#424E42
Closest named color: Dark Slate Gray (#2F4F4F). oklch(40.9% 0.025 145.1), rgb(66, 78, 66).
Aa
White text reads best on this color (8.74:1).
About this color
#424E42 is a dark close to neutral grey. In OKLCH its lightness is 41%, its chroma 0.025. It has too little chroma to lean warm or cool. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.030 away. White text reads best on it, at 8.74:1.
| Hue family | Neutrals |
| Lightness | dark (41%) |
| Chroma | close to neutral grey (0.025) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.40:1 |
| White text | 8.74:1 |
Values
| HEX | #424E42 |
| RGB | rgb(66, 78, 66) |
| HSL | hsl(120, 8%, 28%) |
| OKLCH | oklch(40.9% 0.025 145.1) |
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 #424E42 | 8.74:1 | AAA | Lc -94.5 | Preferred for body text |
| Black text on #424E42 | 2.40:1 | Fails | Lc 14.0 | Not readable |
| #424E42 text on white | 8.74:1 | AAA | Lc 90.0 | Fine for body text |
| #424E42 text on black | 2.40:1 | Fails | Lc -12.3 | 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 800.
-
Step 50
50
#F5F6F5
oklch(97.2% 0.002 145.6)
-
Step 100
100
#E8EBE8
oklch(93.7% 0.005 145.5)
-
Step 200
200
#D6DBD6
oklch(88.6% 0.009 145.5)
-
Step 300
300
#BBC3BB
oklch(80.9% 0.014 145.4)
-
Step 400
400
#98A598
oklch(70.8% 0.024 145.3)
-
Step 500
500
#7F8F7F
oklch(63.2% 0.03 145.2)
-
Step 600
600
#687968
oklch(55.7% 0.033 145.1)
-
Step 700
700
#566656
oklch(49.2% 0.032 145.1)
-
Step 800
800 (this color)
#424E42
oklch(40.9% 0.025 145.1)
-
Step 900
900
#3B443B
oklch(37.5% 0.019 145.2)
-
Step 950
950
#232823
oklch(27% 0.012 145.2)
#424E42 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) | #4F4C41 | 0.021 |
| Deuteranopia (no green cones) | #4C4A43 | 0.020 |
| Tritanopia (no blue cones) | #414D4B | 0.016 |
| Achromatopsia (no color) | #4B4B4B | 0.025 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #424E42
#424E42
oklch(40.9% 0.025 145.1)
- #514652
#514652
oklch(41% 0.024 323.4)
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 #424E42, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.030
- Charcoal Grey #3C4142 ΔE 0.045
- Dark Blue Green #005249 ΔE 0.055
- Charcoal #264653 ΔE 0.058
- Deep Teal #00555A ΔE 0.060
- Dark Teal #014D4E ΔE 0.060
- Dark Grey Blue #29465B ΔE 0.065
- Pine #2B5D34 ΔE 0.065
Use #424E42 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.