#3F3F46
Closest named color: Charcoal Grey (#3C4142). oklch(37% 0.012 285.8), rgb(63, 63, 70).
Aa
White text reads best on this color (10.44:1).
About this color
#3F3F46 is a dark close to neutral grey. In OKLCH its lightness is 37%, its chroma 0.012. It has too little chroma to lean warm or cool. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.012 away. White text reads best on it, at 10.44:1.
| Hue family | Neutrals |
| Lightness | dark (37%) |
| Chroma | close to neutral grey (0.012) |
| Temperature | neutral |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 2.01:1 |
| White text | 10.44:1 |
Values
| HEX | #3F3F46 |
| RGB | rgb(63, 63, 70) |
| HSL | hsl(240, 5%, 26%) |
| OKLCH | oklch(37% 0.012 285.8) |
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 #3F3F46 | 10.44:1 | AAA | Lc -98.3 | Preferred for body text |
| Black text on #3F3F46 | 2.01:1 | Fails | Lc 9.7 | Not readable |
| #3F3F46 text on white | 10.44:1 | AAA | Lc 94.3 | Preferred for body text |
| #3F3F46 text on black | 2.01:1 | Fails | Lc -8.3 | 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
#F5F5F6
oklch(97% 0.001 286.4)
-
Step 100
100
#E9E9EB
oklch(93.5% 0.003 286.3)
-
Step 200
200
#D9D9DC
oklch(88.6% 0.004 286.3)
-
Step 300
300
#C0C0C6
oklch(81% 0.008 286.2)
-
Step 400
400
#9F9FA9
oklch(70.6% 0.014 286)
-
Step 500
500
#888894
oklch(63.1% 0.018 285.9)
-
Step 600
600
#72727F
oklch(55.7% 0.02 285.7)
-
Step 700
700
#5F5F6B
oklch(49% 0.019 285.7)
-
Step 800
800
#4E4E57
oklch(42.7% 0.015 285.8)
-
Step 900
900 (this color)
#3F3F46
oklch(37% 0.012 285.8)
-
Step 950
950
#26262A
oklch(27% 0.007 285.9)
#3F3F46 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) | #3D4046 | 0.004 |
| Deuteranopia (no green cones) | #3D3F46 | 0.003 |
| Tritanopia (no blue cones) | #3E4041 | 0.010 |
| Achromatopsia (no color) | #404040 | 0.012 |
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 #3F3F46, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.012
- Onyx #343A40 ΔE 0.026
- Charcoal #264653 ΔE 0.039
- Dark Grey Blue #29465B ΔE 0.044
- Dark Blue Grey #1F3B4D ΔE 0.051
- Dark Slate Gray #2F4F4F ΔE 0.051
- Gunmetal #293241 ΔE 0.058
- Dark Teal #014D4E ΔE 0.066
Use #3F3F46 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.