#3678B8#3678B8

#3678B8 is a mid, vivid cyan. Relative luminance 0.177; OKLCH L 56.0% C 0.120 H 250.2°. Best body text is #FFFFFF at 4.63:1 contrast (WCAG AA passes).

Color values

HEX	#3678B8
RGB	rgb(54, 120, 184)
HSL	hsl(210, 55%, 47%)
HSV	hsv(210, 71%, 72%)
CMYK	cmyk(70.7%, 34.8%, 0%, 27.8%)
CIE-LAB	lab(49.10, 0.48, -39.82)
CIE-LCH	lch(49.10, 39.83, 270.69°)
OKLab	oklab(56.05% -0.0406 -0.1131)
OKLCH	oklch(56.05% 0.12 250.2)
XYZ	xyz(16.8863, 17.6761, 47.8600)
Luminance	0.1768 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3678B8 #B87636

analogous

#36B8B7 #3678B8 #3637B8

triadic

#3678B8 #B83678 #78B836

tetradic

#3678B8 #B736B8 #B87636 #37B836

square

#3678B8 #B736B8 #B87636 #37B836

split-complementary

#3678B8 #B83637 #B8B736

monochromatic

#1A3A59 #285989 #3678B8 #5C96CF #8BB5DD

Accessibility & contrast

On white

4.63

#3678B8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.54

#3678B8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3678B8

4.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3678B8	#FFFFFF	#000000	##FFFFFF
##3678B8	1.00	4.63	4.54	4.63
#FFFFFF	4.63	1.00	21.00	1.00
#000000	4.54	21.00	1.00	21.00
##FFFFFF	4.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B7BBB

Deuteranopia (green-blind)

#496FB7

Tritanopia (blue-blind)

#00878F

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #3678b8;
/* rgb */ color: rgb(54, 120, 184);
/* oklch */ color: oklch(56.0% 0.120 250.2);

Tailwind

colors: {
  custom: {
    50: '#7c9ecd',
    500: '#3678b8',
    950: '#000000',
  },
}

SCSS

$custom: #3678b8;
$custom-light: #7c9ecd;
$custom-dark: #000000;

JSON

{
  "hex": "#3678b8",
  "rgb": {
    "r": 54,
    "g": 120,
    "b": 184
  },
  "hsl": {
    "h": 209.538,
    "s": 54.622,
    "l": 46.667
  },
  "oklch": {
    "l": 0.56049,
    "c": 0.12014,
    "h": 250.2
  },
  "luminance": 0.17678
}

Semantic roles & 50–950 ramp

primary

#3678B8

secondary

#C7A482

accent

#934ADE

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #3678B8

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

Preview Lab → · Contrast checker → · Palette generator →