#3777B1#3777B1

#3777B1 is a mid, moderate cyan. Relative luminance 0.172; OKLCH L 55.5% C 0.112 H 248.5°. Best body text is #FFFFFF at 4.73:1 contrast (WCAG AA passes).

Color values

HEX	#3777B1
RGB	rgb(55, 119, 177)
HSL	hsl(209, 53%, 45%)
HSV	hsv(209, 69%, 69%)
CMYK	cmyk(68.9%, 32.8%, 0%, 30.6%)
CIE-LAB	lab(48.48, -1.27, -36.74)
CIE-LCH	lch(48.48, 36.77, 268.02°)
OKLab	oklab(55.46% -0.0409 -0.1041)
OKLCH	oklch(55.46% 0.112 248.5)
XYZ	xyz(16.1052, 17.1785, 44.0535)
Luminance	0.1718 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3777B1 #B17137

analogous

#37B1AE #3777B1 #373AB1

triadic

#3777B1 #B13777 #77B137

tetradic

#3777B1 #AE37B1 #B17137 #3AB137

square

#3777B1 #AE37B1 #B17137 #3AB137

split-complementary

#3777B1 #B1373A #B1AE37

monochromatic

#1A3854 #285882 #3777B1 #5A95CC #88B3DA

Accessibility & contrast

On white

4.73

#3777B1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.44

#3777B1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3777B1

4.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3777B1	#FFFFFF	#000000	##FFFFFF
##3777B1	1.00	4.73	4.44	4.73
#FFFFFF	4.73	1.00	21.00	1.00
#000000	4.44	21.00	1.00	21.00
##FFFFFF	4.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5D7AB3

Deuteranopia (green-blind)

#4C6EB0

Tritanopia (blue-blind)

#00858C

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #3777b1;
/* rgb */ color: rgb(55, 119, 177);
/* oklch */ color: oklch(55.5% 0.112 248.5);

Tailwind

colors: {
  custom: {
    50: '#7c9dc8',
    500: '#3777b1',
    950: '#000000',
  },
}

SCSS

$custom: #3777b1;
$custom-light: #7c9dc8;
$custom-dark: #000000;

JSON

{
  "hex": "#3777b1",
  "rgb": {
    "r": 55,
    "g": 119,
    "b": 177
  },
  "hsl": {
    "h": 208.525,
    "s": 52.586,
    "l": 45.49
  },
  "oklch": {
    "l": 0.55458,
    "c": 0.11184,
    "h": 248.5
  },
  "luminance": 0.1718
}

Semantic roles & 50–950 ramp

primary

#3777B1

secondary

#C4A080

accent

#904CDC

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #3777B1

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

Preview Lab → · Contrast checker → · Palette generator →