#3951D1#3951D1

#3951D1 is a mid, vivid blue. Relative luminance 0.114; OKLCH L 49.8% C 0.198 H 269.5°. Best body text is #FFFFFF at 6.42:1 contrast (WCAG AA passes).

Color values

HEX	#3951D1
RGB	rgb(57, 81, 209)
HSL	hsl(231, 62%, 52%)
HSV	hsv(231, 73%, 82%)
CMYK	cmyk(72.7%, 61.2%, 0%, 18%)
CIE-LAB	lab(40.17, 34.72, -68.61)
CIE-LCH	lch(40.17, 76.89, 296.84°)
OKLab	oklab(49.78% -0.0017 -0.1982)
OKLCH	oklch(49.78% 0.198 269.5)
XYZ	xyz(16.1344, 11.3565, 61.6509)
Luminance	0.1136 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3951D1 #D1B939

analogous

#399DD1 #3951D1 #6D39D1

triadic

#3951D1 #D13951 #51D139

tetradic

#3951D1 #D1399D #D1B939 #39D16D

square

#3951D1 #D1399D #D1B939 #39D16D

split-complementary

#3951D1 #D16D39 #9DD139

monochromatic

#1B2975 #273BA6 #3951D1 #6B7DDD #9CA8E8

Accessibility & contrast

On white

6.42

#3951D1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.27

#3951D1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3951D1

6.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3951D1	#FFFFFF	#000000	##FFFFFF
##3951D1	1.00	6.42	3.27	6.42
#FFFFFF	6.42	1.00	21.00	1.00
#000000	3.27	21.00	1.00	21.00
##FFFFFF	6.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0066D5

Deuteranopia (green-blind)

#0058CF

Tritanopia (blue-blind)

#007289

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #3951d1;
/* rgb */ color: rgb(57, 81, 209);
/* oklch */ color: oklch(49.8% 0.198 269.5);

Tailwind

colors: {
  custom: {
    50: '#8481e0',
    500: '#3951d1',
    950: '#000000',
  },
}

SCSS

$custom: #3951d1;
$custom-light: #8481e0;
$custom-dark: #000000;

JSON

{
  "hex": "#3951d1",
  "rgb": {
    "r": 57,
    "g": 81,
    "b": 209
  },
  "hsl": {
    "h": 230.526,
    "s": 62.295,
    "l": 52.157
  },
  "oklch": {
    "l": 0.49781,
    "c": 0.19817,
    "h": 269.5
  },
  "luminance": 0.11358
}

Semantic roles & 50–950 ramp

primary

#3951D1

secondary

#D4CA92

accent

#CC42E5

background

#F8F7FD

surface

#F0EEFB

border

#CBC9D4

text

#0C0A15

muted

#7D7C83

Preview Lab

Preview with #3951D1

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

Preview Lab → · Contrast checker → · Palette generator →