#3378CC#3378CC

#3378CC is a mid, vivid cyan. Relative luminance 0.185; OKLCH L 57.1% C 0.147 H 255.2°. Best body text is #000000 at 4.70:1 contrast (WCAG AA passes).

Color values

HEX	#3378CC
RGB	rgb(51, 120, 204)
HSL	hsl(213, 60%, 50%)
HSV	hsv(213, 75%, 80%)
CMYK	cmyk(75%, 41.2%, 0%, 20%)
CIE-LAB	lab(50.09, 7.36, -49.73)
CIE-LCH	lch(50.09, 50.27, 278.42°)
OKLab	oklab(57.15% -0.0376 -0.1421)
OKLCH	oklch(57.15% 0.147 255.2)
XYZ	xyz(18.9768, 18.4942, 59.6846)
Luminance	0.1850 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3378CC #CC8733

analogous

#33C5CC #3378CC #3A33CC

triadic

#3378CC #CC3378 #78CC33

tetradic

#3378CC #CC33C5 #CC8733 #33CC3A

square

#3378CC #CC33C5 #CC8733 #33CC3A

split-complementary

#3378CC #CC3A33 #C5CC33

monochromatic

#1B3E6A #275B9B #3378CC #6498D8 #95B9E4

Accessibility & contrast

On white

4.47

#3378CC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.70

#3378CC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3378CC

4.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3378CC	#FFFFFF	#000000	##000000
##3378CC	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)

#4F7FCF

Deuteranopia (green-blind)

#3571CA

Tritanopia (blue-blind)

#008C98

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #3378cc;
/* rgb */ color: rgb(51, 120, 204);
/* oklch */ color: oklch(57.1% 0.147 255.2);

Tailwind

colors: {
  custom: {
    50: '#7f9edc',
    500: '#3378cc',
    950: '#000000',
  },
}

SCSS

$custom: #3378cc;
$custom-light: #7f9edc;
$custom-dark: #000000;

JSON

{
  "hex": "#3378cc",
  "rgb": {
    "r": 51,
    "g": 120,
    "b": 204
  },
  "hsl": {
    "h": 212.941,
    "s": 60,
    "l": 50
  },
  "oklch": {
    "l": 0.57148,
    "c": 0.14703,
    "h": 255.2
  },
  "luminance": 0.18496
}

Semantic roles & 50–950 ramp

primary

#3378CC

secondary

#D0B18B

accent

#9C45E3

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3378CC

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

Preview Lab → · Contrast checker → · Palette generator →