2F0
oklch(97% 0.013 28.9)
-
Step 100
100
#FDE3DF
oklch(93.6% 0.029 28.1)
-
Step 200
200
#FCCCC4
oklch(88.5% 0.056 29.2)
-
Step 300
300
#FBA89C
oklch(81% 0.1 28.5)
-
Step 400
400
#F47465
oklch(70.7% 0.16 28.6)
-
Step 500
500
#EB4638
oklch(63.1% 0.204 29)
-
Step 600
600
#D7100E
oklch(55.6% 0.222 28.8)
-
Step 700
700
#B80003
oklch(49.2% 0.201 28.9)
-
Step 800
800
#970706
oklch(42.8% 0.171 28.9)
-
Step 900
900 (this color)
#73100B
oklch(35.9% 0.133 28.9)
-
Step 950
950
#47100C
oklch(26.9% 0.084 28.3)
#73100B 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) | #312B09 | 0.144 |
| Deuteranopia (no green cones) | #494005 | 0.130 |
| Tritanopia (no blue cones) | #800011 | 0.029 |
| Achromatopsia (no color) | #393939 | 0.134 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #73100B
#73100B
oklch(35.9% 0.133 28.9)
- #00454E
#00454E
oklch(35.8% 0.062 209.5)
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 #73100B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Reddy Brown #6E1005 ΔE 0.012
- Blood #770001 ΔE 0.013
- Maroon #800000 ΔE 0.028
- Wine Red #7B0323 ΔE 0.035
- Claret #680018 ΔE 0.039
- Chestnut #742802 ΔE 0.042
- Bordeaux #7B002C ΔE 0.048
- Dark Red #8B0000 ΔE 0.051
Use #73100B 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.