#566EA1
Closest named color: Dull Blue (#49759C). oklch(54.1% 0.085 264.5), rgb(86, 110, 161).
Aa
White text reads best on this color (5.07:1).
About this color
#566EA1 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.085 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Dull Blue (#49759C), ΔE 0.027 away. White text reads best on it, at 5.07:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.085) |
| Temperature | cool |
| Nearest name | Dull Blue (#49759C) |
| Black text | 4.14:1 |
| White text | 5.07:1 |
Values
| HEX | #566EA1 |
| RGB | rgb(86, 110, 161) |
| HSL | hsl(221, 30%, 48%) |
| OKLCH | oklch(54.1% 0.085 264.5) |
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 #566EA1 | 5.07:1 | AA | Lc -80.3 | Fine for body text |
| Black text on #566EA1 | 4.14:1 | AA large text | Lc 29.1 | Dividers and decoration only |
| #566EA1 text on white | 5.07:1 | AA | Lc 74.9 | Content text, not long reading |
| #566EA1 text on black | 4.14:1 | AA large text | Lc -26.8 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E6EAF2
oklch(93.6% 0.012 264.5)
-
Step 200
200
#D2D9E8
oklch(88.4% 0.022 265.8)
-
Step 300
300
#B4C1DA
oklch(80.9% 0.038 263.6)
-
Step 400
400
#8EA1C8
oklch(70.8% 0.061 264.5)
-
Step 500
500
#7289BA
oklch(63.1% 0.079 264.8)
-
Step 600
600 (this color)
#566EA1
oklch(54.1% 0.085 264.5)
-
Step 700
700
#4A608E
oklch(49.2% 0.079 264.2)
-
Step 800
800
#3D4E73
oklch(42.6% 0.066 264.9)
-
Step 900
900
#34415D
oklch(37.7% 0.051 264.9)
-
Step 950
950
#1E2636
oklch(26.9% 0.032 263.8)
#566EA1 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) | #5B72A3 | 0.014 |
| Deuteranopia (no green cones) | #536BA0 | 0.010 |
| Tritanopia (no blue cones) | #397980 | 0.077 |
| Achromatopsia (no color) | #6E6E6E | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #566EA1
#566EA1
oklch(54.1% 0.085 264.5)
- #866B2F
#866B2F
oklch(54.2% 0.085 84.9)
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 #566EA1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Blue #49759C ΔE 0.027
- Flat Blue #3C73A8 ΔE 0.029
- Muted Blue #3B719F ΔE 0.030
- French Blue #436BAD ΔE 0.032
- Metallic Blue #4F738E ΔE 0.039
- Stormy Blue #507B9C ΔE 0.041
- Cerulean #457B9D ΔE 0.042
- Dusky Blue #475F94 ΔE 0.051
Use #566EA1 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.