#424237
Closest named color: Charcoal Grey (#3C4142). oklch(37.6% 0.018 107.2), rgb(66, 66, 55).
Aa
White text reads best on this color (10.16:1).
About this color
#424237 is a dark close to neutral grey. In OKLCH its lightness is 38%, its chroma 0.018. It has too little chroma to lean warm or cool. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.021 away. White text reads best on it, at 10.16:1.
| Hue family | Neutrals |
| Lightness | dark (38%) |
| Chroma | close to neutral grey (0.018) |
| Temperature | neutral |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 2.06:1 |
| White text | 10.16:1 |
Values
| HEX | #424237 |
| RGB | rgb(66, 66, 55) |
| HSL | hsl(60, 9%, 24%) |
| OKLCH | oklch(37.6% 0.018 107.2) |
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 #424237 | 10.16:1 | AAA | Lc -97.7 | Preferred for body text |
| Black text on #424237 | 2.06:1 | Fails | Lc 10.3 | Not readable |
| #424237 text on white | 10.16:1 | AAA | Lc 93.6 | Preferred for body text |
| #424237 text on black | 2.06:1 | Fails | Lc -8.9 | 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
#F5F5F4
oklch(97% 0.001 106.4)
-
Step 100
100
#EAEAE7
oklch(93.6% 0.004 106.5)
-
Step 200
200
#D9D9D4
oklch(88.4% 0.007 106.5)
-
Step 300
300
#C1C1B7
oklch(80.8% 0.014 106.7)
-
Step 400
400
#A2A292
oklch(70.8% 0.023 107)
-
Step 500
500
#8B8B78
oklch(63.1% 0.028 107.2)
-
Step 600
600
#757561
oklch(55.7% 0.03 107.3)
-
Step 700
700
#626250
oklch(49.1% 0.028 107.4)
-
Step 800
800
#505041
oklch(42.7% 0.024 107.4)
-
Step 900
900 (this color)
#424237
oklch(37.6% 0.018 107.2)
-
Step 950
950
#272720
oklch(27% 0.013 107.2)
#424237 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) | #444136 | 0.004 |
| Deuteranopia (no green cones) | #444237 | 0.003 |
| Tritanopia (no blue cones) | #44413F | 0.015 |
| Achromatopsia (no color) | #414141 | 0.018 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #424237
#424237
oklch(37.6% 0.018 107.2)
- #40404B
#40404B
oklch(37.6% 0.019 285.5)
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 #424237, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.021
- Onyx #343A40 ΔE 0.042
- Dark Slate Gray #2F4F4F ΔE 0.050
- Charcoal #264653 ΔE 0.055
- Dark Grey Blue #29465B ΔE 0.064
- Dark Teal #014D4E ΔE 0.067
- Dark Olive #373E02 ΔE 0.067
- Dark Blue Green #005249 ΔE 0.070
Use #424237 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.