#4C66AF
Closest named color: French Blue (#436BAD). oklch(52.5% 0.119 267.4), rgb(76, 102, 175).
Aa
White text reads best on this color (5.48:1).
About this color
#4C66AF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 53%, its chroma 0.119 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.017 away. White text reads best on it, at 5.48:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 3.82:1 |
| White text | 5.48:1 |
Values
| HEX | #4C66AF |
| RGB | rgb(76, 102, 175) |
| HSL | hsl(224, 39%, 49%) |
| OKLCH | oklch(52.5% 0.119 267.4) |
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 #4C66AF | 5.48:1 | AA | Lc -82.5 | Fine for body text |
| Black text on #4C66AF | 3.82:1 | AA large text | Lc 26.8 | Dividers and decoration only |
| #4C66AF text on white | 5.48:1 | AA | Lc 77.2 | Fine for body text |
| #4C66AF text on black | 3.82:1 | AA large text | Lc -24.5 | 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
#E5EAF5
oklch(93.6% 0.016 266.3)
-
Step 200
200
#D0D9EE
oklch(88.5% 0.031 267.2)
-
Step 300
300
#B1C0E4
oklch(80.8% 0.054 267.4)
-
Step 400
400
#899FD7
oklch(70.7% 0.086 267.6)
-
Step 500
500
#6C86CC
oklch(63% 0.11 267.7)
-
Step 600
600 (this color)
#4C66AF
oklch(52.5% 0.119 267.4)
-
Step 700
700
#455D9F
oklch(49.2% 0.11 267.3)
-
Step 800
800
#394C81
oklch(42.7% 0.091 267.6)
-
Step 900
900
#314068
oklch(37.8% 0.071 267.4)
-
Step 950
950
#1D253D
oklch(26.9% 0.046 269.1)
#4C66AF 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) | #476EB2 | 0.022 |
| Deuteranopia (no green cones) | #3B65AD | 0.020 |
| Tritanopia (no blue cones) | #0D7682 | 0.107 |
| Achromatopsia (no color) | #696969 | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4C66AF
#4C66AF
oklch(52.5% 0.119 267.4)
- #856500
#856500
oklch(52.5% 0.107 86.8)
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 #4C66AF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.017
- Mid Blue #276AB3 ΔE 0.034
- Flat Blue #3C73A8 ΔE 0.042
- Dusky Blue #475F94 ΔE 0.045
- Muted Blue #3B719F ΔE 0.047
- Windows Blue #3778BF ΔE 0.052
- Denim Blue #3B5B92 ΔE 0.058
- Dull Blue #49759C ΔE 0.058
Use #4C66AF 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.