#3957D1#3957D1

#3957D1 is a mid, vivid blue. Relative luminance 0.123; OKLCH L 50.9% C 0.191 H 268.2°. Best body text is #FFFFFF at 6.07:1 contrast (WCAG AA passes).

Color values

HEX	#3957D1
RGB	rgb(57, 87, 209)
HSL	hsl(228, 62%, 52%)
HSV	hsv(228, 73%, 82%)
CMYK	cmyk(72.7%, 58.4%, 0%, 18%)
CIE-LAB	lab(41.67, 30.91, -66.17)
CIE-LCH	lch(41.67, 73.03, 295.04°)
OKLab	oklab(50.89% -0.0059 -0.1909)
OKLCH	oklch(50.89% 0.191 268.2)
XYZ	xyz(16.6002, 12.2879, 61.8062)
Luminance	0.1229 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3957D1 #D1B339

analogous

#39A3D1 #3957D1 #6739D1

triadic

#3957D1 #D13957 #57D139

tetradic

#3957D1 #D139A3 #D1B339 #39D167

square

#3957D1 #D139A3 #D1B339 #39D167

split-complementary

#3957D1 #D16739 #A3D139

monochromatic

#1B2D75 #2740A6 #3957D1 #6B81DD #9CABE8

Accessibility & contrast

On white

6.07

#3957D1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.46

#3957D1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3957D1

6.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3957D1	#FFFFFF	#000000	##FFFFFF
##3957D1	1.00	6.07	3.46	6.07
#FFFFFF	6.07	1.00	21.00	1.00
#000000	3.46	21.00	1.00	21.00
##FFFFFF	6.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006AD5

Deuteranopia (green-blind)

#005BCF

Tritanopia (blue-blind)

#00768B

Achromatopsia (no color)

#626262

Design tokens & code

CSS

--color: #3957d1;
/* rgb */ color: rgb(57, 87, 209);
/* oklch */ color: oklch(50.9% 0.191 268.2);

Tailwind

colors: {
  custom: {
    50: '#8486e0',
    500: '#3957d1',
    950: '#000000',
  },
}

SCSS

$custom: #3957d1;
$custom-light: #8486e0;
$custom-dark: #000000;

JSON

{
  "hex": "#3957d1",
  "rgb": {
    "r": 57,
    "g": 87,
    "b": 209
  },
  "hsl": {
    "h": 228.158,
    "s": 62.295,
    "l": 52.157
  },
  "oklch": {
    "l": 0.50892,
    "c": 0.19102,
    "h": 268.2
  },
  "luminance": 0.1229
}

Semantic roles & 50–950 ramp

primary

#3957D1

secondary

#D4C792

accent

#C542E5

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0C0B15

muted

#7D7C83

Preview Lab

Preview with #3957D1

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

Preview Lab → · Contrast checker → · Palette generator →