#566A69
Closest named color: Slate (#516572). oklch(50.8% 0.024 192.7), rgb(86, 106, 105).
Aa
White text reads best on this color (5.73:1).
About this color
#566A69 is a medium-dark close to neutral grey. In OKLCH its lightness is 51%, its chroma 0.024. It has too little chroma to lean warm or cool. The nearest named color is Slate (#516572), ΔE 0.025 away. White text reads best on it, at 5.73:1.
| Hue family | Neutrals |
| Lightness | medium-dark (51%) |
| Chroma | close to neutral grey (0.024) |
| Temperature | neutral |
| Nearest name | Slate (#516572) |
| Black text | 3.66:1 |
| White text | 5.73:1 |
Values
| HEX | #566A69 |
| RGB | rgb(86, 106, 105) |
| HSL | hsl(177, 10%, 38%) |
| OKLCH | oklch(50.8% 0.024 192.7) |
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 #566A69 | 5.73:1 | AA | Lc -84.0 | Fine for body text |
| Black text on #566A69 | 3.66:1 | AA large text | Lc 25.4 | Dividers and decoration only |
| #566A69 text on white | 5.73:1 | AA | Lc 78.7 | Fine for body text |
| #566A69 text on black | 3.66:1 | AA large text | Lc -23.1 | Dividers and decoration only |
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 700.
-
Step 50
50
#F4F6F6
oklch(97.2% 0.002 197.1)
-
Step 100
100
#E7EAEA
oklch(93.5% 0.003 197.1)
-
Step 200
200
#D4DADA
oklch(88.4% 0.007 197)
-
Step 300
300
#B9C3C2
oklch(80.9% 0.011 189.8)
-
Step 400
400
#94A4A4
oklch(70.6% 0.018 196.8)
-
Step 500
500
#7A8E8D
oklch(63.1% 0.023 192.9)
-
Step 600
600
#627877
oklch(55.5% 0.026 193)
-
Step 700
700 (this color)
#566A69
oklch(50.8% 0.024 192.7)
-
Step 800
800
#435352
oklch(42.8% 0.02 191.8)
-
Step 900
900
#384444
oklch(37.6% 0.016 196.5)
-
Step 950
950
#212828
oklch(27% 0.01 196.6)
#566A69 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) | #676869 | 0.025 |
| Deuteranopia (no green cones) | #636569 | 0.023 |
| Tritanopia (no blue cones) | #506B6A | 0.008 |
| Achromatopsia (no color) | #666666 | 0.024 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #566A69
#566A69
oklch(50.8% 0.024 192.7)
- #736061
#736061
oklch(50.8% 0.025 14.4)
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 #566A69, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.025
- Dim Gray #696969 ΔE 0.027
- Battleship Gray #6C757D ΔE 0.053
- Metallic Blue #4F738E ΔE 0.057
- Deep Turquoise #017374 ΔE 0.062
- Dark Aquamarine #017371 ΔE 0.062
- Deep Aqua #08787F ΔE 0.065
- Dark Aqua #05696B ΔE 0.065
Use #566A69 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.