#424337
Closest named color: Charcoal Grey (#3C4142). oklch(37.8% 0.02 111.2), rgb(66, 67, 55).
Aa
White text reads best on this color (10.04:1).
About this color
#424337 is a dark close to neutral grey. In OKLCH its lightness is 38%, its chroma 0.020. It has too little chroma to lean warm or cool. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.023 away. White text reads best on it, at 10.04:1.
| Hue family | Neutrals |
| Lightness | dark (38%) |
| Chroma | close to neutral grey (0.020) |
| Temperature | neutral |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 2.08:1 |
| White text | 10.04:1 |
Values
| HEX | #424337 |
| RGB | rgb(66, 67, 55) |
| HSL | hsl(65, 10%, 24%) |
| OKLCH | oklch(37.8% 0.02 111.2) |
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 #424337 | 10.04:1 | AAA | Lc -97.5 | Preferred for body text |
| Black text on #424337 | 2.08:1 | Fails | Lc 10.6 | Not readable |
| #424337 text on white | 10.04:1 | AAA | Lc 93.3 | Preferred for body text |
| #424337 text on black | 2.08:1 | Fails | Lc -9.1 | 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
#D9DAD4
oklch(88.6% 0.008 114.2)
-
Step 300
300
#C1C2B7
oklch(81% 0.015 110.9)
-
Step 400
400
#A1A292
oklch(70.7% 0.023 109.9)
-
Step 500
500
#8A8C77
oklch(63.2% 0.031 111.7)
-
Step 600
600
#74755F
oklch(55.5% 0.033 109.6)
-
Step 700
700
#61634F
oklch(49.2% 0.031 112.2)
-
Step 800
800
#4F5041
oklch(42.6% 0.024 110.5)
-
Step 900
900 (this color)
#424337
oklch(37.8% 0.02 111.2)
-
Step 950
950
#262720
oklch(26.9% 0.013 113.9)
#424337 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) | #454236 | 0.005 |
| Deuteranopia (no green cones) | #454237 | 0.006 |
| Tritanopia (no blue cones) | #444140 | 0.019 |
| Achromatopsia (no color) | #424242 | 0.020 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #424337
#424337
oklch(37.8% 0.02 111.2)
- #42404C
#42404C
oklch(37.8% 0.02 293)
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 #424337, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.023
- Onyx #343A40 ΔE 0.045
- Dark Slate Gray #2F4F4F ΔE 0.048
- Charcoal #264653 ΔE 0.055
- Dark Grey Blue #29465B ΔE 0.065
- Dark Teal #014D4E ΔE 0.066
- Dark Olive #373E02 ΔE 0.067
- Dark Blue Green #005249 ΔE 0.068
Use #424337 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.