#424B42
Closest named color: Dark Slate Gray (#2F4F4F). oklch(40.2% 0.019 145.2), rgb(66, 75, 66).
Aa
White text reads best on this color (9.06:1).
About this color
#424B42 is a dark close to neutral grey. In OKLCH its lightness is 40%, its chroma 0.019. 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 9.06:1.
| Hue family | Neutrals |
| Lightness | dark (40%) |
| Chroma | close to neutral grey (0.019) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.31:1 |
| White text | 9.06:1 |
Values
| HEX | #424B42 |
| RGB | rgb(66, 75, 66) |
| HSL | hsl(120, 6%, 28%) |
| OKLCH | oklch(40.2% 0.019 145.2) |
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 #424B42 | 9.06:1 | AAA | Lc -95.2 | Preferred for body text |
| Black text on #424B42 | 2.31:1 | Fails | Lc 13.1 | Not readable |
| #424B42 text on white | 9.06:1 | AAA | Lc 90.9 | Preferred for body text |
| #424B42 text on black | 2.31:1 | Fails | Lc -11.5 | 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 900.
-
Step 50
50
#F5F6F5
oklch(97.2% 0.002 145.6)
-
Step 100
100
#E8EAE8
oklch(93.5% 0.003 145.5)
-
Step 200
200
#D6DAD6
oklch(88.4% 0.007 145.5)
-
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
#7F8E7F
oklch(63% 0.028 145.2)
-
Step 600
600
#687868
oklch(55.5% 0.031 145.1)
-
Step 700
700
#576557
oklch(49% 0.028 145.1)
-
Step 800
800
#475347
oklch(42.8% 0.025 145.1)
-
Step 900
900 (this color)
#424B42
oklch(40.2% 0.019 145.2)
-
Step 950
950
#232823
oklch(27% 0.012 145.2)
#424B42 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) | #4B4942 | 0.015 |
| Deuteranopia (no green cones) | #4A4842 | 0.015 |
| Tritanopia (no blue cones) | #414A48 | 0.012 |
| Achromatopsia (no color) | #494949 | 0.019 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #424B42
#424B42
oklch(40.2% 0.019 145.2)
- #4E454E
#4E454E
oklch(40.3% 0.019 325.9)
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 #424B42, 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 0.035
- Charcoal #264653 ΔE 0.052
- Dark Blue Green #005249 ΔE 0.057
- Dark Teal #014D4E ΔE 0.058
- Dark Grey Blue #29465B ΔE 0.059
- Deep Teal #00555A ΔE 0.062
- Onyx #343A40 ΔE 0.062
Use #424B42 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.