#424A39
Closest named color: Dark Slate Gray (#2F4F4F). oklch(39.7% 0.03 128.2), rgb(66, 74, 57).
Aa
White text reads best on this color (9.25:1).
About this color
#424A39 is a dark close to neutral grey. In OKLCH its lightness is 40%, its chroma 0.030. It has too little chroma to lean warm or cool. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.039 away. White text reads best on it, at 9.25:1.
| Hue family | Neutrals |
| Lightness | dark (40%) |
| Chroma | close to neutral grey (0.030) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.27:1 |
| White text | 9.25:1 |
Values
| HEX | #424A39 |
| RGB | rgb(66, 74, 57) |
| HSL | hsl(88, 13%, 26%) |
| OKLCH | oklch(39.7% 0.03 128.2) |
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 #424A39 | 9.25:1 | AAA | Lc -95.7 | Preferred for body text |
| Black text on #424A39 | 2.27:1 | Fails | Lc 12.6 | Not readable |
| #424A39 text on white | 9.25:1 | AAA | Lc 91.3 | Preferred for body text |
| #424A39 text on black | 2.27:1 | Fails | Lc -11.0 | 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
#E8EBE6
oklch(93.6% 0.007 132.4)
-
Step 200
200
#D7DBD2
oklch(88.6% 0.013 126.4)
-
Step 300
300
#BCC4B5
oklch(81% 0.022 130.1)
-
Step 400
400
#9AA58E
oklch(70.7% 0.035 128.2)
-
Step 500
500
#818F72
oklch(63.1% 0.045 128.6)
-
Step 600
600
#6B795A
oklch(55.6% 0.049 127.7)
-
Step 700
700
#59664A
oklch(49.1% 0.046 128.2)
-
Step 800
800
#49533D
oklch(42.7% 0.037 127.8)
-
Step 900
900 (this color)
#424A39
oklch(39.7% 0.03 128.2)
-
Step 950
950
#24281F
oklch(27% 0.017 127.1)
#424A39 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) | #4C4838 | 0.017 |
| Deuteranopia (no green cones) | #4B473A | 0.017 |
| Tritanopia (no blue cones) | #434845 | 0.023 |
| Achromatopsia (no color) | #474747 | 0.030 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #424A39
#424A39
oklch(39.7% 0.03 128.2)
- #4B4353
#4B4353
oklch(39.7% 0.028 307.7)
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 #424A39, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.039
- Charcoal Grey #3C4142 ΔE 0.039
- Dark Blue Green #005249 ΔE 0.058
- Charcoal #264653 ΔE 0.060
- Dark Teal #014D4E ΔE 0.062
- Mud Brown #60460F ΔE 0.063
- Onyx #343A40 ΔE 0.064
- Green Brown #544E03 ΔE 0.064
Use #424A39 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.