#4566BB
Closest named color: French Blue (#436BAD). oklch(52.9% 0.139 265.9), rgb(69, 102, 187).
Aa
White text reads best on this color (5.42:1).
About this color
#4566BB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 53%, its chroma 0.139 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.028 away. White text reads best on it, at 5.42:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.139) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 3.87:1 |
| White text | 5.42:1 |
Values
| HEX | #4566BB |
| RGB | rgb(69, 102, 187) |
| HSL | hsl(223, 46%, 50%) |
| OKLCH | oklch(52.9% 0.139 265.9) |
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 #4566BB | 5.42:1 | AA | Lc -82.1 | Fine for body text |
| Black text on #4566BB | 3.87:1 | AA large text | Lc 27.3 | Dividers and decoration only |
| #4566BB text on white | 5.42:1 | AA | Lc 76.8 | Fine for body text |
| #4566BB text on black | 3.87:1 | AA large text | Lc -24.9 | 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
#E4EAF6
oklch(93.6% 0.017 264.5)
-
Step 200
200
#CED9F1
oklch(88.4% 0.035 266)
-
Step 300
300
#AEC0EA
oklch(80.8% 0.063 266.8)
-
Step 400
400
#839FDF
oklch(70.6% 0.099 265.8)
-
Step 500
500
#6586D7
oklch(63.1% 0.128 266.1)
-
Step 600
600 (this color)
#4566BB
oklch(52.9% 0.139 265.9)
-
Step 700
700
#3E5CA9
oklch(49.2% 0.128 265.9)
-
Step 800
800
#334B89
oklch(42.6% 0.107 266.1)
-
Step 900
900
#2C3F6E
oklch(37.6% 0.084 265.9)
-
Step 950
950
#1A2540
oklch(26.9% 0.053 266.2)
#4566BB 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) | #3D70BE | 0.027 |
| Deuteranopia (no green cones) | #2A65B9 | 0.026 |
| Tritanopia (no blue cones) | #007987 | 0.117 |
| Achromatopsia (no color) | #6A6A6A | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4566BB
#4566BB
oklch(52.9% 0.139 265.9)
- #876600
#876600
oklch(52.9% 0.108 86.3)
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 #4566BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.028
- Mid Blue #276AB3 ΔE 0.031
- Windows Blue #3778BF ΔE 0.048
- Iris #6258C4 ΔE 0.052
- Flat Blue #3C73A8 ΔE 0.052
- Dark Periwinkle #665FD1 ΔE 0.058
- Royal Blue #4169E1 ΔE 0.058
- Muted Blue #3B719F ΔE 0.060
Use #4566BB 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.