#3777B8#3777B8

#3777B8 is a mid, vivid cyan. Relative luminance 0.175; OKLCH L 55.9% C 0.121 H 251.2°. Best body text is #FFFFFF at 4.67:1 contrast (WCAG AA passes).

Color values

HEX	#3777B8
RGB	rgb(55, 119, 184)
HSL	hsl(210, 54%, 47%)
HSV	hsv(210, 70%, 72%)
CMYK	cmyk(70.1%, 35.3%, 0%, 27.8%)
CIE-LAB	lab(48.84, 1.24, -40.23)
CIE-LCH	lch(48.84, 40.25, 271.76°)
OKLab	oklab(55.85% -0.039 -0.1143)
OKLCH	oklch(55.85% 0.121 251.2)
XYZ	xyz(16.8209, 17.4648, 47.8227)
Luminance	0.1747 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3777B8 #B87837

analogous

#37B8B8 #3777B8 #3837B8

triadic

#3777B8 #B83777 #77B837

tetradic

#3777B8 #B837B8 #B87837 #37B838

square

#3777B8 #B837B8 #B87837 #37B838

split-complementary

#3777B8 #B83837 #B8B837

monochromatic

#1B3A5A #295989 #3777B8 #5D96CF #8DB4DD

Accessibility & contrast

On white

4.67

#3777B8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.49

#3777B8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3777B8

4.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3777B8	#FFFFFF	#000000	##FFFFFF
##3777B8	1.00	4.67	4.49	4.67
#FFFFFF	4.67	1.00	21.00	1.00
#000000	4.49	21.00	1.00	21.00
##FFFFFF	4.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5A7BBB

Deuteranopia (green-blind)

#476FB7

Tritanopia (blue-blind)

#00868F

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3777b8;
/* rgb */ color: rgb(55, 119, 184);
/* oklch */ color: oklch(55.9% 0.121 251.2);

Tailwind

colors: {
  custom: {
    50: '#7d9dcd',
    500: '#3777b8',
    950: '#000000',
  },
}

SCSS

$custom: #3777b8;
$custom-light: #7d9dcd;
$custom-dark: #000000;

JSON

{
  "hex": "#3777b8",
  "rgb": {
    "r": 55,
    "g": 119,
    "b": 184
  },
  "hsl": {
    "h": 210.233,
    "s": 53.975,
    "l": 46.863
  },
  "oklch": {
    "l": 0.55854,
    "c": 0.12072,
    "h": 251.2
  },
  "luminance": 0.17467
}

Semantic roles & 50–950 ramp

primary

#3777B8

secondary

#C7A684

accent

#944ADD

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #3777B8

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

Preview Lab → · Contrast checker → · Palette generator →