#4B66AA
Closest named color: French Blue (#436BAD). oklch(52.2% 0.112 266.2), rgb(75, 102, 170).
Aa
White text reads best on this color (5.55:1).
About this color
#4B66AA is a medium-dark, moderately saturated blue. In OKLCH its lightness is 52%, its chroma 0.112 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.015 away. White text reads best on it, at 5.55:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.112) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 3.78:1 |
| White text | 5.55:1 |
Values
| HEX | #4B66AA |
| RGB | rgb(75, 102, 170) |
| HSL | hsl(223, 39%, 48%) |
| OKLCH | oklch(52.2% 0.112 266.2) |
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 #4B66AA | 5.55:1 | AA | Lc -82.9 | Fine for body text |
| Black text on #4B66AA | 3.78:1 | AA large text | Lc 26.5 | Dividers and decoration only |
| #4B66AA text on white | 5.55:1 | AA | Lc 77.6 | Fine for body text |
| #4B66AA text on black | 3.78:1 | AA large text | Lc -24.2 | 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 700.
-
Step 50
50
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF5
oklch(93.6% 0.016 266.3)
-
Step 200
200
#D0D9EE
oklch(88.5% 0.031 267.2)
-
Step 300
300
#B0C0E5
oklch(80.8% 0.055 266.7)
-
Step 400
400
#879FD8
oklch(70.6% 0.088 266.6)
-
Step 500
500
#6A87CD
oklch(63.1% 0.111 266.2)
-
Step 600
600
#5270BA
oklch(55.7% 0.12 266)
-
Step 700
700 (this color)
#4B66AA
oklch(52.2% 0.112 266.2)
-
Step 800
800
#374C82
oklch(42.7% 0.094 266.5)
-
Step 900
900
#2F4068
oklch(37.7% 0.072 265.6)
-
Step 950
950
#1C263D
oklch(27.1% 0.045 265.6)
#4B66AA 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) | #4A6DAD | 0.019 |
| Deuteranopia (no green cones) | #3E64A9 | 0.017 |
| Tritanopia (no blue cones) | #127580 | 0.101 |
| Achromatopsia (no color) | #686868 | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4B66AA
#4B66AA
oklch(52.2% 0.112 266.2)
- #846400
#846400
oklch(52.1% 0.107 86.6)
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 #4B66AA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.015
- Mid Blue #276AB3 ΔE 0.034
- Dusky Blue #475F94 ΔE 0.038
- Flat Blue #3C73A8 ΔE 0.039
- Muted Blue #3B719F ΔE 0.042
- Denim Blue #3B5B92 ΔE 0.052
- Denim #3B638C ΔE 0.053
- Dull Blue #49759C ΔE 0.053
Use #4B66AA 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.