#378FC9#378FC9

#378FC9 is a light, vivid cyan. Relative luminance 0.247; OKLCH L 62.4% C 0.120 H 241.6°. Best body text is #000000 at 5.93:1 contrast (WCAG AA passes).

Color values

HEX	#378FC9
RGB	rgb(55, 143, 201)
HSL	hsl(204, 57%, 50%)
HSV	hsv(204, 73%, 79%)
CMYK	cmyk(72.6%, 28.9%, 0%, 21.2%)
CIE-LAB	lab(56.75, -6.90, -37.48)
CIE-LCH	lch(56.75, 38.11, 259.57°)
OKLab	oklab(62.36% -0.0574 -0.1059)
OKLCH	oklch(62.36% 0.12 241.6)
XYZ	xyz(21.9365, 24.6717, 58.8530)
Luminance	0.2467 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#378FC9 #C97137

analogous

#37C9BA #378FC9 #3746C9

triadic

#378FC9 #C9378F #8FC937

tetradic

#378FC9 #BA37C9 #C97137 #46C937

square

#378FC9 #BA37C9 #C97137 #46C937

split-complementary

#378FC9 #C93746 #C9BA37

monochromatic

#1C4B69 #296D99 #378FC9 #67AAD6 #97C5E3

Accessibility & contrast

On white

3.54

#378FC9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.93

#378FC9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #378FC9

5.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##378FC9	#FFFFFF	#000000	##000000
##378FC9	1.00	3.54	5.93	5.93
#FFFFFF	3.54	1.00	21.00	21.00
#000000	5.93	21.00	1.00	1.00
##000000	5.93	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7490CC

Deuteranopia (green-blind)

#6082C8

Tritanopia (blue-blind)

#009DA3

Achromatopsia (no color)

#888888

Design tokens & code

CSS

--color: #378fc9;
/* rgb */ color: rgb(55, 143, 201);
/* oklch */ color: oklch(62.4% 0.120 241.6);

Tailwind

colors: {
  custom: {
    50: '#80afd9',
    500: '#378fc9',
    950: '#000000',
  },
}

SCSS

$custom: #378fc9;
$custom-light: #80afd9;
$custom-dark: #000000;

JSON

{
  "hex": "#378fc9",
  "rgb": {
    "r": 55,
    "g": 143,
    "b": 201
  },
  "hsl": {
    "h": 203.836,
    "s": 57.48,
    "l": 50.196
  },
  "oklch": {
    "l": 0.62362,
    "c": 0.12048,
    "h": 241.6
  },
  "luminance": 0.24674
}

Semantic roles & 50–950 ramp

primary

#378FC9

secondary

#CFA78D

accent

#8447E1

background

#F8FAFD

surface

#F0F4FA

border

#CBCED3

text

#0C1014

muted

#7D7F83

Preview Lab

Preview with #378FC9

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

Preview Lab → · Contrast checker → · Palette generator →