#423F2C
Closest named color: Charcoal Grey (#3C4142). oklch(36.5% 0.031 100.2), rgb(66, 63, 44).
Aa
White text reads best on this color (10.61:1).
About this color
#423F2C is a dark, muted brown. In OKLCH its lightness is 37%, its chroma 0.031 and its hue 100°. Its hue sits on the warm side of the wheel. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.035 away. White text reads best on it, at 10.61:1.
| Hue family | Browns |
| Lightness | dark (37%) |
| Chroma | muted (0.031) |
| Temperature | warm |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 1.97:1 |
| White text | 10.61:1 |
Values
| HEX | #423F2C |
| RGB | rgb(66, 63, 44) |
| HSL | hsl(52, 20%, 22%) |
| OKLCH | oklch(36.5% 0.031 100.2) |
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 #423F2C | 10.61:1 | AAA | Lc -98.6 | Preferred for body text |
| Black text on #423F2C | 1.97:1 | Fails | Lc 9.3 | Not readable |
| #423F2C text on white | 10.61:1 | AAA | Lc 94.6 | Preferred for body text |
| #423F2C text on black | 1.97:1 | Fails | Lc -8.0 | 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
#F6F5F3
oklch(97% 0.003 84.6)
-
Step 100
100
#EBEAE5
oklch(93.6% 0.007 97.4)
-
Step 200
200
#DBD9D0
oklch(88.4% 0.012 96.4)
-
Step 300
300
#C4C1B0
oklch(80.9% 0.024 98.7)
-
Step 400
400
#A6A287
oklch(70.8% 0.038 100.3)
-
Step 500
500
#908B69
oklch(63.2% 0.049 100.6)
-
Step 600
600
#7A7451
oklch(55.5% 0.051 99.6)
-
Step 700
700
#676242
oklch(49.2% 0.048 100.4)
-
Step 800
800
#545036
oklch(42.8% 0.04 100.5)
-
Step 900
900 (this color)
#423F2C
oklch(36.5% 0.031 100.2)
-
Step 950
950
#28271C
oklch(27% 0.019 103.3)
#423F2C 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) | #433E2B | 0.003 |
| Deuteranopia (no green cones) | #443F2D | 0.004 |
| Tritanopia (no blue cones) | #453C3A | 0.029 |
| Achromatopsia (no color) | #3F3F3F | 0.031 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #423F2C
#423F2C
oklch(36.5% 0.031 100.2)
- #3B3D4F
#3B3D4F
oklch(36.6% 0.031 279.8)
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 #423F2C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.035
- Onyx #343A40 ΔE 0.047
- Dark Olive #373E02 ΔE 0.053
- Pakistan Green #283618 ΔE 0.061
- Dark Slate Gray #2F4F4F ΔE 0.064
- Charcoal #264653 ΔE 0.068
- Mud Brown #60460F ΔE 0.068
- Evergreen #05472A ΔE 0.070
Use #423F2C 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.