#378EA3#378EA3

#378EA3 is a mid, moderate cyan. Relative luminance 0.228; OKLCH L 60.3% C 0.087 H 216.7°. Best body text is #000000 at 5.56:1 contrast (WCAG AA passes).

Color values

HEX	#378EA3
RGB	rgb(55, 142, 163)
HSL	hsl(192, 50%, 43%)
HSV	hsv(192, 66%, 64%)
CMYK	cmyk(66.3%, 12.9%, 0%, 36.1%)
CIE-LAB	lab(54.87, -19.09, -18.76)
CIE-LCH	lch(54.87, 26.76, 224.49°)
OKLab	oklab(60.33% -0.0701 -0.0522)
OKLCH	oklch(60.33% 0.087 216.7)
XYZ	xyz(17.8567, 22.8006, 38.1031)
Luminance	0.2280 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#378EA3 #A34C37

analogous

#37A382 #378EA3 #3758A3

triadic

#378EA3 #A3378E #8EA337

tetradic

#378EA3 #8237A3 #A34C37 #58A337

square

#378EA3 #8237A3 #A34C37 #58A337

split-complementary

#378EA3 #A33758 #A38237

monochromatic

#183E47 #286675 #378EA3 #52AFC5 #80C4D4

Accessibility & contrast

On white

3.78

#378EA3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.56

#378EA3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #378EA3

5.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##378EA3	#FFFFFF	#000000	##000000
##378EA3	1.00	3.78	5.56	5.56
#FFFFFF	3.78	1.00	21.00	21.00
#000000	5.56	21.00	1.00	1.00
##000000	5.56	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#808AA4

Deuteranopia (green-blind)

#707EA3

Tritanopia (blue-blind)

#009695

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #378ea3;
/* rgb */ color: rgb(55, 142, 163);
/* oklch */ color: oklch(60.3% 0.087 216.7);

Tailwind

colors: {
  custom: {
    50: '#7bafbe',
    500: '#378ea3',
    950: '#000000',
  },
}

SCSS

$custom: #378ea3;
$custom-light: #7bafbe;
$custom-dark: #000000;

JSON

{
  "hex": "#378ea3",
  "rgb": {
    "r": 55,
    "g": 142,
    "b": 163
  },
  "hsl": {
    "h": 191.667,
    "s": 49.541,
    "l": 42.745
  },
  "oklch": {
    "l": 0.60334,
    "c": 0.08743,
    "h": 216.7
  },
  "luminance": 0.22803
}

Semantic roles & 50–950 ramp

primary

#378EA3

secondary

#BE8678

accent

#6A4FD9

background

#F8FAFB

surface

#EFF4F6

border

#CACED0

text

#0A1012

muted

#7C7F81

Preview Lab

Preview with #378EA3

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

Preview Lab → · Contrast checker → · Palette generator →