#3957C7#3957C7

#3957C7 is a mid, vivid blue. Relative luminance 0.118; OKLCH L 50.1% C 0.178 H 268.0°. Best body text is #FFFFFF at 6.25:1 contrast (WCAG AA passes).

Color values

HEX	#3957C7
RGB	rgb(57, 87, 199)
HSL	hsl(227, 56%, 50%)
HSV	hsv(227, 71%, 78%)
CMYK	cmyk(71.4%, 56.3%, 0%, 22%)
CIE-LAB	lab(40.91, 27.29, -61.63)
CIE-LCH	lch(40.91, 67.40, 293.88°)
OKLab	oklab(50.09% -0.0062 -0.1776)
OKLCH	oklch(50.09% 0.178 268)
XYZ	xyz(15.4008, 11.8082, 55.4893)
Luminance	0.1181 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3957C7 #C7A939

analogous

#399EC7 #3957C7 #6239C7

triadic

#3957C7 #C73957 #57C739

tetradic

#3957C7 #C7399E #C7A939 #39C762

square

#3957C7 #C7399E #C7A939 #39C762

split-complementary

#3957C7 #C76239 #9EC739

monochromatic

#1D2D68 #2B4298 #3957C7 #697FD4 #98A8E2

Accessibility & contrast

On white

6.25

#3957C7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.36

#3957C7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3957C7

6.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3957C7	#FFFFFF	#000000	##FFFFFF
##3957C7	1.00	6.25	3.36	6.25
#FFFFFF	6.25	1.00	21.00	1.00
#000000	3.36	21.00	1.00	21.00
##FFFFFF	6.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0067CB

Deuteranopia (green-blind)

#005AC5

Tritanopia (blue-blind)

#007286

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #3957c7;
/* rgb */ color: rgb(57, 87, 199);
/* oklch */ color: oklch(50.1% 0.178 268.0);

Tailwind

colors: {
  custom: {
    50: '#8286d9',
    500: '#3957c7',
    950: '#000000',
  },
}

SCSS

$custom: #3957c7;
$custom-light: #8286d9;
$custom-dark: #000000;

JSON

{
  "hex": "#3957c7",
  "rgb": {
    "r": 57,
    "g": 87,
    "b": 199
  },
  "hsl": {
    "h": 227.324,
    "s": 55.906,
    "l": 50.196
  },
  "oklch": {
    "l": 0.50085,
    "c": 0.17771,
    "h": 268
  },
  "luminance": 0.1181
}

Semantic roles & 50–950 ramp

primary

#3957C7

secondary

#CEC08E

accent

#BF49DF

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0C0B15

muted

#7D7C83

Preview Lab

Preview with #3957C7

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

Preview Lab → · Contrast checker → · Palette generator →