#3770BD#3770BD

#3770BD is a mid, vivid cyan. Relative luminance 0.161; OKLCH L 54.6% C 0.135 H 256.7°. Best body text is #FFFFFF at 4.98:1 contrast (WCAG AA passes).

Color values

HEX	#3770BD
RGB	rgb(55, 112, 189)
HSL	hsl(214, 55%, 48%)
HSV	hsv(214, 71%, 74%)
CMYK	cmyk(70.9%, 40.7%, 0%, 25.9%)
CIE-LAB	lab(47.07, 7.36, -45.93)
CIE-LCH	lch(47.07, 46.52, 279.10°)
OKLab	oklab(54.56% -0.031 -0.1311)
OKLCH	oklch(54.56% 0.135 256.7)
XYZ	xyz(16.5517, 16.0729, 50.3643)
Luminance	0.1608 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3770BD #BD8437

analogous

#37B3BD #3770BD #4137BD

triadic

#3770BD #BD3770 #70BD37

tetradic

#3770BD #BD37B3 #BD8437 #37BD41

square

#3770BD #BD37B3 #BD8437 #37BD41

split-complementary

#3770BD #BD4137 #B3BD37

monochromatic

#1B385E #29548E #3770BD #6090D1 #90B1DF

Accessibility & contrast

On white

4.98

#3770BD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.22

#3770BD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3770BD

4.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3770BD	#FFFFFF	#000000	##FFFFFF
##3770BD	1.00	4.98	4.22	4.98
#FFFFFF	4.98	1.00	21.00	1.00
#000000	4.22	21.00	1.00	21.00
##FFFFFF	4.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4C76C0

Deuteranopia (green-blind)

#366ABB

Tritanopia (blue-blind)

#00828D

Achromatopsia (no color)

#707070

Design tokens & code

CSS

--color: #3770bd;
/* rgb */ color: rgb(55, 112, 189);
/* oklch */ color: oklch(54.6% 0.135 256.7);

Tailwind

colors: {
  custom: {
    50: '#7e98d1',
    500: '#3770bd',
    950: '#000000',
  },
}

SCSS

$custom: #3770bd;
$custom-light: #7e98d1;
$custom-dark: #000000;

JSON

{
  "hex": "#3770bd",
  "rgb": {
    "r": 55,
    "g": 112,
    "b": 189
  },
  "hsl": {
    "h": 214.478,
    "s": 54.918,
    "l": 47.843
  },
  "oklch": {
    "l": 0.54561,
    "c": 0.13467,
    "h": 256.7
  },
  "luminance": 0.16075
}

Semantic roles & 50–950 ramp

primary

#3770BD

secondary

#C9AD86

accent

#9F4ADE

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0D14

muted

#7C7E82

Preview Lab

Preview with #3770BD

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

Preview Lab → · Contrast checker → · Palette generator →