#3678BC#3678BC

#3678BC is a mid, vivid cyan. Relative luminance 0.178; OKLCH L 56.3% C 0.125 H 251.6°. Best body text is #FFFFFF at 4.60:1 contrast (WCAG AA passes).

Color values

HEX	#3678BC
RGB	rgb(54, 120, 188)
HSL	hsl(210, 55%, 47%)
HSV	hsv(210, 71%, 74%)
CMYK	cmyk(71.3%, 36.2%, 0%, 26.3%)
CIE-LAB	lab(49.31, 1.92, -41.80)
CIE-LCH	lch(49.31, 41.84, 272.63°)
OKLab	oklab(56.28% -0.0395 -0.1188)
OKLCH	oklch(56.28% 0.125 251.6)
XYZ	xyz(17.3115, 17.8462, 50.0995)
Luminance	0.1785 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3678BC #BC7A36

analogous

#36BBBC #3678BC #3736BC

triadic

#3678BC #BC3678 #78BC36

tetradic

#3678BC #BC36BB #BC7A36 #36BC37

square

#3678BC #BC36BB #BC7A36 #36BC37

split-complementary

#3678BC #BC3736 #BBBC36

monochromatic

#1B3B5D #285A8C #3678BC #5E97D1 #8EB6DF

Accessibility & contrast

On white

4.60

#3678BC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.57

#3678BC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3678BC

4.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3678BC	#FFFFFF	#000000	##FFFFFF
##3678BC	1.00	4.60	4.57	4.60
#FFFFFF	4.60	1.00	21.00	1.00
#000000	4.57	21.00	1.00	21.00
##FFFFFF	4.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#597CBF

Deuteranopia (green-blind)

#466FBB

Tritanopia (blue-blind)

#008891

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #3678bc;
/* rgb */ color: rgb(54, 120, 188);
/* oklch */ color: oklch(56.3% 0.125 251.6);

Tailwind

colors: {
  custom: {
    50: '#7d9ed0',
    500: '#3678bc',
    950: '#000000',
  },
}

SCSS

$custom: #3678bc;
$custom-light: #7d9ed0;
$custom-dark: #000000;

JSON

{
  "hex": "#3678bc",
  "rgb": {
    "r": 54,
    "g": 120,
    "b": 188
  },
  "hsl": {
    "h": 210.448,
    "s": 55.372,
    "l": 47.451
  },
  "oklch": {
    "l": 0.5628,
    "c": 0.12525,
    "h": 251.6
  },
  "luminance": 0.17848
}

Semantic roles & 50–950 ramp

primary

#3678BC

secondary

#C9A785

accent

#9549DF

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #3678BC

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

Preview Lab → · Contrast checker → · Palette generator →