#51373D
Closest named color: Charcoal Grey (#3C4142). oklch(36.9% 0.038 3.9), rgb(81, 55, 61).
Aa
White text reads best on this color (10.69:1).
About this color
#51373D is a dark, muted red. In OKLCH its lightness is 37%, its chroma 0.038 and its hue 4°. Its hue sits on the warm side of the wheel. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.045 away. White text reads best on it, at 10.69:1.
| Hue family | Reds |
| Lightness | dark (37%) |
| Chroma | muted (0.038) |
| Temperature | warm |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 1.96:1 |
| White text | 10.69:1 |
Values
| HEX | #51373D |
| RGB | rgb(81, 55, 61) |
| HSL | hsl(346, 19%, 27%) |
| OKLCH | oklch(36.9% 0.038 3.9) |
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 #51373D | 10.69:1 | AAA | Lc -98.7 | Preferred for body text |
| Black text on #51373D | 1.96:1 | Fails | Lc 9.2 | Not readable |
| #51373D text on white | 10.69:1 | AAA | Lc 94.7 | Preferred for body text |
| #51373D text on black | 1.96:1 | 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
#F8F4F5
oklch(97.1% 0.004 360)
-
Step 100
100
#EFE8E9
oklch(93.7% 0.008 7.3)
-
Step 200
200
#E3D5D8
oklch(88.5% 0.016 2.7)
-
Step 300
300
#D2B9BE
oklch(80.8% 0.029 4.1)
-
Step 400
400
#BA959D
oklch(70.6% 0.046 3.8)
-
Step 500
500
#A97B85
oklch(63.1% 0.059 4.5)
-
Step 600
600
#94646F
oklch(55.7% 0.064 4.3)
-
Step 700
700
#7E525D
oklch(49.1% 0.061 3.2)
-
Step 800
800
#66444C
oklch(42.8% 0.048 3.9)
-
Step 900
900 (this color)
#51373D
oklch(36.9% 0.038 3.9)
-
Step 950
950
#312225
oklch(27.1% 0.024 5.5)
#51373D 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) | #3B3B3D | 0.041 |
| Deuteranopia (no green cones) | #41403C | 0.039 |
| Tritanopia (no blue cones) | #563539 | 0.011 |
| Achromatopsia (no color) | #3E3E3E | 0.039 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51373D
#51373D
oklch(36.9% 0.038 3.9)
- #274642
#274642
oklch(36.9% 0.038 185.2)
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 #51373D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.045
- Purple Brown #673A3F ΔE 0.045
- Onyx #343A40 ΔE 0.051
- Gunmetal #293241 ΔE 0.076
- Charcoal #264653 ΔE 0.077
- Dark Grey Blue #29465B ΔE 0.079
- Dark Blue Grey #1F3B4D ΔE 0.081
- Space Cadet #2B2D42 ΔE 0.082
Use #51373D 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.