#51373B
Closest named color: Charcoal Grey (#3C4142). oklch(36.8% 0.038 8.9), rgb(81, 55, 59).
Aa
White text reads best on this color (10.71:1).
About this color
#51373B is a dark, muted red. In OKLCH its lightness is 37%, its chroma 0.038 and its hue 9°. Its hue sits on the warm side of the wheel. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.044 away. White text reads best on it, at 10.71:1.
| Hue family | Reds |
| Lightness | dark (37%) |
| Chroma | muted (0.038) |
| Temperature | warm |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 1.95:1 |
| White text | 10.71:1 |
Values
| HEX | #51373B |
| RGB | rgb(81, 55, 59) |
| HSL | hsl(351, 19%, 27%) |
| OKLCH | oklch(36.8% 0.038 8.9) |
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 #51373B | 10.71:1 | AAA | Lc -98.7 | Preferred for body text |
| Black text on #51373B | 1.95:1 | Fails | Lc 9.1 | Not readable |
| #51373B text on white | 10.71:1 | AAA | Lc 94.8 | Preferred for body text |
| #51373B text on black | 1.95:1 | Fails | Lc -7.8 | 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
#E3D5D7
oklch(88.5% 0.016 7.5)
-
Step 300
300
#D2B9BD
oklch(80.8% 0.029 6.8)
-
Step 400
400
#BB959B
oklch(70.7% 0.046 7.7)
-
Step 500
500
#A97B82
oklch(63.1% 0.058 8.8)
-
Step 600
600
#94646C
oklch(55.6% 0.063 8.4)
-
Step 700
700
#7E535A
oklch(49.2% 0.058 8.7)
-
Step 800
800
#664449
oklch(42.7% 0.048 9.6)
-
Step 900
900 (this color)
#51373B
oklch(36.8% 0.038 8.9)
-
Step 950
950
#312224
oklch(27.1% 0.023 9.8)
#51373B 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) | #3B3B3B | 0.041 |
| Deuteranopia (no green cones) | #41403B | 0.039 |
| Tritanopia (no blue cones) | #563538 | 0.011 |
| Achromatopsia (no color) | #3E3E3E | 0.038 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51373B
#51373B
oklch(36.8% 0.038 8.9)
- #264643
#264643
oklch(36.8% 0.038 188)
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 #51373B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.044
- Purple Brown #673A3F ΔE 0.046
- Onyx #343A40 ΔE 0.051
- Gunmetal #293241 ΔE 0.076
- Charcoal #264653 ΔE 0.078
- Dark Grey Blue #29465B ΔE 0.080
- Dark Blue Grey #1F3B4D ΔE 0.082
- Space Cadet #2B2D42 ΔE 0.082
Use #51373B 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.