#566566
Closest named color: Slate (#516572). oklch(49.5% 0.018 201.5), rgb(86, 101, 102).
Aa
White text reads best on this color (6.08:1).
About this color
#566566 is a medium-dark close to neutral grey. In OKLCH its lightness is 49%, its chroma 0.018. It has too little chroma to lean warm or cool. The nearest named color is Slate (#516572), ΔE 0.020 away. White text reads best on it, at 6.08:1.
| Hue family | Neutrals |
| Lightness | medium-dark (49%) |
| Chroma | close to neutral grey (0.018) |
| Temperature | neutral |
| Nearest name | Slate (#516572) |
| Black text | 3.44:1 |
| White text | 6.08:1 |
Values
| HEX | #566566 |
| RGB | rgb(86, 101, 102) |
| HSL | hsl(184, 9%, 37%) |
| OKLCH | oklch(49.5% 0.018 201.5) |
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 #566566 | 6.08:1 | AA | Lc -85.6 | Fine for body text |
| Black text on #566566 | 3.44:1 | AA large text | Lc 23.6 | Dividers and decoration only |
| #566566 text on white | 6.08:1 | AA | Lc 80.4 | Fine for body text |
| #566566 text on black | 3.44:1 | AA large text | Lc -21.4 | 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
#E8EAEA
oklch(93.6% 0.002 197.1)
-
Step 200
200
#D5DADA
oklch(88.5% 0.005 197.1)
-
Step 300
300
#BAC2C3
oklch(80.8% 0.009 205.9)
-
Step 400
400
#97A3A4
oklch(70.6% 0.014 202.9)
-
Step 500
500
#7D8D8E
oklch(63.1% 0.019 201.3)
-
Step 600
600
#667778
oklch(55.6% 0.02 200.9)
-
Step 700
700 (this color)
#566566
oklch(49.5% 0.018 201.5)
-
Step 800
800
#465252
oklch(42.8% 0.015 196.6)
-
Step 900
900
#3B4444
oklch(37.8% 0.012 196.7)
-
Step 950
950
#222828
oklch(27.1% 0.009 196.7)
#566566 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) | #636466 | 0.019 |
| Deuteranopia (no green cones) | #606166 | 0.018 |
| Tritanopia (no blue cones) | #516665 | 0.008 |
| Achromatopsia (no color) | #626262 | 0.018 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #566566
#566566
oklch(49.5% 0.018 201.5)
- #6C5E5D
#6C5E5D
oklch(49.5% 0.018 22.7)
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 #566566, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.020
- Dim Gray #696969 ΔE 0.032
- Dusty Grape #545775 ΔE 0.056
- YInMn Blue #415A77 ΔE 0.058
- Battleship Gray #6C757D ΔE 0.064
- Metallic Blue #4F738E ΔE 0.065
- Dark Aqua #05696B ΔE 0.065
- Dark Green Blue #1F6357 ΔE 0.067
Use #566566 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.