#424B43
Closest named color: Dark Slate Gray (#2F4F4F). oklch(40.2% 0.018 148.4), rgb(66, 75, 67).
Aa
White text reads best on this color (9.05:1).
About this color
#424B43 is a dark close to neutral grey. In OKLCH its lightness is 40%, its chroma 0.018. 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 9.05:1.
| Hue family | Neutrals |
| Lightness | dark (40%) |
| Chroma | close to neutral grey (0.018) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.31:1 |
| White text | 9.05:1 |
Values
| HEX | #424B43 |
| RGB | rgb(66, 75, 67) |
| HSL | hsl(127, 6%, 28%) |
| OKLCH | oklch(40.2% 0.018 148.4) |
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 #424B43 | 9.05:1 | AAA | Lc -95.2 | Preferred for body text |
| Black text on #424B43 | 2.31:1 | Fails | Lc 13.1 | Not readable |
| #424B43 text on white | 9.05:1 | AAA | Lc 90.8 | Preferred for body text |
| #424B43 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 800.
-
Step 50
50
#F5F6F5
oklch(97.2% 0.002 145.6)
-
Step 100
100
#E8EAE9
oklch(93.5% 0.003 165.1)
-
Step 200
200
#D7DAD7
oklch(88.5% 0.005 145.5)
-
Step 300
300
#BCC2BD
oklch(80.8% 0.01 150.7)
-
Step 400
400
#9AA49B
oklch(70.8% 0.017 148.3)
-
Step 500
500
#818D82
oklch(63% 0.021 147.7)
-
Step 600
600
#6B776C
oklch(55.6% 0.022 147.6)
-
Step 700
700
#59645A
oklch(49.1% 0.021 147.8)
-
Step 800
800 (this color)
#424B43
oklch(40.2% 0.018 148.4)
-
Step 900
900
#3D443E
oklch(37.8% 0.014 149.5)
-
Step 950
950
#242824
oklch(27.1% 0.009 145.3)
#424B43 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) | #4B4943 | 0.015 |
| Deuteranopia (no green cones) | #4A4843 | 0.015 |
| Tritanopia (no blue cones) | #414B49 | 0.010 |
| Achromatopsia (no color) | #494949 | 0.018 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #424B43
#424B43
oklch(40.2% 0.018 148.4)
- #4E454D
#4E454D
oklch(40.2% 0.018 329.4)
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 #424B43, 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 0.035
- Charcoal #264653 ΔE 0.051
- Dark Blue Green #005249 ΔE 0.057
- Dark Grey Blue #29465B ΔE 0.058
- Dark Teal #014D4E ΔE 0.058
- Deep Teal #00555A ΔE 0.061
- Onyx #343A40 ΔE 0.062
Use #424B43 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.