#3F4331
Closest named color: Charcoal Grey (#3C4142). oklch(37.4% 0.03 118), rgb(63, 67, 49).
Aa
White text reads best on this color (10.20:1).
About this color
#3F4331 is a dark close to neutral grey. In OKLCH its lightness is 37%, its chroma 0.030. It has too little chroma to lean warm or cool. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.031 away. White text reads best on it, at 10.20:1.
| Hue family | Neutrals |
| Lightness | dark (37%) |
| Chroma | close to neutral grey (0.030) |
| Temperature | neutral |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 2.05:1 |
| White text | 10.20:1 |
Values
| HEX | #3F4331 |
| RGB | rgb(63, 67, 49) |
| HSL | hsl(73, 16%, 23%) |
| OKLCH | oklch(37.4% 0.03 118) |
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 #3F4331 | 10.20:1 | AAA | Lc -97.8 | Preferred for body text |
| Black text on #3F4331 | 2.05:1 | Fails | Lc 10.2 | Not readable |
| #3F4331 text on white | 10.20:1 | AAA | Lc 93.7 | Preferred for body text |
| #3F4331 text on black | 2.05:1 | Fails | Lc -8.8 | 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
#D8DAD1
oklch(88.4% 0.012 116.8)
-
Step 300
300
#BFC3B3
oklch(81% 0.022 118.3)
-
Step 400
400
#9EA48B
oklch(70.7% 0.036 118.3)
-
Step 500
500
#878E6E
oklch(63.2% 0.047 117.8)
-
Step 600
600
#707856
oklch(55.7% 0.051 118.8)
-
Step 700
700
#5E6546
oklch(49.2% 0.048 118.5)
-
Step 800
800
#4D523A
oklch(42.7% 0.038 117.6)
-
Step 900
900 (this color)
#3F4331
oklch(37.4% 0.03 118)
-
Step 950
950
#25281D
oklch(27% 0.02 120.1)
#3F4331 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) | #454130 | 0.011 |
| Deuteranopia (no green cones) | #454132 | 0.012 |
| Tritanopia (no blue cones) | #41413E | 0.025 |
| Achromatopsia (no color) | #414141 | 0.030 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F4331
#3F4331
oklch(37.4% 0.03 118)
- #423D4F
#423D4F
oklch(37.2% 0.031 297.6)
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 #3F4331, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.031
- Onyx #343A40 ΔE 0.049
- Dark Slate Gray #2F4F4F ΔE 0.052
- Dark Olive #373E02 ΔE 0.056
- Charcoal #264653 ΔE 0.060
- Evergreen #05472A ΔE 0.064
- Dark Teal #014D4E ΔE 0.066
- Pakistan Green #283618 ΔE 0.066
Use #3F4331 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.