#3957BE#3957BE

#3957BE is a mid, vivid blue. Relative luminance 0.114; OKLCH L 49.4% C 0.166 H 267.7°. Best body text is #FFFFFF at 6.40:1 contrast (WCAG AA passes).

Color values

HEX	#3957BE
RGB	rgb(57, 87, 190)
HSL	hsl(226, 54%, 48%)
HSV	hsv(226, 70%, 75%)
CMYK	cmyk(70%, 54.2%, 0%, 25.5%)
CIE-LAB	lab(40.25, 24.01, -57.47)
CIE-LCH	lch(40.25, 62.28, 292.67°)
OKLab	oklab(49.38% -0.0067 -0.1654)
OKLCH	oklch(49.38% 0.166 267.7)
XYZ	xyz(14.3866, 11.4025, 50.1479)
Luminance	0.1140 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3957BE #BEA039

analogous

#3999BE #3957BE #5D39BE

triadic

#3957BE #BE3957 #57BE39

tetradic

#3957BE #BE3999 #BEA039 #39BE5D

square

#3957BE #BE3999 #BEA039 #39BE5D

split-complementary

#3957BE #BE5D39 #99BE39

monochromatic

#1D2C60 #2B418F #3957BE #647CD0 #93A4DF

Accessibility & contrast

On white

6.40

#3957BE on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.28

#3957BE on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3957BE

6.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3957BE	#FFFFFF	#000000	##FFFFFF
##3957BE	1.00	6.40	3.28	6.40
#FFFFFF	6.40	1.00	21.00	1.00
#000000	3.28	21.00	1.00	21.00
##FFFFFF	6.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0365C2

Deuteranopia (green-blind)

#0059BC

Tritanopia (blue-blind)

#007082

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #3957be;
/* rgb */ color: rgb(57, 87, 190);
/* oklch */ color: oklch(49.4% 0.166 267.7);

Tailwind

colors: {
  custom: {
    50: '#8086d2',
    500: '#3957be',
    950: '#000000',
  },
}

SCSS

$custom: #3957be;
$custom-light: #8086d2;
$custom-dark: #000000;

JSON

{
  "hex": "#3957be",
  "rgb": {
    "r": 57,
    "g": 87,
    "b": 190
  },
  "hsl": {
    "h": 226.466,
    "s": 53.846,
    "l": 48.431
  },
  "oklch": {
    "l": 0.49381,
    "c": 0.1655,
    "h": 267.7
  },
  "luminance": 0.11404
}

Semantic roles & 50–950 ramp

primary

#3957BE

secondary

#CABB89

accent

#BC4BDD

background

#F8F8FD

surface

#F0EFFA

border

#CBCAD3

text

#0B0B14

muted

#7C7C83

Preview Lab

Preview with #3957BE

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

Preview Lab → · Contrast checker → · Palette generator →