#566779
Closest named color: Slate (#516572). oklch(50.7% 0.035 250), rgb(86, 103, 121).
Aa
White text reads best on this color (5.81:1).
About this color
#566779 is a medium-dark, muted blue. In OKLCH its lightness is 51%, its chroma 0.035 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.014 away. White text reads best on it, at 5.81:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | muted (0.035) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.61:1 |
| White text | 5.81:1 |
Values
| HEX | #566779 |
| RGB | rgb(86, 103, 121) |
| HSL | hsl(211, 17%, 41%) |
| OKLCH | oklch(50.7% 0.035 250) |
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 #566779 | 5.81:1 | AA | Lc -84.3 | Fine for body text |
| Black text on #566779 | 3.61:1 | AA large text | Lc 25.0 | Dividers and decoration only |
| #566779 text on white | 5.81:1 | AA | Lc 79.1 | Fine for body text |
| #566779 text on black | 3.61:1 | AA large text | Lc -22.7 | 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
#F4F5F7
oklch(97% 0.003 264.5)
-
Step 100
100
#E7EAED
oklch(93.6% 0.005 247.9)
-
Step 200
200
#D4DADF
oklch(88.5% 0.009 242.9)
-
Step 300
300
#B9C2CC
oklch(81% 0.017 250.9)
-
Step 400
400
#94A2B1
oklch(70.6% 0.027 250.1)
-
Step 500
500
#7A8C9E
oklch(63.2% 0.034 248.4)
-
Step 600
600
#637589
oklch(55.5% 0.038 251.2)
-
Step 700
700 (this color)
#566779
oklch(50.7% 0.035 250)
-
Step 800
800
#43505F
oklch(42.6% 0.03 252.2)
-
Step 900
900
#39434E
oklch(37.8% 0.023 250.9)
-
Step 950
950
#21272D
oklch(26.9% 0.014 248.4)
#566779 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) | #60677A | 0.014 |
| Deuteranopia (no green cones) | #5C6479 | 0.012 |
| Tritanopia (no blue cones) | #4C6B6D | 0.030 |
| Achromatopsia (no color) | #656565 | 0.035 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #566779
#566779
oklch(50.7% 0.035 250)
- #73624F
#73624F
oklch(50.7% 0.036 70)
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 #566779, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.014
- Dim Gray #696969 ΔE 0.038
- Metallic Blue #4F738E ΔE 0.041
- Dusty Grape #545775 ΔE 0.048
- Denim #3B638C ΔE 0.048
- YInMn Blue #415A77 ΔE 0.051
- Battleship Gray #6C757D ΔE 0.054
- Dusky Blue #475F94 ΔE 0.059
Use #566779 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.