#3F4F44
Closest named color: Dark Slate Gray (#2F4F4F). oklch(41% 0.027 155), rgb(63, 79, 68).
Aa
White text reads best on this color (8.70:1).
About this color
#3F4F44 is a dark close to neutral grey. In OKLCH its lightness is 41%, its chroma 0.027. It has too little chroma to lean warm or cool. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.026 away. White text reads best on it, at 8.70:1.
| Hue family | Neutrals |
| Lightness | dark (41%) |
| Chroma | close to neutral grey (0.027) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.41:1 |
| White text | 8.70:1 |
Values
| HEX | #3F4F44 |
| RGB | rgb(63, 79, 68) |
| HSL | hsl(139, 11%, 28%) |
| OKLCH | oklch(41% 0.027 155) |
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 #3F4F44 | 8.70:1 | AAA | Lc -94.3 | Preferred for body text |
| Black text on #3F4F44 | 2.41:1 | Fails | Lc 14.1 | Not readable |
| #3F4F44 text on white | 8.70:1 | AAA | Lc 89.8 | Fine for body text |
| #3F4F44 text on black | 2.41:1 | Fails | Lc -12.4 | 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 800.
-
Step 50
50
#F4F6F5
oklch(97.1% 0.002 165.1)
-
Step 100
100
#E7EBE8
oklch(93.6% 0.006 153.8)
-
Step 200
200
#D5DBD6
oklch(88.5% 0.009 150.7)
-
Step 300
300
#B9C4BC
oklch(80.9% 0.016 154.4)
-
Step 400
400
#95A69A
oklch(70.8% 0.026 154.9)
-
Step 500
500
#7B9081
oklch(63.2% 0.033 154.3)
-
Step 600
600
#637A6A
oklch(55.6% 0.036 154.7)
-
Step 700
700
#526659
oklch(49% 0.032 156.5)
-
Step 800
800 (this color)
#3F4F44
oklch(41% 0.027 155)
-
Step 900
900
#39453D
oklch(37.7% 0.021 156.1)
-
Step 950
950
#212824
oklch(26.8% 0.012 160.4)
#3F4F44 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) | #4F4C43 | 0.025 |
| Deuteranopia (no green cones) | #4C4A45 | 0.025 |
| Tritanopia (no blue cones) | #3D4F4C | 0.013 |
| Achromatopsia (no color) | #4B4B4B | 0.027 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F4F44
#3F4F44
oklch(41% 0.027 155)
- #544550
#544550
oklch(41% 0.027 335.6)
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 #3F4F44, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.026
- Charcoal Grey #3C4142 ΔE 0.046
- Dark Blue Green #005249 ΔE 0.051
- Deep Teal #00555A ΔE 0.055
- Charcoal #264653 ΔE 0.056
- Dark Teal #014D4E ΔE 0.056
- Dark Grey Blue #29465B ΔE 0.063
- Pine #2B5D34 ΔE 0.063
Use #3F4F44 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.