#423F25
Closest named color: Dark Olive (#373E02). oklch(36.3% 0.041 102.5), rgb(66, 63, 37).
Aa
White text reads best on this color (10.66:1).
About this color
#423F25 is a dark, muted brown. In OKLCH its lightness is 36%, its chroma 0.041 and its hue 103°. Its hue sits on the warm side of the wheel. The nearest named color is Dark Olive (#373E02), ΔE 0.043 away. White text reads best on it, at 10.66:1.
| Hue family | Browns |
| Lightness | dark (36%) |
| Chroma | muted (0.041) |
| Temperature | warm |
| Nearest name | Dark Olive (#373E02) |
| Black text | 1.96:1 |
| White text | 10.66:1 |
Values
| HEX | #423F25 |
| RGB | rgb(66, 63, 37) |
| HSL | hsl(54, 28%, 20%) |
| OKLCH | oklch(36.3% 0.041 102.5) |
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 #423F25 | 10.66:1 | AAA | Lc -98.7 | Preferred for body text |
| Black text on #423F25 | 1.96:1 | Fails | Lc 9.2 | Not readable |
| #423F25 text on white | 10.66:1 | AAA | Lc 94.7 | Preferred for body text |
| #423F25 text on black | 1.96:1 | Fails | Lc -7.9 | 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
#EBEAE3
oklch(93.6% 0.009 100)
-
Step 200
200
#DBDACD
oklch(88.6% 0.018 103.2)
-
Step 300
300
#C4C2AB
oklch(80.9% 0.032 103)
-
Step 400
400
#A6A27F
oklch(70.6% 0.049 102.1)
-
Step 500
500
#908B5E
oklch(63% 0.063 102.6)
-
Step 600
600
#7B7544
oklch(55.6% 0.069 102.3)
-
Step 700
700
#676236
oklch(49% 0.063 102.7)
-
Step 800
800
#54502D
oklch(42.6% 0.053 102.7)
-
Step 900
900 (this color)
#423F25
oklch(36.3% 0.041 102.5)
-
Step 950
950
#292718
oklch(27% 0.026 101.5)
#423F25 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) | #433D23 | 0.006 |
| Deuteranopia (no green cones) | #443F26 | 0.004 |
| Tritanopia (no blue cones) | #463C39 | 0.038 |
| Achromatopsia (no color) | #3E3E3E | 0.041 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #423F25
#423F25
oklch(36.3% 0.041 102.5)
- #3B3B53
#3B3B53
oklch(36.3% 0.041 284.2)
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 #423F25, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Olive #373E02 ΔE 0.043
- Charcoal Grey #3C4142 ΔE 0.045
- Onyx #343A40 ΔE 0.056
- Pakistan Green #283618 ΔE 0.057
- Mud Brown #60460F ΔE 0.064
- Evergreen #05472A ΔE 0.067
- Dark Slate Gray #2F4F4F ΔE 0.070
- Green Brown #544E03 ΔE 0.070
Use #423F25 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.