#3F370B
Closest named color: Dark Olive (#373E02). oklch(33.6% 0.061 98.6), rgb(63, 55, 11).
Aa
White text reads best on this color (11.91:1).
About this color
#3F370B is a dark, muted brown. In OKLCH its lightness is 34%, its chroma 0.061 and its hue 99°. Its hue sits on the warm side of the wheel. The nearest named color is Dark Olive (#373E02), ΔE 0.029 away. White text reads best on it, at 11.91:1.
| Hue family | Browns |
| Lightness | dark (34%) |
| Chroma | muted (0.061) |
| Temperature | warm |
| Nearest name | Dark Olive (#373E02) |
| Black text | 1.76:1 |
| White text | 11.91:1 |
Values
| HEX | #3F370B |
| RGB | rgb(63, 55, 11) |
| HSL | hsl(51, 70%, 15%) |
| OKLCH | oklch(33.6% 0.061 98.6) |
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 #3F370B | 11.91:1 | AAA | Lc -100.8 | Preferred for body text |
| Black text on #3F370B | 1.76:1 | Fails | Lc 0.0 | Not readable |
| #3F370B text on white | 11.91:1 | AAA | Lc 97.2 | Preferred for body text |
| #3F370B text on black | 1.76:1 | 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
#F6F6F1
oklch(97.2% 0.007 106.5)
-
Step 100
100
#ECEAE0
oklch(93.6% 0.013 97.4)
-
Step 200
200
#DDDAC7
oklch(88.6% 0.026 99.6)
-
Step 300
300
#C8C2A0
oklch(81% 0.046 99)
-
Step 400
400
#ACA26C
oklch(70.8% 0.073 99)
-
Step 500
500
#988A43
oklch(63.1% 0.093 98.4)
-
Step 600
600
#837420
oklch(55.7% 0.102 98.8)
-
Step 700
700
#6F6111
oklch(49.2% 0.095 98.5)
-
Step 800
800
#5A4F13
oklch(42.7% 0.078 98.5)
-
Step 900
900 (this color)
#3F370B
oklch(33.6% 0.061 98.6)
-
Step 950
950
#2B270F
oklch(27.1% 0.039 100)
#3F370B 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) | #3D3505 | 0.008 |
| Deuteranopia (no green cones) | #3F380E | 0.003 |
| Tritanopia (no blue cones) | #45322E | 0.056 |
| Achromatopsia (no color) | #373737 | 0.061 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F370B
#3F370B
oklch(33.6% 0.061 98.6)
- #303356
#303356
oklch(33.6% 0.061 278.8)
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 #3F370B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Olive #373E02 ΔE 0.029
- Pakistan Green #283618 ΔE 0.040
- Forrest Green #154406 ΔE 0.069
- Hunter Green #0B4008 ΔE 0.071
- Evergreen #05472A ΔE 0.073
- Charcoal Grey #3C4142 ΔE 0.073
- Pine Green #0A481E ΔE 0.073
- Onyx #343A40 ΔE 0.074
Use #3F370B 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.