#424E4C
Closest named color: Dark Slate Gray (#2F4F4F). oklch(41.3% 0.016 184.4), rgb(66, 78, 76).
Aa
White text reads best on this color (8.65:1).
About this color
#424E4C is a dark close to neutral grey. In OKLCH its lightness is 41%, its chroma 0.016. It has too little chroma to lean warm or cool. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.025 away. White text reads best on it, at 8.65:1.
| Hue family | Neutrals |
| Lightness | dark (41%) |
| Chroma | close to neutral grey (0.016) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.42:1 |
| White text | 8.65:1 |
Values
| HEX | #424E4C |
| RGB | rgb(66, 78, 76) |
| HSL | hsl(170, 8%, 28%) |
| OKLCH | oklch(41.3% 0.016 184.4) |
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 #424E4C | 8.65:1 | AAA | Lc -94.2 | Preferred for body text |
| Black text on #424E4C | 2.42:1 | Fails | Lc 14.3 | Not readable |
| #424E4C text on white | 8.65:1 | AAA | Lc 89.7 | Fine for body text |
| #424E4C text on black | 2.42:1 | Fails | Lc -12.5 | 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
#F4F6F5
oklch(97.1% 0.002 165.1)
-
Step 100
100
#E8EAEA
oklch(93.6% 0.002 197.1)
-
Step 200
200
#D6DAD9
oklch(88.5% 0.005 179.7)
-
Step 300
300
#BAC3C1
oklch(81% 0.01 181.3)
-
Step 400
400
#97A4A1
oklch(70.7% 0.015 180.5)
-
Step 500
500
#7E8D8B
oklch(63.1% 0.018 187.1)
-
Step 600
600
#677775
oklch(55.5% 0.019 187.5)
-
Step 700
700
#556462
oklch(49% 0.019 186.8)
-
Step 800
800 (this color)
#424E4C
oklch(41.3% 0.016 184.4)
-
Step 900
900
#3B4442
oklch(37.8% 0.012 180.8)
-
Step 950
950
#222827
oklch(27.1% 0.009 184.6)
#424E4C 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) | #4D4D4C | 0.017 |
| Deuteranopia (no green cones) | #4A4B4C | 0.015 |
| Tritanopia (no blue cones) | #3F4F4D | 0.005 |
| Achromatopsia (no color) | #4B4B4B | 0.016 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #424E4C
#424E4C
oklch(41.3% 0.016 184.4)
- #53484A
#53484A
oklch(41.3% 0.015 5.4)
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 #424E4C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.025
- Charcoal Grey #3C4142 ΔE 0.043
- Charcoal #264653 ΔE 0.050
- Dark Grey Blue #29465B ΔE 0.054
- Deep Teal #00555A ΔE 0.055
- Dark Blue Green #005249 ΔE 0.058
- Dark Teal #014D4E ΔE 0.059
- Dark Green Blue #1F6357 ΔE 0.068
Use #424E4C 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.