#378CB3#378CB3

#378CB3 is a mid, moderate cyan. Relative luminance 0.228; OKLCH L 60.6% C 0.100 H 231.7°. Best body text is #000000 at 5.56:1 contrast (WCAG AA passes).

Color values

HEX	#378CB3
RGB	rgb(55, 140, 179)
HSL	hsl(199, 53%, 46%)
HSV	hsv(199, 69%, 70%)
CMYK	cmyk(69.3%, 21.8%, 0%, 29.8%)
CIE-LAB	lab(54.89, -12.75, -27.89)
CIE-LCH	lch(54.89, 30.67, 245.43°)
OKLab	oklab(60.56% -0.0618 -0.0783)
OKLCH	oklch(60.56% 0.1 231.7)
XYZ	xyz(19.0871, 22.8210, 46.0380)
Luminance	0.2282 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#378CB3 #B35E37

analogous

#37B39C #378CB3 #374EB3

triadic

#378CB3 #B3378C #8CB337

tetradic

#378CB3 #9C37B3 #B35E37 #4EB337

square

#378CB3 #9C37B3 #B35E37 #4EB337

split-complementary

#378CB3 #B3374E #B39C37

monochromatic

#1A4355 #296784 #378CB3 #5BA9CD #8AC1DB

Accessibility & contrast

On white

3.77

#378CB3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.56

#378CB3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #378CB3

5.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##378CB3	#FFFFFF	#000000	##000000
##378CB3	1.00	3.77	5.56	5.56
#FFFFFF	3.77	1.00	21.00	21.00
#000000	5.56	21.00	1.00	1.00
##000000	5.56	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#798AB5

Deuteranopia (green-blind)

#677EB2

Tritanopia (blue-blind)

#009799

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #378cb3;
/* rgb */ color: rgb(55, 140, 179);
/* oklch */ color: oklch(60.6% 0.100 231.7);

Tailwind

colors: {
  custom: {
    50: '#7dadca',
    500: '#378cb3',
    950: '#000000',
  },
}

SCSS

$custom: #378cb3;
$custom-light: #7dadca;
$custom-dark: #000000;

JSON

{
  "hex": "#378cb3",
  "rgb": {
    "r": 55,
    "g": 140,
    "b": 179
  },
  "hsl": {
    "h": 198.871,
    "s": 52.991,
    "l": 45.882
  },
  "oklch": {
    "l": 0.6056,
    "c": 0.09974,
    "h": 231.7
  },
  "luminance": 0.22823
}

Semantic roles & 50–950 ramp

primary

#378CB3

secondary

#C59681

accent

#794BDC

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #378CB3

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

Preview Lab → · Contrast checker → · Palette generator →