#566EAD
Closest named color: French Blue (#436BAD). oklch(54.8% 0.103 267.2), rgb(86, 110, 173).
Aa
White text reads best on this color (4.96:1).
About this color
#566EAD is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.103 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.025 away. White text reads best on it, at 4.96:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.103) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.22:1 |
| White text | 4.96:1 |
Values
| HEX | #566EAD |
| RGB | rgb(86, 110, 173) |
| HSL | hsl(223, 35%, 51%) |
| OKLCH | oklch(54.8% 0.103 267.2) |
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 #566EAD | 4.96:1 | AA | Lc -79.7 | Fine for body text |
| Black text on #566EAD | 4.22:1 | AA large text | Lc 29.8 | Dividers and decoration only |
| #566EAD text on white | 4.96:1 | AA | Lc 74.3 | Content text, not long reading |
| #566EAD text on black | 4.22:1 | AA large text | Lc -27.5 | 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
#D1D9EB
oklch(88.5% 0.026 266.6)
-
Step 300
300
#B3C0DF
oklch(80.8% 0.046 267.4)
-
Step 400
400
#8CA0D0
oklch(70.8% 0.074 267)
-
Step 500
500
#7087C3
oklch(63% 0.095 267.6)
-
Step 600
600 (this color)
#566EAD
oklch(54.8% 0.103 267.2)
-
Step 700
700
#485E97
oklch(49.1% 0.096 266.9)
-
Step 800
800
#3B4D7A
oklch(42.7% 0.078 266.6)
-
Step 900
900
#334063
oklch(37.7% 0.063 267.8)
-
Step 950
950
#1E263A
oklch(27.1% 0.039 267.1)
#566EAD 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) | #5674B0 | 0.017 |
| Deuteranopia (no green cones) | #4C6CAC | 0.014 |
| Tritanopia (no blue cones) | #317B85 | 0.092 |
| Achromatopsia (no color) | #707070 | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #566EAD
#566EAD
oklch(54.8% 0.103 267.2)
- #8B6C19
#8B6C19
oklch(54.8% 0.103 86.6)
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 #566EAD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.025
- Flat Blue #3C73A8 ΔE 0.032
- Muted Blue #3B719F ΔE 0.040
- Dull Blue #49759C ΔE 0.040
- Windows Blue #3778BF ΔE 0.042
- Mid Blue #276AB3 ΔE 0.050
- Stormy Blue #507B9C ΔE 0.052
- Cerulean #457B9D ΔE 0.053
Use #566EAD 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.