#566BB6
Closest named color: French Blue (#436BAD). oklch(54.6% 0.12 270.3), rgb(86, 107, 182).
Aa
White text reads best on this color (5.03:1).
About this color
#566BB6 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.120 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.027 away. White text reads best on it, at 5.03:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.17:1 |
| White text | 5.03:1 |
Values
| HEX | #566BB6 |
| RGB | rgb(86, 107, 182) |
| HSL | hsl(227, 40%, 53%) |
| OKLCH | oklch(54.6% 0.12 270.3) |
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 #566BB6 | 5.03:1 | AA | Lc -80.0 | Fine for body text |
| Black text on #566BB6 | 4.17:1 | AA large text | Lc 29.5 | Dividers and decoration only |
| #566BB6 text on white | 5.03:1 | AA | Lc 74.6 | Content text, not long reading |
| #566BB6 text on black | 4.17:1 | 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
#E6EAF5
oklch(93.7% 0.015 270)
-
Step 200
200
#D1D9EE
oklch(88.6% 0.03 269.1)
-
Step 300
300
#B3C0E4
oklch(81% 0.053 269.6)
-
Step 400
400
#8C9ED7
oklch(70.7% 0.086 270.6)
-
Step 500
500
#7085CC
oklch(63% 0.11 270.5)
-
Step 600
600 (this color)
#566BB6
oklch(54.6% 0.12 270.3)
-
Step 700
700
#495BA0
oklch(49% 0.113 270.8)
-
Step 800
800
#3C4B81
oklch(42.7% 0.092 270.4)
-
Step 900
900
#333F68
oklch(37.7% 0.072 270.3)
-
Step 950
950
#1E253D
oklch(27% 0.046 270.7)
#566BB6 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) | #4C73B9 | 0.023 |
| Deuteranopia (no green cones) | #426BB4 | 0.024 |
| Tritanopia (no blue cones) | #297B88 | 0.106 |
| Achromatopsia (no color) | #6F6F6F | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #566BB6
#566BB6
oklch(54.6% 0.12 270.3)
- #8A6D00
#8A6D00
oklch(54.8% 0.112 90.2)
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 #566BB6, closest first.
No curated palette has a color within ΔE 0.04 of #566BB6.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.027
- Windows Blue #3778BF ΔE 0.043
- Flat Blue #3C73A8 ΔE 0.044
- Mid Blue #276AB3 ΔE 0.047
- Muted Blue #3B719F ΔE 0.053
- Iris #6258C4 ΔE 0.057
- Dull Blue #49759C ΔE 0.057
- Dark Periwinkle #665FD1 ΔE 0.059
Use #566BB6 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.