#42544E
Closest named color: Dark Slate Gray (#2F4F4F). oklch(42.9% 0.024 172.8), rgb(66, 84, 78).
Aa
White text reads best on this color (8.04:1).
About this color
#42544E is a dark close to neutral grey. In OKLCH its lightness is 43%, its chroma 0.024. It has too little chroma to lean warm or cool. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.031 away. White text reads best on it, at 8.04:1.
| Hue family | Neutrals |
| Lightness | dark (43%) |
| Chroma | close to neutral grey (0.024) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.60:1 |
| White text | 8.04:1 |
Values
| HEX | #42544E |
| RGB | rgb(66, 84, 78) |
| HSL | hsl(160, 12%, 29%) |
| OKLCH | oklch(42.9% 0.024 172.8) |
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 #42544E | 8.04:1 | AAA | Lc -92.5 | Preferred for body text |
| Black text on #42544E | 2.60:1 | Fails | Lc 16.1 | Dividers and decoration only |
| #42544E text on white | 8.04:1 | AAA | Lc 87.9 | Fine for body text |
| #42544E text on black | 2.60:1 | Fails | Lc -14.3 | 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
#D4DBD8
oklch(88.5% 0.009 168.7)
-
Step 300
300
#B8C4C0
oklch(81% 0.014 174.1)
-
Step 400
400
#93A59F
oklch(70.6% 0.022 173.6)
-
Step 500
500
#789088
oklch(63.2% 0.03 173.1)
-
Step 600
600
#617A71
oklch(55.7% 0.032 171.2)
-
Step 700
700
#50665F
oklch(49% 0.029 173.7)
-
Step 800
800 (this color)
#42544E
oklch(42.9% 0.024 172.8)
-
Step 900
900
#384540
oklch(37.7% 0.019 170)
-
Step 950
950
#212826
oklch(26.9% 0.011 176.4)
#42544E 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) | #53524E | 0.026 |
| Deuteranopia (no green cones) | #4F4F4E | 0.024 |
| Tritanopia (no blue cones) | #3E5452 | 0.008 |
| Achromatopsia (no color) | #505050 | 0.025 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42544E
#42544E
oklch(42.9% 0.024 172.8)
- #5B4A51
#5B4A51
oklch(42.9% 0.025 351.5)
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 #42544E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.031
- Dark Green Blue #1F6357 ΔE 0.052
- Deep Teal #00555A ΔE 0.053
- Dark Blue Green #005249 ΔE 0.058
- Petrol #005F6A ΔE 0.060
- Charcoal Grey #3C4142 ΔE 0.061
- Charcoal #264653 ΔE 0.064
- Dark Teal #014D4E ΔE 0.064
Use #42544E 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.