#373A2F
Closest named color: Onyx (#343A40). oklch(34.2% 0.019 119.8), rgb(55, 58, 47).
Aa
White text reads best on this color (11.61:1).
About this color
#373A2F is a dark close to neutral grey. In OKLCH its lightness is 34%, its chroma 0.019. It has too little chroma to lean warm or cool. The nearest named color is Onyx (#343A40), ΔE 0.029 away. White text reads best on it, at 11.61:1.
| Hue family | Neutrals |
| Lightness | dark (34%) |
| Chroma | close to neutral grey (0.019) |
| Temperature | neutral |
| Nearest name | Onyx (#343A40) |
| Black text | 1.80:1 |
| White text | 11.61:1 |
Values
| HEX | #373A2F |
| RGB | rgb(55, 58, 47) |
| HSL | hsl(76, 10%, 21%) |
| OKLCH | oklch(34.2% 0.019 119.8) |
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 #373A2F | 11.61:1 | AAA | Lc -100.4 | Preferred for body text |
| Black text on #373A2F | 1.80:1 | Fails | Lc 0.0 | Not readable |
| #373A2F text on white | 11.61:1 | AAA | Lc 96.7 | Preferred for body text |
| #373A2F text on black | 1.80:1 | 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
#BFC2B8
oklch(80.9% 0.014 120.3)
-
Step 400
400
#9EA393
oklch(70.7% 0.023 121.1)
-
Step 500
500
#878C79
oklch(63% 0.028 119.2)
-
Step 600
600
#717662
oklch(55.6% 0.031 118.8)
-
Step 700
700
#5E6351
oklch(49% 0.029 120.1)
-
Step 800
800
#4D5142
oklch(42.7% 0.025 119.6)
-
Step 900
900 (this color)
#373A2F
oklch(34.2% 0.019 119.8)
-
Step 950
950
#262721
oklch(27% 0.011 114.8)
#373A2F 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) | #3C392E | 0.009 |
| Deuteranopia (no green cones) | #3B392F | 0.007 |
| Tritanopia (no blue cones) | #383937 | 0.015 |
| Achromatopsia (no color) | #393939 | 0.019 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #373A2F
#373A2F
oklch(34.2% 0.019 119.8)
- #3A3641
#3A3641
oklch(34.1% 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 #373A2F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.029
- Charcoal Grey #3C4142 ΔE 0.036
- Pakistan Green #283618 ΔE 0.046
- Gunmetal #293241 ΔE 0.053
- Dark Blue Grey #1F3B4D ΔE 0.058
- Dark Olive #373E02 ΔE 0.059
- Charcoal #264653 ΔE 0.062
- Evergreen #05472A ΔE 0.066
Use #373A2F 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.