#424C3C
Closest named color: Dark Slate Gray (#2F4F4F). oklch(40.3% 0.029 133.8), rgb(66, 76, 60).
Aa
White text reads best on this color (9.01:1).
About this color
#424C3C is a dark close to neutral grey. In OKLCH its lightness is 40%, its chroma 0.029. It has too little chroma to lean warm or cool. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.035 away. White text reads best on it, at 9.01:1.
| Hue family | Neutrals |
| Lightness | dark (40%) |
| Chroma | close to neutral grey (0.029) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.33:1 |
| White text | 9.01:1 |
Values
| HEX | #424C3C |
| RGB | rgb(66, 76, 60) |
| HSL | hsl(97, 12%, 27%) |
| OKLCH | oklch(40.3% 0.029 133.8) |
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 #424C3C | 9.01:1 | AAA | Lc -95.1 | Preferred for body text |
| Black text on #424C3C | 2.33:1 | Fails | Lc 13.3 | Not readable |
| #424C3C text on white | 9.01:1 | AAA | Lc 90.7 | Preferred for body text |
| #424C3C text on black | 2.33:1 | Fails | Lc -11.6 | 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
#F5F6F4
oklch(97.2% 0.003 128.5)
-
Step 100
100
#E8EAE7
oklch(93.5% 0.005 134.9)
-
Step 200
200
#D7DAD4
oklch(88.4% 0.009 128.6)
-
Step 300
300
#BCC3B8
oklch(80.9% 0.017 133.8)
-
Step 400
400
#9AA593
oklch(70.8% 0.029 133.1)
-
Step 500
500
#818E79
oklch(63% 0.034 133.5)
-
Step 600
600
#6A7862
oklch(55.5% 0.037 134.1)
-
Step 700
700
#596551
oklch(49% 0.034 132.9)
-
Step 800
800 (this color)
#424C3C
oklch(40.3% 0.029 133.8)
-
Step 900
900
#3D4438
oklch(37.6% 0.022 132.2)
-
Step 950
950
#242821
oklch(27% 0.014 131.7)
#424C3C 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) | #4D493B | 0.019 |
| Deuteranopia (no green cones) | #4C493D | 0.018 |
| Tritanopia (no blue cones) | #424B48 | 0.021 |
| Achromatopsia (no color) | #494949 | 0.029 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #424C3C
#424C3C
oklch(40.3% 0.029 133.8)
- #4E4454
#4E4454
oklch(40.3% 0.029 312.8)
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 #424C3C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.035
- Charcoal Grey #3C4142 ΔE 0.042
- Dark Blue Green #005249 ΔE 0.056
- Charcoal #264653 ΔE 0.060
- Dark Teal #014D4E ΔE 0.061
- Mud Brown #60460F ΔE 0.064
- Green Brown #544E03 ΔE 0.064
- Deep Teal #00555A ΔE 0.065
Use #424C3C 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.