#3678B3#3678B3

#3678B3 is a mid, moderate cyan. Relative luminance 0.175; OKLCH L 55.8% C 0.114 H 248.3°. Best body text is #FFFFFF at 4.67:1 contrast (WCAG AA passes).

Color values

HEX	#3678B3
RGB	rgb(54, 120, 179)
HSL	hsl(208, 54%, 46%)
HSV	hsv(208, 70%, 70%)
CMYK	cmyk(69.8%, 33%, 0%, 29.8%)
CIE-LAB	lab(48.85, -1.32, -37.33)
CIE-LCH	lch(48.85, 37.36, 267.98°)
OKLab	oklab(55.77% -0.042 -0.1058)
OKLCH	oklch(55.77% 0.114 248.3)
XYZ	xyz(16.3714, 17.4701, 45.1484)
Luminance	0.1747 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3678B3 #B37136

analogous

#36B3AF #3678B3 #3639B3

triadic

#3678B3 #B33678 #78B336

tetradic

#3678B3 #AF36B3 #B37136 #39B336

square

#3678B3 #AF36B3 #B37136 #39B336

split-complementary

#3678B3 #B33639 #B3AF36

monochromatic

#1A3955 #285884 #3678B3 #5996CD #88B4DB

Accessibility & contrast

On white

4.67

#3678B3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.49

#3678B3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3678B3

4.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3678B3	#FFFFFF	#000000	##FFFFFF
##3678B3	1.00	4.67	4.49	4.67
#FFFFFF	4.67	1.00	21.00	1.00
#000000	4.49	21.00	1.00	21.00
##FFFFFF	4.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5E7BB6

Deuteranopia (green-blind)

#4C6FB2

Tritanopia (blue-blind)

#00868D

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3678b3;
/* rgb */ color: rgb(54, 120, 179);
/* oklch */ color: oklch(55.8% 0.114 248.3);

Tailwind

colors: {
  custom: {
    50: '#7c9eca',
    500: '#3678b3',
    950: '#000000',
  },
}

SCSS

$custom: #3678b3;
$custom-light: #7c9eca;
$custom-dark: #000000;

JSON

{
  "hex": "#3678b3",
  "rgb": {
    "r": 54,
    "g": 120,
    "b": 179
  },
  "hsl": {
    "h": 208.32,
    "s": 53.648,
    "l": 45.686
  },
  "oklch": {
    "l": 0.55766,
    "c": 0.11384,
    "h": 248.3
  },
  "luminance": 0.17472
}

Semantic roles & 50–950 ramp

primary

#3678B3

secondary

#C5A080

accent

#904BDD

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #3678B3

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

Preview Lab → · Contrast checker → · Palette generator →