#424B3E
Closest named color: Dark Slate Gray (#2F4F4F). oklch(40.1% 0.024 136), rgb(66, 75, 62).
Aa
White text reads best on this color (9.10:1).
About this color
#424B3E is a dark close to neutral grey. In OKLCH its lightness is 40%, its chroma 0.024. It has too little chroma to lean warm or cool. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.033 away. White text reads best on it, at 9.10:1.
| Hue family | Neutrals |
| Lightness | dark (40%) |
| Chroma | close to neutral grey (0.024) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.30:1 |
| White text | 9.10:1 |
Values
| HEX | #424B3E |
| RGB | rgb(66, 75, 62) |
| HSL | hsl(102, 9%, 27%) |
| OKLCH | oklch(40.1% 0.024 136) |
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 #424B3E | 9.10:1 | AAA | Lc -95.3 | Preferred for body text |
| Black text on #424B3E | 2.30:1 | Fails | Lc 13.0 | Not readable |
| #424B3E text on white | 9.10:1 | AAA | Lc 91.0 | Preferred for body text |
| #424B3E text on black | 2.30:1 | Fails | Lc -11.4 | 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
#F5F6F4
oklch(97.2% 0.003 128.5)
-
Step 100
100
#E8EBE7
oklch(93.7% 0.006 137.8)
-
Step 200
200
#D6DBD4
oklch(88.6% 0.011 136.6)
-
Step 300
300
#BBC3B8
oklch(80.8% 0.018 137)
-
Step 400
400
#99A593
oklch(70.7% 0.029 135)
-
Step 500
500
#808F79
oklch(63.2% 0.037 135.6)
-
Step 600
600
#697961
oklch(55.6% 0.041 135.2)
-
Step 700
700
#576651
oklch(49.1% 0.038 136.8)
-
Step 800
800
#475342
oklch(42.6% 0.031 136.5)
-
Step 900
900 (this color)
#424B3E
oklch(40.1% 0.024 136)
-
Step 950
950
#232821
oklch(26.9% 0.015 136.7)
#424B3E 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) | #4C493D | 0.016 |
| Deuteranopia (no green cones) | #4B483F | 0.017 |
| Tritanopia (no blue cones) | #424A47 | 0.016 |
| Achromatopsia (no color) | #484848 | 0.024 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #424B3E
#424B3E
oklch(40.1% 0.024 136)
- #4D4451
#4D4451
oklch(40.1% 0.024 315.5)
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 #424B3E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.033
- Charcoal Grey #3C4142 ΔE 0.038
- Charcoal #264653 ΔE 0.056
- Dark Blue Green #005249 ΔE 0.057
- Dark Teal #014D4E ΔE 0.060
- Onyx #343A40 ΔE 0.064
- Deep Teal #00555A ΔE 0.064
- Dark Grey Blue #29465B ΔE 0.064
Use #424B3E 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.