#3770B7#3770B7

#3770B7 is a mid, vivid cyan. Relative luminance 0.158; OKLCH L 54.2% C 0.127 H 255.2°. Best body text is #FFFFFF at 5.04:1 contrast (WCAG AA passes).

Color values

HEX	#3770B7
RGB	rgb(55, 112, 183)
HSL	hsl(213, 54%, 47%)
HSV	hsv(213, 70%, 72%)
CMYK	cmyk(69.9%, 38.8%, 0%, 28.2%)
CIE-LAB	lab(46.73, 5.17, -42.99)
CIE-LCH	lch(46.73, 43.30, 276.86°)
OKLab	oklab(54.19% -0.0323 -0.1224)
OKLCH	oklch(54.19% 0.127 255.2)
XYZ	xyz(15.9138, 15.8178, 47.0050)
Luminance	0.1582 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3770B7 #B77E37

analogous

#37B0B7 #3770B7 #3E37B7

triadic

#3770B7 #B73770 #70B737

tetradic

#3770B7 #B737B0 #B77E37 #37B73E

square

#3770B7 #B737B0 #B77E37 #37B73E

split-complementary

#3770B7 #B73E37 #B0B737

monochromatic

#1B3659 #295388 #3770B7 #5D8FCE #8CB0DC

Accessibility & contrast

On white

5.04

#3770B7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.16

#3770B7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3770B7

5.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3770B7	#FFFFFF	#000000	##FFFFFF
##3770B7	1.00	5.04	4.16	5.04
#FFFFFF	5.04	1.00	21.00	1.00
#000000	4.16	21.00	1.00	21.00
##FFFFFF	5.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5075BA

Deuteranopia (green-blind)

#3C69B6

Tritanopia (blue-blind)

#00818A

Achromatopsia (no color)

#6F6F6F

Design tokens & code

CSS

--color: #3770b7;
/* rgb */ color: rgb(55, 112, 183);
/* oklch */ color: oklch(54.2% 0.127 255.2);

Tailwind

colors: {
  custom: {
    50: '#7d98cd',
    500: '#3770b7',
    950: '#000000',
  },
}

SCSS

$custom: #3770b7;
$custom-light: #7d98cd;
$custom-dark: #000000;

JSON

{
  "hex": "#3770b7",
  "rgb": {
    "r": 55,
    "g": 112,
    "b": 183
  },
  "hsl": {
    "h": 213.281,
    "s": 53.782,
    "l": 46.667
  },
  "oklch": {
    "l": 0.54191,
    "c": 0.12664,
    "h": 255.2
  },
  "luminance": 0.15819
}

Semantic roles & 50–950 ramp

primary

#3770B7

secondary

#C7A983

accent

#9C4BDD

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0D13

muted

#7C7E82

Preview Lab

Preview with #3770B7

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

Preview Lab → · Contrast checker → · Palette generator →