#3F401B
Closest named color: Dark Olive (#373E02). oklch(36.1% 0.056 110.3), rgb(63, 64, 27).
Aa
White text reads best on this color (10.71:1).
About this color
#3F401B is a dark, muted brown. In OKLCH its lightness is 36%, its chroma 0.056 and its hue 110°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Olive (#373E02), ΔE 0.028 away. White text reads best on it, at 10.71:1.
| Hue family | Browns |
| Lightness | dark (36%) |
| Chroma | muted (0.056) |
| Temperature | in between |
| Nearest name | Dark Olive (#373E02) |
| Black text | 1.96:1 |
| White text | 10.71:1 |
Values
| HEX | #3F401B |
| RGB | rgb(63, 64, 27) |
| HSL | hsl(62, 41%, 18%) |
| OKLCH | oklch(36.1% 0.056 110.3) |
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 #3F401B | 10.71:1 | AAA | Lc -98.7 | Preferred for body text |
| Black text on #3F401B | 1.96:1 | Fails | Lc 9.1 | Not readable |
| #3F401B text on white | 10.71:1 | AAA | Lc 94.8 | Preferred for body text |
| #3F401B text on black | 1.96:1 | Fails | Lc -7.8 | 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
#F5F6F2
oklch(97.1% 0.005 117.9)
-
Step 100
100
#EAEBE2
oklch(93.7% 0.012 111.8)
-
Step 200
200
#D9DBC9
oklch(88.5% 0.024 112)
-
Step 300
300
#C2C3A5
oklch(80.8% 0.041 108.8)
-
Step 400
400
#A2A574
oklch(70.7% 0.067 110.9)
-
Step 500
500
#8C8E4F
oklch(63% 0.085 110.2)
-
Step 600
600
#767832
oklch(55.6% 0.093 110.6)
-
Step 700
700
#646524
oklch(49.2% 0.087 110)
-
Step 800
800
#515220
oklch(42.6% 0.071 110.1)
-
Step 900
900 (this color)
#3F401B
oklch(36.1% 0.056 110.3)
-
Step 950
950
#272813
oklch(27% 0.035 110.9)
#3F401B 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) | #453D18 | 0.013 |
| Deuteranopia (no green cones) | #453E1D | 0.013 |
| Tritanopia (no blue cones) | #433C38 | 0.051 |
| Achromatopsia (no color) | #3E3E3E | 0.056 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F401B
#3F401B
oklch(36.1% 0.056 110.3)
- #3D3859
#3D3859
oklch(36.1% 0.056 290.2)
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 #3F401B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Olive #373E02 ΔE 0.028
- Pakistan Green #283618 ΔE 0.053
- Charcoal Grey #3C4142 ΔE 0.058
- Evergreen #05472A ΔE 0.059
- Pine Green #0A481E ΔE 0.061
- Forrest Green #154406 ΔE 0.064
- Green Brown #544E03 ΔE 0.064
- Mud Brown #60460F ΔE 0.064
Use #3F401B 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.