#42371B
Closest named color: Dark Olive (#373E02). oklch(34.1% 0.046 88.5), rgb(66, 55, 27).
Aa
White text reads best on this color (11.70:1).
About this color
#42371B is a dark, muted brown. In OKLCH its lightness is 34%, its chroma 0.046 and its hue 88°. Its hue sits on the warm side of the wheel. The nearest named color is Dark Olive (#373E02), ΔE 0.044 away. White text reads best on it, at 11.70:1.
| Hue family | Browns |
| Lightness | dark (34%) |
| Chroma | muted (0.046) |
| Temperature | warm |
| Nearest name | Dark Olive (#373E02) |
| Black text | 1.79:1 |
| White text | 11.70:1 |
Values
| HEX | #42371B |
| RGB | rgb(66, 55, 27) |
| HSL | hsl(43, 42%, 18%) |
| OKLCH | oklch(34.1% 0.046 88.5) |
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 #42371B | 11.70:1 | AAA | Lc -100.5 | Preferred for body text |
| Black text on #42371B | 1.79:1 | Fails | Lc 0.0 | Not readable |
| #42371B text on white | 11.70:1 | AAA | Lc 96.9 | Preferred for body text |
| #42371B text on black | 1.79:1 | 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
#F7F5F2
oklch(97.1% 0.005 78.3)
-
Step 100
100
#ECEAE3
oklch(93.7% 0.01 93.6)
-
Step 200
200
#DED9CB
oklch(88.5% 0.02 90.6)
-
Step 300
300
#CAC0A8
oklch(81% 0.035 88.1)
-
Step 400
400
#AF9F7A
oklch(70.7% 0.054 87.3)
-
Step 500
500
#9B8757
oklch(63% 0.07 87.8)
-
Step 600
600
#86713C
oklch(55.7% 0.076 88.2)
-
Step 700
700
#715E2E
oklch(49% 0.07 88.1)
-
Step 800
800
#5C4D27
oklch(42.6% 0.058 88.3)
-
Step 900
900 (this color)
#42371B
oklch(34.1% 0.046 88.5)
-
Step 950
950
#2C2616
oklch(27.1% 0.029 89.8)
#42371B 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) | #3D3619 | 0.011 |
| Deuteranopia (no green cones) | #3F391C | 0.008 |
| Tritanopia (no blue cones) | #473330 | 0.040 |
| Achromatopsia (no color) | #383838 | 0.046 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42371B
#42371B
oklch(34.1% 0.046 88.5)
- #2E3750
#2E3750
oklch(34% 0.046 268.7)
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 #42371B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Olive #373E02 ΔE 0.044
- Pakistan Green #283618 ΔE 0.046
- Charcoal Grey #3C4142 ΔE 0.058
- Onyx #343A40 ΔE 0.059
- Evergreen #05472A ΔE 0.077
- Mud Brown #60460F ΔE 0.078
- Gunmetal #293241 ΔE 0.080
- Pine Green #0A481E ΔE 0.081
Use #42371B 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.