#378EB8#378EB8

#378EB8 is a mid, moderate cyan. Relative luminance 0.236; OKLCH L 61.3% C 0.104 H 233.1°. Best body text is #000000 at 5.72:1 contrast (WCAG AA passes).

Color values

HEX	#378EB8
RGB	rgb(55, 142, 184)
HSL	hsl(200, 54%, 47%)
HSV	hsv(200, 70%, 72%)
CMYK	cmyk(70.1%, 22.8%, 0%, 27.8%)
CIE-LAB	lab(55.70, -12.18, -29.48)
CIE-LCH	lch(55.70, 31.90, 247.56°)
OKLab	oklab(61.28% -0.0621 -0.0828)
OKLCH	oklch(61.28% 0.104 233.1)
XYZ	xyz(19.8969, 23.6167, 48.8480)
Luminance	0.2362 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#378EB8 #B86137

analogous

#37B8A2 #378EB8 #374EB8

triadic

#378EB8 #B8378E #8EB837

tetradic

#378EB8 #A237B8 #B86137 #4EB837

square

#378EB8 #A237B8 #B86137 #4EB837

split-complementary

#378EB8 #B8374E #B8A237

monochromatic

#1B455A #296A89 #378EB8 #5DAACF #8DC3DD

Accessibility & contrast

On white

3.67

#378EB8 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.72

#378EB8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #378EB8

5.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##378EB8	#FFFFFF	#000000	##000000
##378EB8	1.00	3.67	5.72	5.72
#FFFFFF	3.67	1.00	21.00	21.00
#000000	5.72	21.00	1.00	1.00
##000000	5.72	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#798DBA

Deuteranopia (green-blind)

#6880B7

Tritanopia (blue-blind)

#00999C

Achromatopsia (no color)

#858585

Design tokens & code

CSS

--color: #378eb8;
/* rgb */ color: rgb(55, 142, 184);
/* oklch */ color: oklch(61.3% 0.104 233.1);

Tailwind

colors: {
  custom: {
    50: '#7eafcd',
    500: '#378eb8',
    950: '#000000',
  },
}

SCSS

$custom: #378eb8;
$custom-light: #7eafcd;
$custom-dark: #000000;

JSON

{
  "hex": "#378eb8",
  "rgb": {
    "r": 55,
    "g": 142,
    "b": 184
  },
  "hsl": {
    "h": 199.535,
    "s": 53.975,
    "l": 46.863
  },
  "oklch": {
    "l": 0.61278,
    "c": 0.10351,
    "h": 233.1
  },
  "luminance": 0.23619
}

Semantic roles & 50–950 ramp

primary

#378EB8

secondary

#C79A84

accent

#7A4ADD

background

#F8FAFC

surface

#EFF4F9

border

#CACED2

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #378EB8

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

Preview Lab → · Contrast checker → · Palette generator →