#566DAD
Closest named color: French Blue (#436BAD). oklch(54.6% 0.104 267.9), rgb(86, 109, 173).
Aa
White text reads best on this color (5.01:1).
About this color
#566DAD is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.104 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.024 away. White text reads best on it, at 5.01:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.104) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.18:1 |
| White text | 5.01:1 |
Values
| HEX | #566DAD |
| RGB | rgb(86, 109, 173) |
| HSL | hsl(224, 35%, 51%) |
| OKLCH | oklch(54.6% 0.104 267.9) |
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 #566DAD | 5.01:1 | AA | Lc -80.0 | Fine for body text |
| Black text on #566DAD | 4.18:1 | AA large text | Lc 29.5 | Dividers and decoration only |
| #566DAD text on white | 5.01:1 | AA | Lc 74.6 | Content text, not long reading |
| #566DAD text on black | 4.18:1 | AA large text | Lc -27.1 | 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E6EAF3
oklch(93.7% 0.013 266.7)
-
Step 200
200
#D2D9EB
oklch(88.5% 0.026 268.8)
-
Step 300
300
#B3C0E0
oklch(80.8% 0.047 267.8)
-
Step 400
400
#8C9FD0
oklch(70.6% 0.075 268)
-
Step 500
500
#7087C4
oklch(63.1% 0.096 267.8)
-
Step 600
600 (this color)
#566DAD
oklch(54.6% 0.104 267.9)
-
Step 700
700
#495E98
oklch(49.2% 0.097 267.7)
-
Step 800
800
#3C4D7B
oklch(42.8% 0.08 267.6)
-
Step 900
900
#334063
oklch(37.7% 0.063 267.8)
-
Step 950
950
#1E263A
oklch(27.1% 0.039 267.1)
#566DAD 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) | #5473B0 | 0.016 |
| Deuteranopia (no green cones) | #4B6CAC | 0.014 |
| Tritanopia (no blue cones) | #317B85 | 0.093 |
| Achromatopsia (no color) | #6F6F6F | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #566DAD
#566DAD
oklch(54.6% 0.104 267.9)
- #8A6C16
#8A6C16
oklch(54.6% 0.104 87.7)
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 #566DAD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.024
- Flat Blue #3C73A8 ΔE 0.033
- Muted Blue #3B719F ΔE 0.041
- Dull Blue #49759C ΔE 0.042
- Windows Blue #3778BF ΔE 0.044
- Mid Blue #276AB3 ΔE 0.049
- Stormy Blue #507B9C ΔE 0.054
- Cerulean #457B9D ΔE 0.055
Use #566DAD 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.