#566979
Closest named color: Slate (#516572). oklch(51.1% 0.034 243.9), rgb(86, 105, 121).
Aa
White text reads best on this color (5.68:1).
About this color
#566979 is a medium-dark, muted blue. In OKLCH its lightness is 51%, its chroma 0.034 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.017 away. White text reads best on it, at 5.68:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | muted (0.034) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.69:1 |
| White text | 5.68:1 |
Values
| HEX | #566979 |
| RGB | rgb(86, 105, 121) |
| HSL | hsl(207, 17%, 41%) |
| OKLCH | oklch(51.1% 0.034 243.9) |
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 #566979 | 5.68:1 | AA | Lc -83.7 | Fine for body text |
| Black text on #566979 | 3.69:1 | AA large text | Lc 25.6 | Dividers and decoration only |
| #566979 text on white | 5.68:1 | AA | Lc 78.4 | Fine for body text |
| #566979 text on black | 3.69:1 | AA large text | Lc -23.3 | 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
#F4F6F7
oklch(97.2% 0.003 228.8)
-
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
#B8C2CB
oklch(80.9% 0.017 245.1)
-
Step 400
400
#93A3B0
oklch(70.7% 0.026 242.5)
-
Step 500
500
#798C9D
oklch(63.1% 0.034 245.4)
-
Step 600
600
#617688
oklch(55.6% 0.037 244.4)
-
Step 700
700 (this color)
#566979
oklch(51.1% 0.034 243.9)
-
Step 800
800
#42515E
oklch(42.7% 0.029 244.7)
-
Step 900
900
#38434D
oklch(37.7% 0.022 245.9)
-
Step 950
950
#21272D
oklch(26.9% 0.014 248.4)
#566979 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) | #63697A | 0.019 |
| Deuteranopia (no green cones) | #5E6579 | 0.016 |
| Tritanopia (no blue cones) | #4C6D6E | 0.028 |
| Achromatopsia (no color) | #676767 | 0.034 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #566979
#566979
oklch(51.1% 0.034 243.9)
- #756352
#756352
oklch(51.2% 0.035 65.3)
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 #566979, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.017
- Dim Gray #696969 ΔE 0.036
- Metallic Blue #4F738E ΔE 0.037
- Battleship Gray #6C757D ΔE 0.050
- Denim #3B638C ΔE 0.052
- Dusty Grape #545775 ΔE 0.054
- YInMn Blue #415A77 ΔE 0.056
- Dull Blue #49759C ΔE 0.057
Use #566979 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.