#566ABA
Closest named color: French Blue (#436BAD). oklch(54.7% 0.127 271.1), rgb(86, 106, 186).
Aa
White text reads best on this color (5.04:1).
About this color
#566ABA is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.127 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.032 away. White text reads best on it, at 5.04:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.127) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.16:1 |
| White text | 5.04:1 |
Values
| HEX | #566ABA |
| RGB | rgb(86, 106, 186) |
| HSL | hsl(228, 42%, 53%) |
| OKLCH | oklch(54.7% 0.127 271.1) |
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 #566ABA | 5.04:1 | AA | Lc -80.1 | Fine for body text |
| Black text on #566ABA | 4.16:1 | AA large text | Lc 29.4 | Dividers and decoration only |
| #566ABA text on white | 5.04:1 | AA | Lc 74.7 | Content text, not long reading |
| #566ABA text on black | 4.16:1 | AA large text | Lc -27.0 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E6EAF5
oklch(93.7% 0.015 270)
-
Step 200
200
#D1D9EF
oklch(88.6% 0.031 269.8)
-
Step 300
300
#B3BFE6
oklch(80.8% 0.057 271.7)
-
Step 400
400
#8B9EDA
oklch(70.7% 0.091 270.5)
-
Step 500
500
#7084D0
oklch(63% 0.117 271.5)
-
Step 600
600 (this color)
#566ABA
oklch(54.7% 0.127 271.1)
-
Step 700
700
#495AA3
oklch(49% 0.118 271.6)
-
Step 800
800
#3C4A84
oklch(42.7% 0.098 271.5)
-
Step 900
900
#333E6A
oklch(37.6% 0.077 271.7)
-
Step 950
950
#1E253E
oklch(27.1% 0.048 271.1)
#566ABA 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) | #4873BD | 0.027 |
| Deuteranopia (no green cones) | #3D6BB8 | 0.028 |
| Tritanopia (no blue cones) | #247B89 | 0.112 |
| Achromatopsia (no color) | #6F6F6F | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #566ABA
#566ABA
oklch(54.7% 0.127 271.1)
- #896D00
#896D00
oklch(54.7% 0.112 90.9)
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 #566ABA, closest first.
No curated palette has a color within ΔE 0.04 of #566ABA.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.032
- Windows Blue #3778BF ΔE 0.045
- Mid Blue #276AB3 ΔE 0.049
- Flat Blue #3C73A8 ΔE 0.050
- Iris #6258C4 ΔE 0.051
- Dark Periwinkle #665FD1 ΔE 0.052
- Slate Blue #6A5ACD ΔE 0.058
- Muted Blue #3B719F ΔE 0.059
Use #566ABA 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.