#3778CC#3778CC

#3778CC is a mid, vivid cyan. Relative luminance 0.186; OKLCH L 57.3% C 0.146 H 256.1°. Best body text is #000000 at 4.72:1 contrast (WCAG AA passes).

Color values

HEX	#3778CC
RGB	rgb(55, 120, 204)
HSL	hsl(214, 59%, 51%)
HSV	hsv(214, 73%, 80%)
CMYK	cmyk(73%, 41.2%, 0%, 20%)
CIE-LAB	lab(50.22, 7.88, -49.52)
CIE-LCH	lch(50.22, 50.14, 279.05°)
OKLab	oklab(57.28% -0.0351 -0.1415)
OKLCH	oklch(57.28% 0.146 256.1)
XYZ	xyz(19.1871, 18.6027, 59.6945)
Luminance	0.1860 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3778CC #CC8B37

analogous

#37C2CC #3778CC #4037CC

triadic

#3778CC #CC3778 #78CC37

tetradic

#3778CC #CC37C2 #CC8B37 #37CC40

square

#3778CC #CC37C2 #CC8B37 #37CC40

split-complementary

#3778CC #CC4037 #C2CC37

monochromatic

#1C3F6D #285B9E #3778CC #6899D8 #99BAE5

Accessibility & contrast

On white

4.45

#3778CC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.72

#3778CC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3778CC

4.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3778CC	#FFFFFF	#000000	##000000
##3778CC	1.00	4.45	4.72	4.72
#FFFFFF	4.45	1.00	21.00	21.00
#000000	4.72	21.00	1.00	1.00
##000000	4.72	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#507FCF

Deuteranopia (green-blind)

#3771CA

Tritanopia (blue-blind)

#008C98

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #3778cc;
/* rgb */ color: rgb(55, 120, 204);
/* oklch */ color: oklch(57.3% 0.146 256.1);

Tailwind

colors: {
  custom: {
    50: '#819edc',
    500: '#3778cc',
    950: '#000000',
  },
}

SCSS

$custom: #3778cc;
$custom-light: #819edc;
$custom-dark: #000000;

JSON

{
  "hex": "#3778cc",
  "rgb": {
    "r": 55,
    "g": 120,
    "b": 204
  },
  "hsl": {
    "h": 213.826,
    "s": 59.363,
    "l": 50.784
  },
  "oklch": {
    "l": 0.57284,
    "c": 0.14574,
    "h": 256.1
  },
  "luminance": 0.18605
}

Semantic roles & 50–950 ramp

primary

#3778CC

secondary

#D0B48E

accent

#9E45E3

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3778CC

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

Preview Lab → · Contrast checker → · Palette generator →