#3777CB#3777CB

#3777CB is a mid, vivid cyan. Relative luminance 0.183; OKLCH L 57.0% C 0.146 H 256.3°. Best body text is #000000 at 4.66:1 contrast (WCAG AA passes).

Color values

HEX	#3777CB
RGB	rgb(55, 119, 203)
HSL	hsl(214, 59%, 51%)
HSV	hsv(214, 73%, 80%)
CMYK	cmyk(72.9%, 41.4%, 0%, 20.4%)
CIE-LAB	lab(49.88, 8.13, -49.49)
CIE-LCH	lch(49.88, 50.16, 279.33°)
OKLab	oklab(57% -0.0344 -0.1414)
OKLCH	oklch(57% 0.146 256.3)
XYZ	xyz(18.9479, 18.3156, 59.0250)
Luminance	0.1832 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3777CB #CB8B37

analogous

#37C1CB #3777CB #4137CB

triadic

#3777CB #CB3777 #77CB37

tetradic

#3777CB #CB37C1 #CB8B37 #37CB41

square

#3777CB #CB37C1 #CB8B37 #37CB41

split-complementary

#3777CB #CB4137 #C1CB37

monochromatic

#1C3E6C #295B9C #3777CB #6898D8 #98B9E4

Accessibility & contrast

On white

4.50

#3777CB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.66

#3777CB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3777CB

4.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3777CB	#FFFFFF	#000000	##000000
##3777CB	1.00	4.50	4.66	4.66
#FFFFFF	4.50	1.00	21.00	21.00
#000000	4.66	21.00	1.00	1.00
##000000	4.66	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4F7ECE

Deuteranopia (green-blind)

#3670C9

Tritanopia (blue-blind)

#008B97

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #3777cb;
/* rgb */ color: rgb(55, 119, 203);
/* oklch */ color: oklch(57.0% 0.146 256.3);

Tailwind

colors: {
  custom: {
    50: '#809ddb',
    500: '#3777cb',
    950: '#000000',
  },
}

SCSS

$custom: #3777cb;
$custom-light: #809ddb;
$custom-dark: #000000;

JSON

{
  "hex": "#3777cb",
  "rgb": {
    "r": 55,
    "g": 119,
    "b": 203
  },
  "hsl": {
    "h": 214.054,
    "s": 58.73,
    "l": 50.588
  },
  "oklch": {
    "l": 0.57,
    "c": 0.14553,
    "h": 256.3
  },
  "luminance": 0.18318
}

Semantic roles & 50–950 ramp

primary

#3777CB

secondary

#D0B38E

accent

#9E46E2

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3777CB

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

Preview Lab → · Contrast checker → · Palette generator →