#3757C8#3757C8

#3757C8 is a mid, vivid blue. Relative luminance 0.118; OKLCH L 50.1% C 0.180 H 267.5°. Best body text is #FFFFFF at 6.25:1 contrast (WCAG AA passes).

Color values

HEX	#3757C8
RGB	rgb(55, 87, 200)
HSL	hsl(227, 57%, 50%)
HSV	hsv(227, 73%, 78%)
CMYK	cmyk(72.5%, 56.5%, 0%, 21.6%)
CIE-LAB	lab(40.89, 27.39, -62.24)
CIE-LCH	lch(40.89, 68.00, 293.75°)
OKLab	oklab(50.07% -0.008 -0.1794)
OKLCH	oklch(50.07% 0.18 267.5)
XYZ	xyz(15.4054, 11.7971, 56.0976)
Luminance	0.1180 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3757C8 #C8A837

analogous

#379FC8 #3757C8 #6037C8

triadic

#3757C8 #C83757 #57C837

tetradic

#3757C8 #C8379F #C8A837 #37C860

square

#3757C8 #C8379F #C8A837 #37C860

split-complementary

#3757C8 #C86037 #9FC837

monochromatic

#1D2D68 #2A4298 #3757C8 #677FD5 #97A8E2

Accessibility & contrast

On white

6.25

#3757C8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.36

#3757C8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3757C8

6.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3757C8	#FFFFFF	#000000	##FFFFFF
##3757C8	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)

#0067CC

Deuteranopia (green-blind)

#005AC6

Tritanopia (blue-blind)

#007387

Achromatopsia (no color)

#606060

Design tokens & code

CSS

--color: #3757c8;
/* rgb */ color: rgb(55, 87, 200);
/* oklch */ color: oklch(50.1% 0.180 267.5);

Tailwind

colors: {
  custom: {
    50: '#8186da',
    500: '#3757c8',
    950: '#000000',
  },
}

SCSS

$custom: #3757c8;
$custom-light: #8186da;
$custom-dark: #000000;

JSON

{
  "hex": "#3757c8",
  "rgb": {
    "r": 55,
    "g": 87,
    "b": 200
  },
  "hsl": {
    "h": 226.759,
    "s": 56.863,
    "l": 50
  },
  "oklch": {
    "l": 0.50069,
    "c": 0.17962,
    "h": 267.5
  },
  "luminance": 0.11799
}

Semantic roles & 50–950 ramp

primary

#3757C8

secondary

#CEC08D

accent

#BE48E0

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0C0B15

muted

#7D7C83

Preview Lab

Preview with #3757C8

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

Preview Lab → · Contrast checker → · Palette generator →