#42524A
Closest named color: Dark Slate Gray (#2F4F4F). oklch(42.2% 0.024 163.6), rgb(66, 82, 74).
Aa
White text reads best on this color (8.27:1).
About this color
#42524A is a dark close to neutral grey. In OKLCH its lightness is 42%, its chroma 0.024. It has too little chroma to lean warm or cool. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.029 away. White text reads best on it, at 8.27:1.
| Hue family | Neutrals |
| Lightness | dark (42%) |
| Chroma | close to neutral grey (0.024) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.53:1 |
| White text | 8.27:1 |
Values
| HEX | #42524A |
| RGB | rgb(66, 82, 74) |
| HSL | hsl(150, 11%, 29%) |
| OKLCH | oklch(42.2% 0.024 163.6) |
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 #42524A | 8.27:1 | AAA | Lc -93.2 | Preferred for body text |
| Black text on #42524A | 2.53:1 | Fails | Lc 15.4 | Dividers and decoration only |
| #42524A text on white | 8.27:1 | AAA | Lc 88.6 | Fine for body text |
| #42524A text on black | 2.53:1 | Fails | Lc -13.6 | 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
#F4F6F5
oklch(97.1% 0.002 165.1)
-
Step 100
100
#E7EBE9
oklch(93.6% 0.005 165)
-
Step 200
200
#D5DBD8
oklch(88.6% 0.008 164.9)
-
Step 300
300
#B9C4BE
oklch(81% 0.015 162.4)
-
Step 400
400
#95A59D
oklch(70.7% 0.021 164.3)
-
Step 500
500
#7A8F85
oklch(63% 0.028 165.1)
-
Step 600
600
#63796E
oklch(55.5% 0.031 163.6)
-
Step 700
700
#52665C
oklch(49.1% 0.029 163.5)
-
Step 800
800 (this color)
#42524A
oklch(42.2% 0.024 163.6)
-
Step 900
900
#39453F
oklch(37.8% 0.019 163.8)
-
Step 950
950
#212825
oklch(26.9% 0.011 167.8)
#42524A 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) | #51504A | 0.023 |
| Deuteranopia (no green cones) | #4E4E4A | 0.021 |
| Tritanopia (no blue cones) | #3F5250 | 0.010 |
| Achromatopsia (no color) | #4E4E4E | 0.024 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42524A
#42524A
oklch(42.2% 0.024 163.6)
- #584951
#584951
oklch(42.3% 0.024 344.8)
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 #42524A, 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
- Deep Teal #00555A ΔE 0.054
- Charcoal Grey #3C4142 ΔE 0.055
- Dark Blue Green #005249 ΔE 0.056
- Dark Green Blue #1F6357 ΔE 0.057
- Charcoal #264653 ΔE 0.061
- Dark Teal #014D4E ΔE 0.062
- Pine #2B5D34 ΔE 0.064
Use #42524A 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.