#333D39
Closest named color: Onyx (#343A40). oklch(34.9% 0.015 169.3), rgb(51, 61, 57).
Aa
White text reads best on this color (11.24:1).
About this color
#333D39 is a dark close to neutral grey. In OKLCH its lightness is 35%, its chroma 0.015. It has too little chroma to lean warm or cool. The nearest named color is Onyx (#343A40), ΔE 0.019 away. White text reads best on it, at 11.24:1.
| Hue family | Neutrals |
| Lightness | dark (35%) |
| Chroma | close to neutral grey (0.015) |
| Temperature | neutral |
| Nearest name | Onyx (#343A40) |
| Black text | 1.86:1 |
| White text | 11.24:1 |
Values
| HEX | #333D39 |
| RGB | rgb(51, 61, 57) |
| HSL | hsl(156, 9%, 22%) |
| OKLCH | oklch(34.9% 0.015 169.3) |
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 #333D39 | 11.24:1 | AAA | Lc -99.7 | Preferred for body text |
| Black text on #333D39 | 1.86:1 | Fails | Lc 7.9 | Not readable |
| #333D39 text on white | 11.24:1 | AAA | Lc 96.0 | Preferred for body text |
| #333D39 text on black | 1.86:1 | 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
#F4F6F5
oklch(97.1% 0.002 165.1)
-
Step 100
100
#E8EAE9
oklch(93.5% 0.003 165.1)
-
Step 200
200
#D5DAD8
oklch(88.4% 0.006 170.4)
-
Step 300
300
#BAC3BF
oklch(80.9% 0.011 167.7)
-
Step 400
400
#96A49F
oklch(70.6% 0.017 172.4)
-
Step 500
500
#7D8E87
oklch(63.1% 0.022 168.9)
-
Step 600
600
#667871
oklch(55.6% 0.024 170)
-
Step 700
700
#54655E
oklch(49% 0.023 168.5)
-
Step 800
800
#45534D
oklch(42.8% 0.02 167.6)
-
Step 900
900 (this color)
#333D39
oklch(34.9% 0.015 169.3)
-
Step 950
950
#222826
oklch(27% 0.009 173.5)
#333D39 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) | #3C3C39 | 0.015 |
| Deuteranopia (no green cones) | #3A3A39 | 0.014 |
| Tritanopia (no blue cones) | #313D3C | 0.006 |
| Achromatopsia (no color) | #3B3B3B | 0.015 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
This color is close to neutral, so it has no meaningful hue to rotate. Hue harmonies are omitted.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #333D39, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.019
- Charcoal Grey #3C4142 ΔE 0.024
- Dark Blue Grey #1F3B4D ΔE 0.045
- Charcoal #264653 ΔE 0.046
- Gunmetal #293241 ΔE 0.048
- Midnight Green #073B4C ΔE 0.056
- Pakistan Green #283618 ΔE 0.057
- Dark Grey Blue #29465B ΔE 0.057
Use #333D39 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.