#566BAE
Closest named color: French Blue (#436BAD). oklch(54.2% 0.108 269.4), rgb(86, 107, 174).
Aa
White text reads best on this color (5.10:1).
About this color
#566BAE is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.108 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.022 away. White text reads best on it, at 5.10:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.10:1 |
| White text | 5.10:1 |
Values
| HEX | #566BAE |
| RGB | rgb(86, 107, 174) |
| HSL | hsl(226, 35%, 51%) |
| OKLCH | oklch(54.2% 0.108 269.4) |
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 #566BAE | 5.10:1 | AA | Lc -80.5 | Fine for body text |
| Black text on #566BAE | 4.10:1 | AA large text | Lc 28.9 | Dividers and decoration only |
| #566BAE text on white | 5.10:1 | AA | Lc 75.1 | Fine for body text |
| #566BAE text on black | 4.10:1 | AA large text | Lc -26.6 | 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
#E6EAF4
oklch(93.7% 0.014 268.5)
-
Step 200
200
#D2D9EC
oklch(88.6% 0.027 269.6)
-
Step 300
300
#B4C0E1
oklch(80.9% 0.049 269.5)
-
Step 400
400
#8D9FD2
oklch(70.7% 0.078 269.3)
-
Step 500
500
#7186C6
oklch(63% 0.1 269.5)
-
Step 600
600 (this color)
#566BAE
oklch(54.2% 0.108 269.4)
-
Step 700
700
#4A5D9A
oklch(49.2% 0.101 269.4)
-
Step 800
800
#3D4C7D
oklch(42.7% 0.084 269.7)
-
Step 900
900
#344064
oklch(37.8% 0.064 269.2)
-
Step 950
950
#1E253B
oklch(26.9% 0.042 269.9)
#566BAE 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) | #5172B1 | 0.019 |
| Deuteranopia (no green cones) | #486AAD | 0.018 |
| Tritanopia (no blue cones) | #307984 | 0.096 |
| Achromatopsia (no color) | #6E6E6E | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #566BAE
#566BAE
oklch(54.2% 0.108 269.4)
- #886B09
#886B09
oklch(54.1% 0.108 89.3)
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 #566BAE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.022
- Flat Blue #3C73A8 ΔE 0.037
- Muted Blue #3B719F ΔE 0.044
- Windows Blue #3778BF ΔE 0.046
- Mid Blue #276AB3 ΔE 0.047
- Dull Blue #49759C ΔE 0.047
- Dusky Blue #475F94 ΔE 0.055
- Stormy Blue #507B9C ΔE 0.060
Use #566BAE 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.