#378DD9#378DD9

#378DD9 is a light, vivid cyan. Relative luminance 0.249; OKLCH L 62.8% C 0.141 H 248.8°. Best body text is #000000 at 5.97:1 contrast (WCAG AA passes).

Color values

HEX	#378DD9
RGB	rgb(55, 141, 217)
HSL	hsl(208, 68%, 53%)
HSV	hsv(208, 75%, 85%)
CMYK	cmyk(74.7%, 35%, 0%, 14.9%)
CIE-LAB	lab(56.95, -0.08, -46.17)
CIE-LCH	lch(56.95, 46.17, 269.91°)
OKLab	oklab(62.77% -0.0509 -0.1313)
OKLCH	oklch(62.77% 0.141 248.8)
XYZ	xyz(23.6201, 24.8690, 69.1875)
Luminance	0.2487 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#378DD9 #D98337

analogous

#37D9D4 #378DD9 #373CD9

triadic

#378DD9 #D9378D #8DD937

tetradic

#378DD9 #D437D9 #D98337 #3CD937

square

#378DD9 #D437D9 #D98337 #3CD937

split-complementary

#378DD9 #D9373C #D9D437

monochromatic

#184E7E #226EB1 #378DD9 #6AAAE3 #9EC8ED

Accessibility & contrast

On white

3.51

#378DD9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.97

#378DD9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #378DD9

5.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##378DD9	#FFFFFF	#000000	##000000
##378DD9	1.00	3.51	5.97	5.97
#FFFFFF	3.51	1.00	21.00	21.00
#000000	5.97	21.00	1.00	1.00
##000000	5.97	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6A91DC

Deuteranopia (green-blind)

#5282D8

Tritanopia (blue-blind)

#009FA9

Achromatopsia (no color)

#898989

Design tokens & code

CSS

--color: #378dd9;
/* rgb */ color: rgb(55, 141, 217);
/* oklch */ color: oklch(62.8% 0.141 248.8);

Tailwind

colors: {
  custom: {
    50: '#83ade5',
    500: '#378dd9',
    950: '#000000',
  },
}

SCSS

$custom: #378dd9;
$custom-light: #83ade5;
$custom-dark: #000000;

JSON

{
  "hex": "#378dd9",
  "rgb": {
    "r": 55,
    "g": 141,
    "b": 217
  },
  "hsl": {
    "h": 208.148,
    "s": 68.067,
    "l": 53.333
  },
  "oklch": {
    "l": 0.62769,
    "c": 0.14083,
    "h": 248.8
  },
  "luminance": 0.24872
}

Semantic roles & 50–950 ramp

primary

#378DD9

secondary

#D9B493

accent

#8F3DEB

background

#F8FAFE

surface

#F0F4FC

border

#CBCED5

text

#0C1016

muted

#7D7F84

Preview Lab

Preview with #378DD9

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

Preview Lab → · Contrast checker → · Palette generator →