#3678B9#3678B9

#3678B9 is a mid, vivid cyan. Relative luminance 0.177; OKLCH L 56.1% C 0.121 H 250.6°. Best body text is #FFFFFF at 4.62:1 contrast (WCAG AA passes).

Color values

HEX	#3678B9
RGB	rgb(54, 120, 185)
HSL	hsl(210, 55%, 47%)
HSV	hsv(210, 71%, 73%)
CMYK	cmyk(70.8%, 35.1%, 0%, 27.5%)
CIE-LAB	lab(49.15, 0.84, -40.32)
CIE-LCH	lch(49.15, 40.33, 271.19°)
OKLab	oklab(56.11% -0.0403 -0.1145)
OKLCH	oklch(56.11% 0.121 250.6)
XYZ	xyz(16.9915, 17.7182, 48.4140)
Luminance	0.1772 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3678B9 #B97736

analogous

#36B9B9 #3678B9 #3636B9

triadic

#3678B9 #B93678 #78B936

tetradic

#3678B9 #B936B9 #B97736 #36B936

square

#3678B9 #B936B9 #B97736 #36B936

split-complementary

#3678B9 #B93636 #B9B936

monochromatic

#1A3B5A #28598A #3678B9 #5D97D0 #8CB5DD

Accessibility & contrast

On white

4.62

#3678B9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.54

#3678B9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3678B9

4.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3678B9	#FFFFFF	#000000	##FFFFFF
##3678B9	1.00	4.62	4.54	4.62
#FFFFFF	4.62	1.00	21.00	1.00
#000000	4.54	21.00	1.00	21.00
##FFFFFF	4.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B7CBC

Deuteranopia (green-blind)

#486FB8

Tritanopia (blue-blind)

#008790

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #3678b9;
/* rgb */ color: rgb(54, 120, 185);
/* oklch */ color: oklch(56.1% 0.121 250.6);

Tailwind

colors: {
  custom: {
    50: '#7d9ece',
    500: '#3678b9',
    950: '#000000',
  },
}

SCSS

$custom: #3678b9;
$custom-light: #7d9ece;
$custom-dark: #000000;

JSON

{
  "hex": "#3678b9",
  "rgb": {
    "r": 54,
    "g": 120,
    "b": 185
  },
  "hsl": {
    "h": 209.771,
    "s": 54.812,
    "l": 46.863
  },
  "oklch": {
    "l": 0.56106,
    "c": 0.12141,
    "h": 250.6
  },
  "luminance": 0.1772
}

Semantic roles & 50–950 ramp

primary

#3678B9

secondary

#C8A583

accent

#934ADE

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #3678B9

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

Preview Lab → · Contrast checker → · Palette generator →