#424137
Closest named color: Charcoal Grey (#3C4142). oklch(37.3% 0.017 102.5), rgb(66, 65, 55).
Aa
White text reads best on this color (10.27:1).
About this color
#424137 is a dark close to neutral grey. In OKLCH its lightness is 37%, its chroma 0.017. It has too little chroma to lean warm or cool. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.020 away. White text reads best on it, at 10.27:1.
| Hue family | Neutrals |
| Lightness | dark (37%) |
| Chroma | close to neutral grey (0.017) |
| Temperature | neutral |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 2.04:1 |
| White text | 10.27:1 |
Values
| HEX | #424137 |
| RGB | rgb(66, 65, 55) |
| HSL | hsl(55, 9%, 24%) |
| OKLCH | oklch(37.3% 0.017 102.5) |
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 #424137 | 10.27:1 | AAA | Lc -97.9 | Preferred for body text |
| Black text on #424137 | 2.04:1 | Fails | Lc 10.0 | Not readable |
| #424137 text on white | 10.27:1 | AAA | Lc 93.9 | Preferred for body text |
| #424137 text on black | 2.04:1 | Fails | Lc -8.7 | 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
#DAD9D4
oklch(88.5% 0.007 97.4)
-
Step 300
300
#C2C1B8
oklch(80.9% 0.012 101.5)
-
Step 400
400
#A3A193
oklch(70.7% 0.02 100.3)
-
Step 500
500
#8C8A79
oklch(63% 0.025 101.6)
-
Step 600
600
#767462
oklch(55.5% 0.027 102)
-
Step 700
700
#636251
oklch(49.2% 0.026 104.5)
-
Step 800
800
#515042
oklch(42.8% 0.022 103.9)
-
Step 900
900 (this color)
#424137
oklch(37.3% 0.017 102.5)
-
Step 950
950
#272721
oklch(27.1% 0.011 107.1)
#424137 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) | #434036 | 0.003 |
| Deuteranopia (no green cones) | #434137 | 0.002 |
| Tritanopia (no blue cones) | #44403E | 0.014 |
| Achromatopsia (no color) | #414141 | 0.017 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #424137
#424137
oklch(37.3% 0.017 102.5)
- #3F4049
#3F4049
oklch(37.4% 0.015 280.6)
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 #424137, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.020
- Onyx #343A40 ΔE 0.040
- Dark Slate Gray #2F4F4F ΔE 0.052
- Charcoal #264653 ΔE 0.055
- Dark Grey Blue #29465B ΔE 0.064
- Dark Olive #373E02 ΔE 0.068
- Dark Teal #014D4E ΔE 0.068
- Dark Blue Grey #1F3B4D ΔE 0.069
Use #424137 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.