#3966A2
Closest named color: French Blue (#436BAD). oklch(50.7% 0.108 256.2), rgb(57, 102, 162).
Aa
White text reads best on this color (5.83:1).
About this color
#3966A2 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.108 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.025 away. White text reads best on it, at 5.83:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 3.59:1 |
| White text | 5.83:1 |
Values
| HEX | #3966A2 |
| RGB | rgb(57, 102, 162) |
| HSL | hsl(214, 48%, 43%) |
| OKLCH | oklch(50.7% 0.108 256.2) |
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 #3966A2 | 5.83:1 | AA | Lc -84.2 | Fine for body text |
| Black text on #3966A2 | 3.59:1 | AA large text | Lc 25.1 | Dividers and decoration only |
| #3966A2 text on white | 5.83:1 | AA | Lc 79.0 | Fine for body text |
| #3966A2 text on black | 3.59:1 | AA large text | Lc -22.8 | 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 700.
-
Step 50
50
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EAF4
oklch(93.5% 0.015 257.2)
-
Step 200
200
#CDDAED
oklch(88.4% 0.03 257.8)
-
Step 300
300
#ABC3E3
oklch(81% 0.052 255.7)
-
Step 400
400
#7EA3D5
oklch(70.7% 0.084 256.1)
-
Step 500
500
#5D8BC9
oklch(63% 0.107 256.2)
-
Step 600
600
#4374B6
oklch(55.6% 0.116 256.4)
-
Step 700
700 (this color)
#3966A2
oklch(50.7% 0.108 256.2)
-
Step 800
800
#2C507F
oklch(42.8% 0.089 255.8)
-
Step 900
900
#284266
oklch(37.6% 0.07 256.8)
-
Step 950
950
#18273C
oklch(27% 0.044 256.9)
#3966A2 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) | #4C6AA4 | 0.025 |
| Deuteranopia (no green cones) | #3D60A1 | 0.017 |
| Tritanopia (no blue cones) | #00747C | 0.089 |
| Achromatopsia (no color) | #656565 | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3966A2
#3966A2
oklch(50.7% 0.108 256.2)
- #875B00
#875B00
oklch(50.6% 0.106 76.2)
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 #3966A2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.025
- Dusky Blue #475F94 ΔE 0.028
- Mid Blue #276AB3 ΔE 0.029
- Muted Blue #3B719F ΔE 0.034
- Denim #3B638C ΔE 0.035
- Denim Blue #3B5B92 ΔE 0.037
- Flat Blue #3C73A8 ΔE 0.038
- Peacock Blue #016795 ΔE 0.040
Use #3966A2 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.