#3777CF#3777CF

#3777CF is a mid, vivid cyan. Relative luminance 0.185; OKLCH L 57.3% C 0.151 H 257.1°. Best body text is #000000 at 4.70:1 contrast (WCAG AA passes).

Color values

HEX	#3777CF
RGB	rgb(55, 119, 207)
HSL	hsl(215, 61%, 51%)
HSV	hsv(215, 73%, 81%)
CMYK	cmyk(73.4%, 42.5%, 0%, 18.8%)
CIE-LAB	lab(50.11, 9.60, -51.41)
CIE-LCH	lch(50.11, 52.30, 280.58°)
OKLab	oklab(57.25% -0.0336 -0.147)
OKLCH	oklch(57.25% 0.151 257.1)
XYZ	xyz(19.4307, 18.5087, 61.5679)
Luminance	0.1851 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3777CF #CF8F37

analogous

#37C3CF #3777CF #4337CF

triadic

#3777CF #CF3777 #77CF37

tetradic

#3777CF #CF37C3 #CF8F37 #37CF43

square

#3777CF #CF37C3 #CF8F37 #37CF43

split-complementary

#3777CF #CF4337 #C3CF37

monochromatic

#1B3F71 #275BA2 #3777CF #6899DB #9ABAE7

Accessibility & contrast

On white

4.47

#3777CF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.70

#3777CF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3777CF

4.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3777CF	#FFFFFF	#000000	##000000
##3777CF	1.00	4.47	4.70	4.70
#FFFFFF	4.47	1.00	21.00	21.00
#000000	4.70	21.00	1.00	1.00
##000000	4.70	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4C7FD2

Deuteranopia (green-blind)

#3171CD

Tritanopia (blue-blind)

#008C99

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #3777cf;
/* rgb */ color: rgb(55, 119, 207);
/* oklch */ color: oklch(57.3% 0.151 257.1);

Tailwind

colors: {
  custom: {
    50: '#819dde',
    500: '#3777cf',
    950: '#000000',
  },
}

SCSS

$custom: #3777cf;
$custom-light: #819dde;
$custom-dark: #000000;

JSON

{
  "hex": "#3777cf",
  "rgb": {
    "r": 55,
    "g": 119,
    "b": 207
  },
  "hsl": {
    "h": 214.737,
    "s": 61.29,
    "l": 51.373
  },
  "oklch": {
    "l": 0.57254,
    "c": 0.1508,
    "h": 257.1
  },
  "luminance": 0.18511
}

Semantic roles & 50–950 ramp

primary

#3777CF

secondary

#D2B68F

accent

#A143E4

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3777CF

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

Preview Lab → · Contrast checker → · Palette generator →