#403F1F
Closest named color: Dark Olive (#373E02). oklch(36% 0.049 107.1), rgb(64, 63, 31).
Aa
White text reads best on this color (10.77:1).
About this color
#403F1F is a dark, muted brown. In OKLCH its lightness is 36%, its chroma 0.049 and its hue 107°. Its hue sits on the warm side of the wheel. The nearest named color is Dark Olive (#373E02), ΔE 0.034 away. White text reads best on it, at 10.77:1.
| Hue family | Browns |
| Lightness | dark (36%) |
| Chroma | muted (0.049) |
| Temperature | warm |
| Nearest name | Dark Olive (#373E02) |
| Black text | 1.94:1 |
| White text | 10.77:1 |
Values
| HEX | #403F1F |
| RGB | rgb(64, 63, 31) |
| HSL | hsl(58, 35%, 19%) |
| OKLCH | oklch(36% 0.049 107.1) |
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 #403F1F | 10.77:1 | AAA | Lc -98.9 | Preferred for body text |
| Black text on #403F1F | 1.94:1 | Fails | Lc 9.0 | Not readable |
| #403F1F text on white | 10.77:1 | AAA | Lc 95.0 | Preferred for body text |
| #403F1F text on black | 1.94:1 | Fails | Lc -7.7 | 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
#F6F6F2
oklch(97.2% 0.005 106.5)
-
Step 100
100
#EAEAE2
oklch(93.5% 0.011 106.6)
-
Step 200
200
#DADACB
oklch(88.4% 0.02 106.8)
-
Step 300
300
#C3C3A8
oklch(81% 0.037 107.2)
-
Step 400
400
#A4A479
oklch(70.8% 0.059 107.8)
-
Step 500
500
#8E8D56
oklch(63.1% 0.075 107.5)
-
Step 600
600
#79773A
oklch(55.7% 0.083 107.1)
-
Step 700
700
#66642C
oklch(49.2% 0.077 107.1)
-
Step 800
800
#535126
oklch(42.6% 0.063 106.4)
-
Step 900
900 (this color)
#403F1F
oklch(36% 0.049 107.1)
-
Step 950
950
#282815
oklch(27.1% 0.032 108.4)
#403F1F 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) | #443D1C | 0.008 |
| Deuteranopia (no green cones) | #443E20 | 0.008 |
| Tritanopia (no blue cones) | #443B37 | 0.044 |
| Achromatopsia (no color) | #3E3E3E | 0.049 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #403F1F
#403F1F
oklch(36% 0.049 107.1)
- #3B3956
#3B3956
oklch(36% 0.05 286.8)
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 #403F1F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Olive #373E02 ΔE 0.034
- Pakistan Green #283618 ΔE 0.053
- Charcoal Grey #3C4142 ΔE 0.053
- Onyx #343A40 ΔE 0.062
- Evergreen #05472A ΔE 0.062
- Mud Brown #60460F ΔE 0.065
- Pine Green #0A481E ΔE 0.065
- Green Brown #544E03 ΔE 0.068
Use #403F1F 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.