#378EC9#378EC9

#378EC9 is a light, vivid cyan. Relative luminance 0.244; OKLCH L 62.1% C 0.121 H 242.3°. Best body text is #000000 at 5.88:1 contrast (WCAG AA passes).

Color values

HEX	#378EC9
RGB	rgb(55, 142, 201)
HSL	hsl(204, 57%, 50%)
HSV	hsv(204, 73%, 79%)
CMYK	cmyk(72.6%, 29.4%, 0%, 21.2%)
CIE-LAB	lab(56.46, -6.32, -37.94)
CIE-LCH	lch(56.46, 38.46, 260.54°)
OKLab	oklab(62.13% -0.0564 -0.1073)
OKLCH	oklch(62.13% 0.121 242.3)
XYZ	xyz(21.7871, 24.3728, 58.8032)
Luminance	0.2437 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#378EC9 #C97237

analogous

#37C9BB #378EC9 #3745C9

triadic

#378EC9 #C9378E #8EC937

tetradic

#378EC9 #BB37C9 #C97237 #45C937

square

#378EC9 #BB37C9 #C97237 #45C937

split-complementary

#378EC9 #C93745 #C9BB37

monochromatic

#1C4A69 #296C99 #378EC9 #67A9D6 #97C4E3

Accessibility & contrast

On white

3.57

#378EC9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.88

#378EC9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #378EC9

5.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##378EC9	#FFFFFF	#000000	##000000
##378EC9	1.00	3.57	5.88	5.88
#FFFFFF	3.57	1.00	21.00	21.00
#000000	5.88	21.00	1.00	1.00
##000000	5.88	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#738FCC

Deuteranopia (green-blind)

#5F81C8

Tritanopia (blue-blind)

#009DA3

Achromatopsia (no color)

#878787

Design tokens & code

CSS

--color: #378ec9;
/* rgb */ color: rgb(55, 142, 201);
/* oklch */ color: oklch(62.1% 0.121 242.3);

Tailwind

colors: {
  custom: {
    50: '#80aed9',
    500: '#378ec9',
    950: '#000000',
  },
}

SCSS

$custom: #378ec9;
$custom-light: #80aed9;
$custom-dark: #000000;

JSON

{
  "hex": "#378ec9",
  "rgb": {
    "r": 55,
    "g": 142,
    "b": 201
  },
  "hsl": {
    "h": 204.247,
    "s": 57.48,
    "l": 50.196
  },
  "oklch": {
    "l": 0.62129,
    "c": 0.12123,
    "h": 242.3
  },
  "luminance": 0.24375
}

Semantic roles & 50–950 ramp

primary

#378EC9

secondary

#CFA88D

accent

#8547E1

background

#F8FAFD

surface

#F0F4FA

border

#CBCED3

text

#0C1014

muted

#7D7F83

Preview Lab

Preview with #378EC9

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

Preview Lab → · Contrast checker → · Palette generator →