#378EB4#378EB4

#378EB4 is a mid, moderate cyan. Relative luminance 0.235; OKLCH L 61.1% C 0.100 H 230.5°. Best body text is #000000 at 5.69:1 contrast (WCAG AA passes).

Color values

HEX	#378EB4
RGB	rgb(55, 142, 180)
HSL	hsl(198, 53%, 46%)
HSV	hsv(198, 69%, 71%)
CMYK	cmyk(69.4%, 21.1%, 0%, 29.4%)
CIE-LAB	lab(55.53, -13.52, -27.46)
CIE-LCH	lch(55.53, 30.61, 243.78°)
OKLab	oklab(61.09% -0.0635 -0.077)
OKLCH	oklch(61.09% 0.1 230.5)
XYZ	xyz(19.4835, 23.4514, 46.6709)
Luminance	0.2345 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#378EB4 #B45D37

analogous

#37B49B #378EB4 #374FB4

triadic

#378EB4 #B4378E #8EB437

tetradic

#378EB4 #9B37B4 #B45D37 #4FB437

square

#378EB4 #9B37B4 #B45D37 #4FB437

split-complementary

#378EB4 #B4374F #B49B37

monochromatic

#1A4456 #296985 #378EB4 #5BAACD #8AC3DB

Accessibility & contrast

On white

3.69

#378EB4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.69

#378EB4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #378EB4

5.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##378EB4	#FFFFFF	#000000	##000000
##378EB4	1.00	3.69	5.69	5.69
#FFFFFF	3.69	1.00	21.00	21.00
#000000	5.69	21.00	1.00	1.00
##000000	5.69	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7B8CB6

Deuteranopia (green-blind)

#6A80B3

Tritanopia (blue-blind)

#00989B

Achromatopsia (no color)

#858585

Design tokens & code

CSS

--color: #378eb4;
/* rgb */ color: rgb(55, 142, 180);
/* oklch */ color: oklch(61.1% 0.100 230.5);

Tailwind

colors: {
  custom: {
    50: '#7dafca',
    500: '#378eb4',
    950: '#000000',
  },
}

SCSS

$custom: #378eb4;
$custom-light: #7dafca;
$custom-dark: #000000;

JSON

{
  "hex": "#378eb4",
  "rgb": {
    "r": 55,
    "g": 142,
    "b": 180
  },
  "hsl": {
    "h": 198.24,
    "s": 53.191,
    "l": 46.078
  },
  "oklch": {
    "l": 0.61089,
    "c": 0.09984,
    "h": 230.5
  },
  "luminance": 0.23454
}

Semantic roles & 50–950 ramp

primary

#378EB4

secondary

#C69681

accent

#774BDD

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #378EB4

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

Preview Lab → · Contrast checker → · Palette generator →