#566AAE
Closest named color: French Blue (#436BAD). oklch(54% 0.109 270.1), rgb(86, 106, 174).
Aa
White text reads best on this color (5.16:1).
About this color
#566AAE is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.109 and its hue 270°. 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 5.16:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.06:1 |
| White text | 5.16:1 |
Values
| HEX | #566AAE |
| RGB | rgb(86, 106, 174) |
| HSL | hsl(226, 35%, 51%) |
| OKLCH | oklch(54% 0.109 270.1) |
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 #566AAE | 5.16:1 | AA | Lc -80.8 | Fine for body text |
| Black text on #566AAE | 4.06:1 | AA large text | Lc 28.6 | Dividers and decoration only |
| #566AAE text on white | 5.16:1 | AA | Lc 75.4 | Fine for body text |
| #566AAE text on black | 4.06:1 | AA large text | Lc -26.3 | 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
#7286C7
oklch(63.1% 0.101 270.3)
-
Step 600
600 (this color)
#566AAE
oklch(54% 0.109 270.1)
-
Step 700
700
#4A5C9A
oklch(49% 0.102 270.1)
-
Step 800
800
#3D4C7D
oklch(42.7% 0.084 269.7)
-
Step 900
900
#343F65
oklch(37.6% 0.067 270.7)
-
Step 950
950
#1E253B
oklch(26.9% 0.042 269.9)
#566AAE 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) | #4F71B1 | 0.020 |
| Deuteranopia (no green cones) | #466AAC | 0.020 |
| Tritanopia (no blue cones) | #307883 | 0.098 |
| Achromatopsia (no color) | #6D6D6D | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #566AAE
#566AAE
oklch(54% 0.109 270.1)
- #876B03
#876B03
oklch(54% 0.109 90.4)
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 #566AAE, 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 0.039
- Muted Blue #3B719F ΔE 0.045
- Mid Blue #276AB3 ΔE 0.047
- Windows Blue #3778BF ΔE 0.048
- Dull Blue #49759C ΔE 0.049
- Dusky Blue #475F94 ΔE 0.053
- Stormy Blue #507B9C ΔE 0.063
Use #566AAE 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.