#373B2A
Closest named color: Onyx (#343A40). oklch(34.3% 0.029 118.7), rgb(55, 59, 42).
Aa
White text reads best on this color (11.52:1).
About this color
#373B2A is a dark close to neutral grey. In OKLCH its lightness is 34%, its chroma 0.029. It has too little chroma to lean warm or cool. The nearest named color is Onyx (#343A40), ΔE 0.039 away. White text reads best on it, at 11.52:1.
| Hue family | Neutrals |
| Lightness | dark (34%) |
| Chroma | close to neutral grey (0.029) |
| Temperature | neutral |
| Nearest name | Onyx (#343A40) |
| Black text | 1.82:1 |
| White text | 11.52:1 |
Values
| HEX | #373B2A |
| RGB | rgb(55, 59, 42) |
| HSL | hsl(74, 17%, 20%) |
| OKLCH | oklch(34.3% 0.029 118.7) |
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 #373B2A | 11.52:1 | AAA | Lc -100.2 | Preferred for body text |
| Black text on #373B2A | 1.82:1 | Fails | Lc 7.3 | Not readable |
| #373B2A text on white | 11.52:1 | AAA | Lc 96.6 | Preferred for body text |
| #373B2A 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
#F5F6F3
oklch(97.2% 0.004 121.6)
-
Step 100
100
#E9EAE6
oklch(93.5% 0.005 117.9)
-
Step 200
200
#D8DAD2
oklch(88.5% 0.011 118)
-
Step 300
300
#BFC3B3
oklch(81% 0.022 118.3)
-
Step 400
400
#9EA48C
oklch(70.7% 0.035 118.7)
-
Step 500
500
#868E6F
oklch(63.2% 0.046 119.5)
-
Step 600
600
#707858
oklch(55.7% 0.048 119.4)
-
Step 700
700
#5E6548
oklch(49.2% 0.045 119.1)
-
Step 800
800
#4D523B
oklch(42.7% 0.037 117.9)
-
Step 900
900 (this color)
#373B2A
oklch(34.3% 0.029 118.7)
-
Step 950
950
#25281E
oklch(27% 0.018 121.2)
#373B2A 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) | #3D3929 | 0.011 |
| Deuteranopia (no green cones) | #3D392B | 0.012 |
| Tritanopia (no blue cones) | #393936 | 0.024 |
| Achromatopsia (no color) | #393939 | 0.029 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #373B2A
#373B2A
oklch(34.3% 0.029 118.7)
- #3B3646
#3B3646
oklch(34.5% 0.028 299.2)
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 #373B2A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.039
- Pakistan Green #283618 ΔE 0.040
- Charcoal Grey #3C4142 ΔE 0.041
- Dark Olive #373E02 ΔE 0.049
- Evergreen #05472A ΔE 0.061
- Gunmetal #293241 ΔE 0.062
- Dark Blue Grey #1F3B4D ΔE 0.066
- Charcoal #264653 ΔE 0.067
Use #373B2A 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.