#566E77
Closest named color: Slate (#516572). oklch(52.2% 0.032 222.8), rgb(86, 110, 119).
Aa
White text reads best on this color (5.39:1).
About this color
#566E77 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 52%, its chroma 0.032 and its hue 223°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.028 away. White text reads best on it, at 5.39:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (52%) |
| Chroma | muted (0.032) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.89:1 |
| White text | 5.39:1 |
Values
| HEX | #566E77 |
| RGB | rgb(86, 110, 119) |
| HSL | hsl(196, 16%, 40%) |
| OKLCH | oklch(52.2% 0.032 222.8) |
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 #566E77 | 5.39:1 | AA | Lc -82.2 | Fine for body text |
| Black text on #566E77 | 3.89:1 | AA large text | Lc 27.2 | Dividers and decoration only |
| #566E77 text on white | 5.39:1 | AA | Lc 76.9 | Fine for body text |
| #566E77 text on black | 3.89:1 | AA large text | Lc -24.9 | 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
#E7EAEC
oklch(93.5% 0.004 236.5)
-
Step 200
200
#D3DADD
oklch(88.4% 0.009 225.1)
-
Step 300
300
#B7C3C8
oklch(80.9% 0.015 224.5)
-
Step 400
400
#91A4AC
oklch(70.6% 0.024 225)
-
Step 500
500
#758E97
oklch(63% 0.032 221.7)
-
Step 600
600
#5E7882
oklch(55.6% 0.034 223.4)
-
Step 700
700 (this color)
#566E77
oklch(52.2% 0.032 222.8)
-
Step 800
800
#40525A
oklch(42.6% 0.026 226.8)
-
Step 900
900
#36444A
oklch(37.7% 0.021 225.8)
-
Step 950
950
#20282B
oklch(27% 0.013 222.5)
#566E77 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) | #696D78 | 0.027 |
| Deuteranopia (no green cones) | #646877 | 0.025 |
| Tritanopia (no blue cones) | #4C7171 | 0.020 |
| Achromatopsia (no color) | #6A6A6A | 0.032 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #566E77
#566E77
oklch(52.2% 0.032 222.8)
- #7A645B
#7A645B
oklch(52.2% 0.032 43.4)
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 #566E77, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.028
- Dim Gray #696969 ΔE 0.032
- Metallic Blue #4F738E ΔE 0.035
- Battleship Gray #6C757D ΔE 0.039
- Battleship Grey #6B7C85 ΔE 0.054
- Grey Blue #647D8E ΔE 0.055
- Dull Blue #49759C ΔE 0.057
- Deep Aqua #08787F ΔE 0.059
Use #566E77 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.