#3770C8#3770C8

#3770C8 is a mid, vivid blue. Relative luminance 0.166; OKLCH L 55.3% C 0.149 H 258.9°. Best body text is #FFFFFF at 4.87:1 contrast (WCAG AA passes).

Color values

HEX	#3770C8
RGB	rgb(55, 112, 200)
HSL	hsl(216, 57%, 50%)
HSV	hsv(216, 73%, 78%)
CMYK	cmyk(72.5%, 44%, 0%, 21.6%)
CIE-LAB	lab(47.71, 11.40, -51.24)
CIE-LCH	lch(47.71, 52.49, 282.54°)
OKLab	oklab(55.27% -0.0287 -0.1466)
OKLCH	oklch(55.27% 0.149 258.9)
XYZ	xyz(17.7913, 16.5688, 56.8928)
Luminance	0.1657 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3770C8 #C88F37

analogous

#37B8C8 #3770C8 #4737C8

triadic

#3770C8 #C83770 #70C837

tetradic

#3770C8 #C837B8 #C88F37 #37C847

square

#3770C8 #C837B8 #C88F37 #37C847

split-complementary

#3770C8 #C84737 #B8C837

monochromatic

#1D3A68 #2A5598 #3770C8 #6792D5 #97B5E2

Accessibility & contrast

On white

4.87

#3770C8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.31

#3770C8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3770C8

4.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3770C8	#FFFFFF	#000000	##FFFFFF
##3770C8	1.00	4.87	4.31	4.87
#FFFFFF	4.87	1.00	21.00	1.00
#000000	4.31	21.00	1.00	21.00
##FFFFFF	4.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4478CB

Deuteranopia (green-blind)

#296BC6

Tritanopia (blue-blind)

#008592

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #3770c8;
/* rgb */ color: rgb(55, 112, 200);
/* oklch */ color: oklch(55.3% 0.149 258.9);

Tailwind

colors: {
  custom: {
    50: '#8098d9',
    500: '#3770c8',
    950: '#000000',
  },
}

SCSS

$custom: #3770c8;
$custom-light: #8098d9;
$custom-dark: #000000;

JSON

{
  "hex": "#3770c8",
  "rgb": {
    "r": 55,
    "g": 112,
    "b": 200
  },
  "hsl": {
    "h": 216.414,
    "s": 56.863,
    "l": 50
  },
  "oklch": {
    "l": 0.55266,
    "c": 0.14944,
    "h": 258.9
  },
  "luminance": 0.16571
}

Semantic roles & 50–950 ramp

primary

#3770C8

secondary

#CEB48D

accent

#A448E0

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0C0D15

muted

#7D7E83

Preview Lab

Preview with #3770C8

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

Preview Lab → · Contrast checker → · Palette generator →