#423F27
Closest named color: Charcoal Grey (#3C4142). oklch(36.4% 0.038 102), rgb(66, 63, 39).
Aa
White text reads best on this color (10.64:1).
About this color
#423F27 is a dark, muted brown. In OKLCH its lightness is 36%, its chroma 0.038 and its hue 102°. Its hue sits on the warm side of the wheel. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.042 away. White text reads best on it, at 10.64:1.
| Hue family | Browns |
| Lightness | dark (36%) |
| Chroma | muted (0.038) |
| Temperature | warm |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 1.97:1 |
| White text | 10.64:1 |
Values
| HEX | #423F27 |
| RGB | rgb(66, 63, 39) |
| HSL | hsl(53, 26%, 21%) |
| OKLCH | oklch(36.4% 0.038 102) |
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 #423F27 | 10.64:1 | AAA | Lc -98.6 | Preferred for body text |
| Black text on #423F27 | 1.97:1 | Fails | Lc 9.2 | Not readable |
| #423F27 text on white | 10.64:1 | AAA | Lc 94.7 | Preferred for body text |
| #423F27 text on black | 1.97:1 | 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
#F6F5F3
oklch(97% 0.003 84.6)
-
Step 100
100
#EBEAE4
oklch(93.6% 0.008 98.9)
-
Step 200
200
#DBDACE
oklch(88.6% 0.016 102.9)
-
Step 300
300
#C4C2AD
oklch(81% 0.029 102.6)
-
Step 400
400
#A6A281
oklch(70.7% 0.046 101.7)
-
Step 500
500
#908B61
oklch(63% 0.059 102.2)
-
Step 600
600
#7B7548
oklch(55.7% 0.064 101.6)
-
Step 700
700
#676239
oklch(49% 0.06 102.3)
-
Step 800
800
#545030
oklch(42.7% 0.049 102.1)
-
Step 900
900 (this color)
#423F27
oklch(36.4% 0.038 102)
-
Step 950
950
#292719
oklch(27% 0.024 101)
#423F27 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) | #433D25 | 0.006 |
| Deuteranopia (no green cones) | #443F28 | 0.004 |
| Tritanopia (no blue cones) | #463C39 | 0.035 |
| Achromatopsia (no color) | #3E3E3E | 0.038 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #423F27
#423F27
oklch(36.4% 0.038 102)
- #3B3C52
#3B3C52
oklch(36.5% 0.038 282.3)
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 #423F27, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.042
- Dark Olive #373E02 ΔE 0.046
- Onyx #343A40 ΔE 0.053
- Pakistan Green #283618 ΔE 0.058
- Mud Brown #60460F ΔE 0.065
- Evergreen #05472A ΔE 0.067
- Dark Slate Gray #2F4F4F ΔE 0.068
- Green Brown #544E03 ΔE 0.072
Use #423F27 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.