#424C43
Closest named color: Dark Slate Gray (#2F4F4F). oklch(40.5% 0.02 148), rgb(66, 76, 67).
Aa
White text reads best on this color (8.94:1).
About this color
#424C43 is a dark close to neutral grey. In OKLCH its lightness is 40%, its chroma 0.020. It has too little chroma to lean warm or cool. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.029 away. White text reads best on it, at 8.94:1.
| Hue family | Neutrals |
| Lightness | dark (40%) |
| Chroma | close to neutral grey (0.020) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.34:1 |
| White text | 8.94:1 |
Values
| HEX | #424C43 |
| RGB | rgb(66, 76, 67) |
| HSL | hsl(126, 7%, 28%) |
| OKLCH | oklch(40.5% 0.02 148) |
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 #424C43 | 8.94:1 | AAA | Lc -95.0 | Preferred for body text |
| Black text on #424C43 | 2.34:1 | Fails | Lc 13.4 | Not readable |
| #424C43 text on white | 8.94:1 | AAA | Lc 90.5 | Preferred for body text |
| #424C43 text on black | 2.34:1 | Fails | Lc -11.8 | 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
#E8EAE8
oklch(93.5% 0.003 145.5)
-
Step 200
200
#D6DAD7
oklch(88.4% 0.006 153.8)
-
Step 300
300
#BCC3BC
oklch(81% 0.012 145.5)
-
Step 400
400
#99A49A
oklch(70.7% 0.019 148)
-
Step 500
500
#808E82
oklch(63.2% 0.024 149.5)
-
Step 600
600
#6A786B
oklch(55.7% 0.026 147.2)
-
Step 700
700
#586559
oklch(49.2% 0.025 147.3)
-
Step 800
800 (this color)
#424C43
oklch(40.5% 0.02 148)
-
Step 900
900
#3C443D
oklch(37.7% 0.016 148.9)
-
Step 950
950
#232824
oklch(27% 0.01 151.4)
#424C43 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) | #4C4A43 | 0.017 |
| Deuteranopia (no green cones) | #4B4943 | 0.016 |
| Tritanopia (no blue cones) | #414B49 | 0.012 |
| Achromatopsia (no color) | #494949 | 0.020 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #424C43
#424C43
oklch(40.5% 0.02 148)
- #4F454E
#4F454E
oklch(40.4% 0.02 329.1)
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 #424C43, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.029
- Charcoal Grey #3C4142 ΔE 0.038
- Charcoal #264653 ΔE 0.053
- Dark Blue Green #005249 ΔE 0.056
- Dark Teal #014D4E ΔE 0.058
- Dark Grey Blue #29465B ΔE 0.060
- Deep Teal #00555A ΔE 0.060
- Onyx #343A40 ΔE 0.065
Use #424C43 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.