#4666AF
Closest named color: French Blue (#436BAD). oklch(52.2% 0.121 264.7), rgb(70, 102, 175).
Aa
White text reads best on this color (5.55:1).
About this color
#4666AF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 52%, its chroma 0.121 and its hue 265°. 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 (0.121) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 3.77:1 |
| White text | 5.55:1 |
Values
| HEX | #4666AF |
| RGB | rgb(70, 102, 175) |
| HSL | hsl(222, 43%, 48%) |
| OKLCH | oklch(52.2% 0.121 264.7) |
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 #4666AF | 5.55:1 | AA | Lc -82.9 | Fine for body text |
| Black text on #4666AF | 3.77:1 | AA large text | Lc 26.5 | Dividers and decoration only |
| #4666AF text on white | 5.55:1 | AA | Lc 77.6 | Fine for body text |
| #4666AF text on black | 3.77:1 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E4EAF6
oklch(93.6% 0.017 264.5)
-
Step 200
200
#CFD9EF
oklch(88.4% 0.032 266.1)
-
Step 300
300
#AEC1E8
oklch(81% 0.059 264.6)
-
Step 400
400
#84A0DC
oklch(70.8% 0.094 264.9)
-
Step 500
500
#6587D2
oklch(63.1% 0.12 264.7)
-
Step 600
600
#4D6FBF
oklch(55.5% 0.131 265.1)
-
Step 700
700 (this color)
#4666AF
oklch(52.2% 0.121 264.7)
-
Step 800
800
#334C86
oklch(42.7% 0.101 264.9)
-
Step 900
900
#2D406B
oklch(37.7% 0.078 264.9)
-
Step 950
950
#1A263F
oklch(27.1% 0.05 263.9)
#4666AF 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) | #466DB2 | 0.019 |
| Deuteranopia (no green cones) | #3864AD | 0.017 |
| Tritanopia (no blue cones) | #007682 | 0.105 |
| Achromatopsia (no color) | #686868 | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4666AF
#4666AF
oklch(52.2% 0.121 264.7)
- #866300
#866300
oklch(52.1% 0.107 84.3)
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 #4666AF, 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 0.028
- Flat Blue #3C73A8 ΔE 0.041
- Dusky Blue #475F94 ΔE 0.044
- Muted Blue #3B719F ΔE 0.046
- Windows Blue #3778BF ΔE 0.051
- Denim Blue #3B5B92 ΔE 0.055
- Denim #3B638C ΔE 0.058
Use #4666AF 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.