#3F302B
Closest named color: Onyx (#343A40). oklch(32.4% 0.024 39.2), rgb(63, 48, 43).
Aa
White text reads best on this color (12.58:1).
About this color
#3F302B is a dark close to neutral grey. In OKLCH its lightness is 32%, its chroma 0.024. It has too little chroma to lean warm or cool. The nearest named color is Onyx (#343A40), ΔE 0.041 away. White text reads best on it, at 12.58:1.
| Hue family | Neutrals |
| Lightness | dark (32%) |
| Chroma | close to neutral grey (0.024) |
| Temperature | neutral |
| Nearest name | Onyx (#343A40) |
| Black text | 1.66:1 |
| White text | 12.58:1 |
Values
| HEX | #3F302B |
| RGB | rgb(63, 48, 43) |
| HSL | hsl(15, 19%, 21%) |
| OKLCH | oklch(32.4% 0.024 39.2) |
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 #3F302B | 12.58:1 | AAA | Lc -101.9 | Preferred for body text |
| Black text on #3F302B | 1.66:1 | Fails | Lc 0.0 | Not readable |
| #3F302B text on white | 12.58:1 | AAA | Lc 98.5 | Preferred for body text |
| #3F302B text on black | 1.66:1 | 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
#F7F5F4
oklch(97.1% 0.003 48.7)
-
Step 100
100
#EDE9E7
oklch(93.7% 0.005 48.7)
-
Step 200
200
#DFD7D4
oklch(88.5% 0.01 41.9)
-
Step 300
300
#CBBDB8
oklch(80.9% 0.017 40.8)
-
Step 400
400
#B19B94
oklch(70.7% 0.028 38.4)
-
Step 500
500
#9E8279
oklch(63% 0.037 38.6)
-
Step 600
600
#886C62
oklch(55.6% 0.039 40.6)
-
Step 700
700
#745A51
oklch(49.1% 0.037 40)
-
Step 800
800
#5E4A43
oklch(42.8% 0.03 40.2)
-
Step 900
900 (this color)
#3F302B
oklch(32.4% 0.024 39.2)
-
Step 950
950
#2D2421
oklch(27% 0.015 39.3)
#3F302B 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) | #34322B | 0.021 |
| Deuteranopia (no green cones) | #37342B | 0.019 |
| Tritanopia (no blue cones) | #432E2F | 0.013 |
| Achromatopsia (no color) | #333333 | 0.024 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F302B
#3F302B
oklch(32.4% 0.024 39.2)
- #26373C
#26373C
oklch(32.4% 0.024 217.9)
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 #3F302B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.041
- Gunmetal #293241 ΔE 0.051
- Charcoal Grey #3C4142 ΔE 0.056
- Space Cadet #2B2D42 ΔE 0.057
- Pakistan Green #283618 ΔE 0.059
- Jet #212529 ΔE 0.070
- Dark Blue Grey #1F3B4D ΔE 0.071
- Chocolate Brown #411900 ΔE 0.073
Use #3F302B 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.