#3757CA#3757CA

#3757CA is a mid, vivid blue. Relative luminance 0.119; OKLCH L 50.2% C 0.182 H 267.5°. Best body text is #FFFFFF at 6.22:1 contrast (WCAG AA passes).

Color values

HEX	#3757CA
RGB	rgb(55, 87, 202)
HSL	hsl(227, 58%, 50%)
HSV	hsv(227, 73%, 79%)
CMYK	cmyk(72.8%, 56.9%, 0%, 20.8%)
CIE-LAB	lab(41.04, 28.12, -63.16)
CIE-LCH	lch(41.04, 69.13, 294.00°)
OKLab	oklab(50.23% -0.0079 -0.1821)
OKLCH	oklch(50.23% 0.182 267.5)
XYZ	xyz(15.6407, 11.8912, 57.3366)
Luminance	0.1189 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3757CA #CAAA37

analogous

#37A0CA #3757CA #6037CA

triadic

#3757CA #CA3757 #57CA37

tetradic

#3757CA #CA37A0 #CAAA37 #37CA60

square

#3757CA #CA37A0 #CAAA37 #37CA60

split-complementary

#3757CA #CA6037 #A0CA37

monochromatic

#1C2D6A #29429B #3757CA #6780D7 #98A8E4

Accessibility & contrast

On white

6.22

#3757CA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.38

#3757CA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3757CA

6.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3757CA	#FFFFFF	#000000	##FFFFFF
##3757CA	1.00	6.22	3.38	6.22
#FFFFFF	6.22	1.00	21.00	1.00
#000000	3.38	21.00	1.00	21.00
##FFFFFF	6.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0068CE

Deuteranopia (green-blind)

#005AC8

Tritanopia (blue-blind)

#007388

Achromatopsia (no color)

#616161

Design tokens & code

CSS

--color: #3757ca;
/* rgb */ color: rgb(55, 87, 202);
/* oklch */ color: oklch(50.2% 0.182 267.5);

Tailwind

colors: {
  custom: {
    50: '#8186db',
    500: '#3757ca',
    950: '#000000',
  },
}

SCSS

$custom: #3757ca;
$custom-light: #8186db;
$custom-dark: #000000;

JSON

{
  "hex": "#3757ca",
  "rgb": {
    "r": 55,
    "g": 87,
    "b": 202
  },
  "hsl": {
    "h": 226.939,
    "s": 58.103,
    "l": 50.392
  },
  "oklch": {
    "l": 0.5023,
    "c": 0.18229,
    "h": 267.5
  },
  "luminance": 0.11893
}

Semantic roles & 50–950 ramp

primary

#3757CA

secondary

#CFC18E

accent

#C046E1

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0C0B15

muted

#7D7C83

Preview Lab

Preview with #3757CA

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

Preview Lab → · Contrast checker → · Palette generator →