#373B2F
Closest named color: Onyx (#343A40). oklch(34.5% 0.021 122.5), rgb(55, 59, 47).
Aa
White text reads best on this color (11.48:1).
About this color
#373B2F is a dark close to neutral grey. In OKLCH its lightness is 34%, its chroma 0.021. It has too little chroma to lean warm or cool. The nearest named color is Onyx (#343A40), ΔE 0.031 away. White text reads best on it, at 11.48:1.
| Hue family | Neutrals |
| Lightness | dark (34%) |
| Chroma | close to neutral grey (0.021) |
| Temperature | neutral |
| Nearest name | Onyx (#343A40) |
| Black text | 1.82:1 |
| White text | 11.48:1 |
Values
| HEX | #373B2F |
| RGB | rgb(55, 59, 47) |
| HSL | hsl(80, 11%, 21%) |
| OKLCH | oklch(34.5% 0.021 122.5) |
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 #373B2F | 11.48:1 | AAA | Lc -100.2 | Preferred for body text |
| Black text on #373B2F | 1.82:1 | Fails | Lc 7.4 | Not readable |
| #373B2F text on white | 11.48:1 | AAA | Lc 96.5 | Preferred for body text |
| #373B2F text on black | 1.82:1 | Fails | Lc 0.0 | 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
#F5F6F4
oklch(97.2% 0.003 128.5)
-
Step 100
100
#E9EAE7
oklch(93.5% 0.004 121.6)
-
Step 200
200
#D8DAD4
oklch(88.5% 0.008 121.6)
-
Step 300
300
#BFC2B7
oklch(80.9% 0.016 119.2)
-
Step 400
400
#9EA392
oklch(70.7% 0.025 120.4)
-
Step 500
500
#868D78
oklch(63.2% 0.032 122.3)
-
Step 600
600
#6F7760
oklch(55.6% 0.036 123.2)
-
Step 700
700
#5D6450
oklch(49.1% 0.032 123.3)
-
Step 800
800
#4C5241
oklch(42.8% 0.028 123.4)
-
Step 900
900 (this color)
#373B2F
oklch(34.5% 0.021 122.5)
-
Step 950
950
#252820
oklch(27.1% 0.015 124.1)
#373B2F 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) | #3D392E | 0.011 |
| Deuteranopia (no green cones) | #3C392F | 0.010 |
| Tritanopia (no blue cones) | #383A38 | 0.017 |
| Achromatopsia (no color) | #393939 | 0.021 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #373B2F
#373B2F
oklch(34.5% 0.021 122.5)
- #3B3742
#3B3742
oklch(34.5% 0.02 301.9)
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 #373B2F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.031
- Charcoal Grey #3C4142 ΔE 0.034
- Pakistan Green #283618 ΔE 0.046
- Gunmetal #293241 ΔE 0.056
- Dark Olive #373E02 ΔE 0.057
- Dark Blue Grey #1F3B4D ΔE 0.059
- Charcoal #264653 ΔE 0.061
- Evergreen #05472A ΔE 0.064
Use #373B2F 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.