#3963B3#3963B3

#3963B3 is a mid, vivid blue. Relative luminance 0.130; OKLCH L 51.1% C 0.135 H 261.9°. Best body text is #FFFFFF at 5.82:1 contrast (WCAG AA passes).

Color values

HEX	#3963B3
RGB	rgb(57, 99, 179)
HSL	hsl(219, 52%, 46%)
HSV	hsv(219, 68%, 70%)
CMYK	cmyk(68.2%, 44.7%, 0%, 29.8%)
CIE-LAB	lab(42.83, 12.23, -46.88)
CIE-LCH	lch(42.83, 48.45, 284.62°)
OKLab	oklab(51.12% -0.019 -0.134)
OKLCH	oklch(51.12% 0.135 261.9)
XYZ	xyz(14.2830, 13.0468, 44.4046)
Luminance	0.1305 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3963B3 #B38939

analogous

#39A0B3 #3963B3 #4C39B3

triadic

#3963B3 #B33963 #63B339

tetradic

#3963B3 #B339A0 #B38939 #39B34C

square

#3963B3 #B339A0 #B38939 #39B34C

split-complementary

#3963B3 #B34C39 #A0B339

monochromatic

#1B3056 #2A4985 #3963B3 #5E83CC #8CA7DA

Accessibility & contrast

On white

5.82

#3963B3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.61

#3963B3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3963B3

5.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3963B3	#FFFFFF	#000000	##FFFFFF
##3963B3	1.00	5.82	3.61	5.82
#FFFFFF	5.82	1.00	21.00	1.00
#000000	3.61	21.00	1.00	21.00
##FFFFFF	5.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3C6BB6

Deuteranopia (green-blind)

#2660B1

Tritanopia (blue-blind)

#007582

Achromatopsia (no color)

#656565

Design tokens & code

CSS

--color: #3963b3;
/* rgb */ color: rgb(57, 99, 179);
/* oklch */ color: oklch(51.1% 0.135 261.9);

Tailwind

colors: {
  custom: {
    50: '#7d8eca',
    500: '#3963b3',
    950: '#000000',
  },
}

SCSS

$custom: #3963b3;
$custom-light: #7d8eca;
$custom-dark: #000000;

JSON

{
  "hex": "#3963b3",
  "rgb": {
    "r": 57,
    "g": 99,
    "b": 179
  },
  "hsl": {
    "h": 219.344,
    "s": 51.695,
    "l": 46.275
  },
  "oklch": {
    "l": 0.51117,
    "c": 0.13535,
    "h": 261.9
  },
  "luminance": 0.13048
}

Semantic roles & 50–950 ramp

primary

#3963B3

secondary

#C5AE83

accent

#AA4DDB

background

#F8F8FC

surface

#EFF0F8

border

#CACBD1

text

#0B0C13

muted

#7C7D82

Preview Lab

Preview with #3963B3

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

Preview Lab → · Contrast checker → · Palette generator →