#566A71
Closest named color: Slate (#516572). oklch(51% 0.026 221.1), rgb(86, 106, 113).
Aa
White text reads best on this color (5.68:1).
About this color
#566A71 is a medium-dark close to neutral grey. In OKLCH its lightness is 51%, its chroma 0.026. It has too little chroma to lean warm or cool. The nearest named color is Slate (#516572), ΔE 0.018 away. White text reads best on it, at 5.68:1.
| Hue family | Neutrals |
| Lightness | medium-dark (51%) |
| Chroma | close to neutral grey (0.026) |
| Temperature | neutral |
| Nearest name | Slate (#516572) |
| Black text | 3.69:1 |
| White text | 5.68:1 |
Values
| HEX | #566A71 |
| RGB | rgb(86, 106, 113) |
| HSL | hsl(196, 14%, 39%) |
| OKLCH | oklch(51% 0.026 221.1) |
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 #566A71 | 5.68:1 | AA | Lc -83.7 | Fine for body text |
| Black text on #566A71 | 3.69:1 | AA large text | Lc 25.6 | Dividers and decoration only |
| #566A71 text on white | 5.68:1 | AA | Lc 78.4 | Fine for body text |
| #566A71 text on black | 3.69:1 | AA large text | Lc -23.4 | 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
#E7EAEB
oklch(93.5% 0.004 219.5)
-
Step 200
200
#D4DADC
oklch(88.4% 0.007 219.6)
-
Step 300
300
#B8C3C6
oklch(81% 0.013 215.8)
-
Step 400
400
#93A4AA
oklch(70.7% 0.021 221)
-
Step 500
500
#798D95
oklch(63% 0.026 223.9)
-
Step 600
600
#62777F
oklch(55.5% 0.028 222.9)
-
Step 700
700 (this color)
#566A71
oklch(51% 0.026 221.1)
-
Step 800
800
#425257
oklch(42.7% 0.022 218.7)
-
Step 900
900
#384448
oklch(37.7% 0.017 220)
-
Step 950
950
#21282A
oklch(27.1% 0.011 216.9)
#566A71 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) | #666971 | 0.023 |
| Deuteranopia (no green cones) | #616571 | 0.021 |
| Tritanopia (no blue cones) | #4E6C6C | 0.016 |
| Achromatopsia (no color) | #676767 | 0.027 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #566A71
#566A71
oklch(51% 0.026 221.1)
- #74625B
#74625B
oklch(51.1% 0.026 42.4)
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 #566A71, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.018
- Dim Gray #696969 ΔE 0.028
- Metallic Blue #4F738E ΔE 0.046
- Battleship Gray #6C757D ΔE 0.049
- Dusty Grape #545775 ΔE 0.061
- YInMn Blue #415A77 ΔE 0.062
- Denim #3B638C ΔE 0.063
- Deep Turquoise #017374 ΔE 0.063
Use #566A71 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.