#566CA0
Closest named color: French Blue (#436BAD). oklch(53.6% 0.086 266.1), rgb(86, 108, 160).
Aa
White text reads best on this color (5.18:1).
About this color
#566CA0 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.086 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.030 away. White text reads best on it, at 5.18:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.086) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.04:1 |
| White text | 5.18:1 |
Values
| HEX | #566CA0 |
| RGB | rgb(86, 108, 160) |
| HSL | hsl(222, 30%, 48%) |
| OKLCH | oklch(53.6% 0.086 266.1) |
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 #566CA0 | 5.18:1 | AA | Lc -81.0 | Fine for body text |
| Black text on #566CA0 | 4.04:1 | AA large text | Lc 28.4 | Dividers and decoration only |
| #566CA0 text on white | 5.18:1 | AA | Lc 75.6 | Fine for body text |
| #566CA0 text on black | 4.04:1 | AA large text | Lc -26.1 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E6EAF2
oklch(93.6% 0.012 264.5)
-
Step 200
200
#D2D9E8
oklch(88.4% 0.022 265.8)
-
Step 300
300
#B5C1DB
oklch(81% 0.039 265.8)
-
Step 400
400
#8EA0C8
oklch(70.6% 0.062 265.9)
-
Step 500
500
#7388BA
oklch(63% 0.08 266.6)
-
Step 600
600 (this color)
#566CA0
oklch(53.6% 0.086 266.1)
-
Step 700
700
#4B5F8F
oklch(49.1% 0.081 266.2)
-
Step 800
800
#3E4E74
oklch(42.8% 0.067 266.2)
-
Step 900
900
#35415D
oklch(37.7% 0.051 266.2)
-
Step 950
950
#1F2637
oklch(27% 0.033 266.9)
#566CA0 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) | #5970A2 | 0.012 |
| Deuteranopia (no green cones) | #516A9F | 0.009 |
| Tritanopia (no blue cones) | #3A777F | 0.077 |
| Achromatopsia (no color) | #6D6D6D | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #566CA0
#566CA0
oklch(53.6% 0.086 266.1)
- #846A2C
#846A2C
oklch(53.7% 0.086 86.2)
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 #566CA0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.030
- Dull Blue #49759C ΔE 0.031
- Muted Blue #3B719F ΔE 0.031
- Flat Blue #3C73A8 ΔE 0.032
- Metallic Blue #4F738E ΔE 0.041
- Dusky Blue #475F94 ΔE 0.046
- Stormy Blue #507B9C ΔE 0.046
- Cerulean #457B9D ΔE 0.047
Use #566CA0 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.