#566CAA
Closest named color: French Blue (#436BAD). oklch(54.2% 0.101 268.1), rgb(86, 108, 170).
Aa
White text reads best on this color (5.09:1).
About this color
#566CAA is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.101 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.023 away. White text reads best on it, at 5.09:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.101) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.12:1 |
| White text | 5.09:1 |
Values
| HEX | #566CAA |
| RGB | rgb(86, 108, 170) |
| HSL | hsl(224, 33%, 50%) |
| OKLCH | oklch(54.2% 0.101 268.1) |
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 #566CAA | 5.09:1 | AA | Lc -80.4 | Fine for body text |
| Black text on #566CAA | 4.12:1 | AA large text | Lc 29.0 | Dividers and decoration only |
| #566CAA text on white | 5.09:1 | AA | Lc 75.1 | Fine for body text |
| #566CAA text on black | 4.12:1 | AA large text | Lc -26.7 | 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 600.
-
Step 50
50
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E6EAF3
oklch(93.7% 0.013 266.7)
-
Step 200
200
#D2D9EA
oklch(88.5% 0.025 267.9)
-
Step 300
300
#B4C0DF
oklch(80.9% 0.046 268.6)
-
Step 400
400
#8D9FCF
oklch(70.6% 0.073 268.5)
-
Step 500
500
#7187C2
oklch(63% 0.093 268)
-
Step 600
600 (this color)
#566CAA
oklch(54.2% 0.101 268.1)
-
Step 700
700
#4A5E96
oklch(49.2% 0.093 268)
-
Step 800
800
#3D4D7A
oklch(42.8% 0.078 268.2)
-
Step 900
900
#344062
oklch(37.7% 0.061 268.6)
-
Step 950
950
#1E2639
oklch(27% 0.037 266.4)
#566CAA 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) | #5472AD | 0.016 |
| Deuteranopia (no green cones) | #4C6BA9 | 0.013 |
| Tritanopia (no blue cones) | #337983 | 0.090 |
| Achromatopsia (no color) | #6E6E6E | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #566CAA
#566CAA
oklch(54.2% 0.101 268.1)
- #876B1A
#876B1A
oklch(54.1% 0.101 88.4)
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 #566CAA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.023
- Flat Blue #3C73A8 ΔE 0.033
- Muted Blue #3B719F ΔE 0.039
- Dull Blue #49759C ΔE 0.041
- Windows Blue #3778BF ΔE 0.047
- Mid Blue #276AB3 ΔE 0.049
- Dusky Blue #475F94 ΔE 0.052
- Stormy Blue #507B9C ΔE 0.054
Use #566CAA 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.