#378AC9#378AC9

#378AC9 is a mid, vivid cyan. Relative luminance 0.232; OKLCH L 61.2% C 0.124 H 245.0°. Best body text is #000000 at 5.64:1 contrast (WCAG AA passes).

Color values

HEX	#378AC9
RGB	rgb(55, 138, 201)
HSL	hsl(206, 57%, 50%)
HSV	hsv(206, 73%, 79%)
CMYK	cmyk(72.6%, 31.3%, 0%, 21.2%)
CIE-LAB	lab(55.28, -4.01, -39.79)
CIE-LCH	lch(55.28, 39.99, 264.25°)
OKLab	oklab(61.2% -0.0526 -0.1127)
OKLCH	oklch(61.2% 0.124 245)
XYZ	xyz(21.2026, 23.2038, 58.6084)
Luminance	0.2321 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#378AC9 #C97637

analogous

#37C9BF #378AC9 #3741C9

triadic

#378AC9 #C9378A #8AC937

tetradic

#378AC9 #BF37C9 #C97637 #41C937

square

#378AC9 #BF37C9 #C97637 #41C937

split-complementary

#378AC9 #C93741 #C9BF37

monochromatic

#1C4869 #296999 #378AC9 #67A6D6 #97C2E3

Accessibility & contrast

On white

3.72

#378AC9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.64

#378AC9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #378AC9

5.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##378AC9	#FFFFFF	#000000	##000000
##378AC9	1.00	3.72	5.64	5.64
#FFFFFF	3.72	1.00	21.00	21.00
#000000	5.64	21.00	1.00	1.00
##000000	5.64	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6D8CCC

Deuteranopia (green-blind)

#597EC8

Tritanopia (blue-blind)

#0099A0

Achromatopsia (no color)

#848484

Design tokens & code

CSS

--color: #378ac9;
/* rgb */ color: rgb(55, 138, 201);
/* oklch */ color: oklch(61.2% 0.124 245.0);

Tailwind

colors: {
  custom: {
    50: '#80abd9',
    500: '#378ac9',
    950: '#000000',
  },
}

SCSS

$custom: #378ac9;
$custom-light: #80abd9;
$custom-dark: #000000;

JSON

{
  "hex": "#378ac9",
  "rgb": {
    "r": 55,
    "g": 138,
    "b": 201
  },
  "hsl": {
    "h": 205.89,
    "s": 57.48,
    "l": 50.196
  },
  "oklch": {
    "l": 0.61198,
    "c": 0.12439,
    "h": 245
  },
  "luminance": 0.23206
}

Semantic roles & 50–950 ramp

primary

#378AC9

secondary

#CFA98D

accent

#8947E1

background

#F8FAFD

surface

#F0F4FA

border

#CBCED3

text

#0C1014

muted

#7D7F83

Preview Lab

Preview with #378AC9

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

Preview Lab → · Contrast checker → · Palette generator →