#3678CB#3678CB

#3678CB is a mid, vivid cyan. Relative luminance 0.185; OKLCH L 57.2% C 0.145 H 255.6°. Best body text is #000000 at 4.71:1 contrast (WCAG AA passes).

Color values

HEX	#3678CB
RGB	rgb(54, 120, 203)
HSL	hsl(213, 59%, 50%)
HSV	hsv(213, 73%, 80%)
CMYK	cmyk(73.4%, 40.9%, 0%, 20.4%)
CIE-LAB	lab(50.13, 7.38, -49.09)
CIE-LCH	lch(50.13, 49.65, 278.55°)
OKLab	oklab(57.19% -0.0359 -0.1402)
OKLCH	oklch(57.19% 0.145 255.6)
XYZ	xyz(19.0133, 18.5269, 59.0623)
Luminance	0.1853 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3678CB #CB8936

analogous

#36C2CB #3678CB #3F36CB

triadic

#3678CB #CB3678 #78CB36

tetradic

#3678CB #CB36C2 #CB8936 #36CB3F

square

#3678CB #CB36C2 #CB8936 #36CB3F

split-complementary

#3678CB #CB3F36 #C2CB36

monochromatic

#1C3F6B #285B9C #3678CB #6799D8 #97B9E4

Accessibility & contrast

On white

4.46

#3678CB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.71

#3678CB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3678CB

4.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3678CB	#FFFFFF	#000000	##000000
##3678CB	1.00	4.46	4.71	4.71
#FFFFFF	4.46	1.00	21.00	21.00
#000000	4.71	21.00	1.00	1.00
##000000	4.71	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#507FCE

Deuteranopia (green-blind)

#3871C9

Tritanopia (blue-blind)

#008B97

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #3678cb;
/* rgb */ color: rgb(54, 120, 203);
/* oklch */ color: oklch(57.2% 0.145 255.6);

Tailwind

colors: {
  custom: {
    50: '#809edb',
    500: '#3678cb',
    950: '#000000',
  },
}

SCSS

$custom: #3678cb;
$custom-light: #809edb;
$custom-dark: #000000;

JSON

{
  "hex": "#3678cb",
  "rgb": {
    "r": 54,
    "g": 120,
    "b": 203
  },
  "hsl": {
    "h": 213.423,
    "s": 58.893,
    "l": 50.392
  },
  "oklch": {
    "l": 0.57187,
    "c": 0.14476,
    "h": 255.6
  },
  "luminance": 0.18529
}

Semantic roles & 50–950 ramp

primary

#3678CB

secondary

#D0B28D

accent

#9D46E2

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3678CB

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

Preview Lab → · Contrast checker → · Palette generator →