#3957CD#3957CD

#3957CD is a mid, vivid blue. Relative luminance 0.121; OKLCH L 50.6% C 0.186 H 268.1°. Best body text is #FFFFFF at 6.14:1 contrast (WCAG AA passes).

Color values

HEX	#3957CD
RGB	rgb(57, 87, 205)
HSL	hsl(228, 60%, 51%)
HSV	hsv(228, 72%, 80%)
CMYK	cmyk(72.2%, 57.6%, 0%, 19.6%)
CIE-LAB	lab(41.36, 29.46, -64.36)
CIE-LCH	lch(41.36, 70.79, 294.60°)
OKLab	oklab(50.57% -0.006 -0.1856)
OKLCH	oklch(50.57% 0.186 268.1)
XYZ	xyz(16.1112, 12.0923, 59.2307)
Luminance	0.1209 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3957CD #CDAF39

analogous

#39A1CD #3957CD #6539CD

triadic

#3957CD #CD3957 #57CD39

tetradic

#3957CD #CD39A1 #CDAF39 #39CD65

square

#3957CD #CD39A1 #CDAF39 #39CD65

split-complementary

#3957CD #CD6539 #A1CD39

monochromatic

#1C2D6F #2841A0 #3957CD #6A80D9 #9BAAE6

Accessibility & contrast

On white

6.14

#3957CD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.42

#3957CD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3957CD

6.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3957CD	#FFFFFF	#000000	##FFFFFF
##3957CD	1.00	6.14	3.42	6.14
#FFFFFF	6.14	1.00	21.00	1.00
#000000	3.42	21.00	1.00	21.00
##FFFFFF	6.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0069D1

Deuteranopia (green-blind)

#005BCB

Tritanopia (blue-blind)

#007489

Achromatopsia (no color)

#626262

Design tokens & code

CSS

--color: #3957cd;
/* rgb */ color: rgb(57, 87, 205);
/* oklch */ color: oklch(50.6% 0.186 268.1);

Tailwind

colors: {
  custom: {
    50: '#8386dd',
    500: '#3957cd',
    950: '#000000',
  },
}

SCSS

$custom: #3957cd;
$custom-light: #8386dd;
$custom-dark: #000000;

JSON

{
  "hex": "#3957cd",
  "rgb": {
    "r": 57,
    "g": 87,
    "b": 205
  },
  "hsl": {
    "h": 227.838,
    "s": 59.677,
    "l": 51.373
  },
  "oklch": {
    "l": 0.50566,
    "c": 0.18573,
    "h": 268.1
  },
  "luminance": 0.12094
}

Semantic roles & 50–950 ramp

primary

#3957CD

secondary

#D2C490

accent

#C345E3

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0C0B15

muted

#7D7C83

Preview Lab

Preview with #3957CD

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

Preview Lab → · Contrast checker → · Palette generator →