#3F442F
Closest named color: Charcoal Grey (#3C4142). oklch(37.6% 0.035 119), rgb(63, 68, 47).
Aa
White text reads best on this color (10.09:1).
About this color
#3F442F is a dark, muted brown. In OKLCH its lightness is 38%, its chroma 0.035 and its hue 119°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.036 away. White text reads best on it, at 10.09:1.
| Hue family | Browns |
| Lightness | dark (38%) |
| Chroma | muted (0.035) |
| Temperature | in between |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 2.07:1 |
| White text | 10.09:1 |
Values
| HEX | #3F442F |
| RGB | rgb(63, 68, 47) |
| HSL | hsl(74, 18%, 23%) |
| OKLCH | oklch(37.6% 0.035 119) |
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 #3F442F | 10.09:1 | AAA | Lc -97.5 | Preferred for body text |
| Black text on #3F442F | 2.07:1 | Fails | Lc 10.5 | Not readable |
| #3F442F text on white | 10.09:1 | AAA | Lc 93.5 | Preferred for body text |
| #3F442F text on black | 2.07:1 | Fails | Lc -9.1 | 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
#E9EBE5
oklch(93.7% 0.008 121.6)
-
Step 200
200
#D8DBD0
oklch(88.6% 0.015 119.1)
-
Step 300
300
#BEC3B1
oklch(80.8% 0.025 119.6)
-
Step 400
400
#9DA588
oklch(70.8% 0.042 120)
-
Step 500
500
#868E6A
oklch(63% 0.052 118.1)
-
Step 600
600
#6F7851
oklch(55.5% 0.058 118.9)
-
Step 700
700
#5D6542
oklch(49% 0.054 118.9)
-
Step 800
800
#4C5337
oklch(42.8% 0.045 119.7)
-
Step 900
900 (this color)
#3F442F
oklch(37.6% 0.035 119)
-
Step 950
950
#25281C
oklch(27% 0.022 119.3)
#3F442F 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) | #47422E | 0.014 |
| Deuteranopia (no green cones) | #464230 | 0.013 |
| Tritanopia (no blue cones) | #41423E | 0.028 |
| Achromatopsia (no color) | #424242 | 0.035 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F442F
#3F442F
oklch(37.6% 0.035 119)
- #443D51
#443D51
oklch(37.5% 0.035 300.7)
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 #3F442F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.036
- Dark Slate Gray #2F4F4F ΔE 0.053
- Dark Olive #373E02 ΔE 0.053
- Onyx #343A40 ΔE 0.054
- Evergreen #05472A ΔE 0.062
- Charcoal #264653 ΔE 0.063
- Mud Brown #60460F ΔE 0.065
- Dark Blue Green #005249 ΔE 0.065
Use #3F442F 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.