#42391F
Closest named color: Dark Olive (#373E02). oklch(34.7% 0.042 91), rgb(66, 57, 31).
Aa
White text reads best on this color (11.43:1).
About this color
#42391F is a dark, muted brown. In OKLCH its lightness is 35%, its chroma 0.042 and its hue 91°. 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 11.43:1.
| Hue family | Browns |
| Lightness | dark (35%) |
| Chroma | muted (0.042) |
| Temperature | warm |
| Nearest name | Dark Olive (#373E02) |
| Black text | 1.83:1 |
| White text | 11.43:1 |
Values
| HEX | #42391F |
| RGB | rgb(66, 57, 31) |
| HSL | hsl(45, 36%, 19%) |
| OKLCH | oklch(34.7% 0.042 91) |
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 #42391F | 11.43:1 | AAA | Lc -100.0 | Preferred for body text |
| Black text on #42391F | 1.83:1 | Fails | Lc 7.6 | Not readable |
| #42391F text on white | 11.43:1 | AAA | Lc 96.3 | Preferred for body text |
| #42391F text on black | 1.83:1 | 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
#F6F5F2
oklch(97% 0.004 91.4)
-
Step 100
100
#ECEAE3
oklch(93.7% 0.01 93.6)
-
Step 200
200
#DDD9CC
oklch(88.5% 0.018 92.7)
-
Step 300
300
#C8C0AA
oklch(80.8% 0.031 90.4)
-
Step 400
400
#ACA07D
oklch(70.7% 0.05 91.4)
-
Step 500
500
#98885B
oklch(63% 0.065 90.7)
-
Step 600
600
#837241
oklch(55.7% 0.071 90.9)
-
Step 700
700
#6F5F33
oklch(49.1% 0.065 89.9)
-
Step 800
800
#5A4E2B
oklch(42.7% 0.054 91.1)
-
Step 900
900 (this color)
#42391F
oklch(34.7% 0.042 91)
-
Step 950
950
#2B2617
oklch(27% 0.027 91.8)
#42391F 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) | #3E381D | 0.009 |
| Deuteranopia (no green cones) | #413B20 | 0.006 |
| Tritanopia (no blue cones) | #473533 | 0.040 |
| Achromatopsia (no color) | #3A3A3A | 0.043 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42391F
#42391F
oklch(34.7% 0.042 91)
- #313950
#313950
oklch(34.8% 0.042 269.4)
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 #42391F, 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 0.048
- Charcoal Grey #3C4142 ΔE 0.052
- Onyx #343A40 ΔE 0.055
- Evergreen #05472A ΔE 0.074
- Mud Brown #60460F ΔE 0.074
- Gunmetal #293241 ΔE 0.079
- Pine Green #0A481E ΔE 0.079
Use #42391F 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.