#3969AA
Closest named color: French Blue (#436BAD). oklch(51.9% 0.116 256.6), rgb(57, 105, 170).
Aa
White text reads best on this color (5.56:1).
About this color
#3969AA is a medium-dark, moderately saturated blue. In OKLCH its lightness is 52%, its chroma 0.116 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.013 away. White text reads best on it, at 5.56:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.116) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 3.77:1 |
| White text | 5.56:1 |
Values
| HEX | #3969AA |
| RGB | rgb(57, 105, 170) |
| HSL | hsl(215, 50%, 45%) |
| OKLCH | oklch(51.9% 0.116 256.6) |
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 #3969AA | 5.56:1 | AA | Lc -82.9 | Fine for body text |
| Black text on #3969AA | 3.77:1 | AA large text | Lc 26.5 | Dividers and decoration only |
| #3969AA text on white | 5.56:1 | AA | Lc 77.6 | Fine for body text |
| #3969AA 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EBF5
oklch(93.7% 0.016 253.9)
-
Step 200
200
#CCDAEE
oklch(88.4% 0.031 257.2)
-
Step 300
300
#AAC3E5
oklch(81% 0.055 256.1)
-
Step 400
400
#7CA3D8
oklch(70.7% 0.089 256.2)
-
Step 500
500
#5A8BCE
oklch(63.1% 0.115 256.5)
-
Step 600
600
#3F74BB
oklch(55.7% 0.125 256.4)
-
Step 700
700 (this color)
#3969AA
oklch(51.9% 0.116 256.6)
-
Step 800
800
#294F83
oklch(42.7% 0.097 256.8)
-
Step 900
900
#264269
oklch(37.7% 0.075 256.9)
-
Step 950
950
#17273D
oklch(27% 0.047 256.6)
#3969AA 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) | #4C6EAD | 0.027 |
| Deuteranopia (no green cones) | #3C63A9 | 0.017 |
| Tritanopia (no blue cones) | #007881 | 0.094 |
| Achromatopsia (no color) | #686868 | 0.116 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3969AA
#3969AA
oklch(51.9% 0.116 256.6)
- #8B5F00
#8B5F00
oklch(51.9% 0.109 77.2)
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 #3969AA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.013
- Mid Blue #276AB3 ΔE 0.019
- Flat Blue #3C73A8 ΔE 0.030
- Muted Blue #3B719F ΔE 0.032
- Dusky Blue #475F94 ΔE 0.041
- Ocean Blue #03719C ΔE 0.044
- Denim #3B638C ΔE 0.048
- Windows Blue #3778BF ΔE 0.048
Use #3969AA 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.