#3963B9#3963B9

#3963B9 is a mid, vivid blue. Relative luminance 0.133; OKLCH L 51.5% C 0.144 H 262.8°. Best body text is #FFFFFF at 5.74:1 contrast (WCAG AA passes).

Color values

HEX	#3963B9
RGB	rgb(57, 99, 185)
HSL	hsl(220, 53%, 47%)
HSV	hsv(220, 69%, 73%)
CMYK	cmyk(69.2%, 46.5%, 0%, 27.5%)
CIE-LAB	lab(43.20, 14.43, -49.79)
CIE-LCH	lch(43.20, 51.84, 286.16°)
OKLab	oklab(51.52% -0.018 -0.1426)
OKLCH	oklch(51.52% 0.144 262.8)
XYZ	xyz(14.9030, 13.2948, 47.6703)
Luminance	0.1330 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3963B9 #B98F39

analogous

#39A3B9 #3963B9 #4F39B9

triadic

#3963B9 #B93963 #63B939

tetradic

#3963B9 #B939A3 #B98F39 #39B94F

square

#3963B9 #B939A3 #B98F39 #39B94F

split-complementary

#3963B9 #B94F39 #A3B939

monochromatic

#1C315B #2B4A8A #3963B9 #6185CE #90A9DD

Accessibility & contrast

On white

5.74

#3963B9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.66

#3963B9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3963B9

5.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3963B9	#FFFFFF	#000000	##FFFFFF
##3963B9	1.00	5.74	3.66	5.74
#FFFFFF	5.74	1.00	21.00	1.00
#000000	3.66	21.00	1.00	21.00
##FFFFFF	5.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#376CBC

Deuteranopia (green-blind)

#1C61B7

Tritanopia (blue-blind)

#007785

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #3963b9;
/* rgb */ color: rgb(57, 99, 185);
/* oklch */ color: oklch(51.5% 0.144 262.8);

Tailwind

colors: {
  custom: {
    50: '#7e8ece',
    500: '#3963b9',
    950: '#000000',
  },
}

SCSS

$custom: #3963b9;
$custom-light: #7e8ece;
$custom-dark: #000000;

JSON

{
  "hex": "#3963b9",
  "rgb": {
    "r": 57,
    "g": 99,
    "b": 185
  },
  "hsl": {
    "h": 220.313,
    "s": 52.893,
    "l": 47.451
  },
  "oklch": {
    "l": 0.51521,
    "c": 0.1437,
    "h": 262.8
  },
  "luminance": 0.13296
}

Semantic roles & 50–950 ramp

primary

#3963B9

secondary

#C8B286

accent

#AD4BDC

background

#F8F8FC

surface

#EFF0F9

border

#CACBD2

text

#0B0C14

muted

#7C7D82

Preview Lab

Preview with #3963B9

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →