#3378CB#3378CB

#3378CB is a mid, vivid cyan. Relative luminance 0.184; OKLCH L 57.1% C 0.146 H 255.0°. Best body text is #000000 at 4.69:1 contrast (WCAG AA passes).

Color values

HEX	#3378CB
RGB	rgb(51, 120, 203)
HSL	hsl(213, 60%, 50%)
HSV	hsv(213, 75%, 80%)
CMYK	cmyk(74.9%, 40.9%, 0%, 20.4%)
CIE-LAB	lab(50.03, 6.99, -49.25)
CIE-LCH	lch(50.03, 49.75, 278.08°)
OKLab	oklab(57.08% -0.0378 -0.1407)
OKLCH	oklch(57.08% 0.146 255)
XYZ	xyz(18.8572, 18.4464, 59.0550)
Luminance	0.1845 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3378CB #CB8633

analogous

#33C4CB #3378CB #3A33CB

triadic

#3378CB #CB3378 #78CB33

tetradic

#3378CB #CB33C4 #CB8633 #33CB3A

square

#3378CB #CB33C4 #CB8633 #33CB3A

split-complementary

#3378CB #CB3A33 #C4CB33

monochromatic

#1A3E69 #275B9A #3378CB #6398D8 #94B9E4

Accessibility & contrast

On white

4.48

#3378CB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.69

#3378CB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3378CB

4.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3378CB	#FFFFFF	#000000	##000000
##3378CB	1.00	4.48	4.69	4.69
#FFFFFF	4.48	1.00	21.00	21.00
#000000	4.69	21.00	1.00	1.00
##000000	4.69	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#507FCE

Deuteranopia (green-blind)

#3771C9

Tritanopia (blue-blind)

#008C97

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #3378cb;
/* rgb */ color: rgb(51, 120, 203);
/* oklch */ color: oklch(57.1% 0.146 255.0);

Tailwind

colors: {
  custom: {
    50: '#7f9edb',
    500: '#3378cb',
    950: '#000000',
  },
}

SCSS

$custom: #3378cb;
$custom-light: #7f9edb;
$custom-dark: #000000;

JSON

{
  "hex": "#3378cb",
  "rgb": {
    "r": 51,
    "g": 120,
    "b": 203
  },
  "hsl": {
    "h": 212.763,
    "s": 59.843,
    "l": 49.804
  },
  "oklch": {
    "l": 0.57085,
    "c": 0.14573,
    "h": 255
  },
  "luminance": 0.18449
}

Semantic roles & 50–950 ramp

primary

#3378CB

secondary

#CFB08B

accent

#9B45E3

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0B0E15

muted

#7C7E83

Preview Lab

Preview with #3378CB

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

Preview Lab → · Contrast checker → · Palette generator →