#378CB5#378CB5

#378CB5 is a mid, moderate cyan. Relative luminance 0.229; OKLCH L 60.7% C 0.102 H 233.0°. Best body text is #000000 at 5.58:1 contrast (WCAG AA passes).

Color values

HEX	#378CB5
RGB	rgb(55, 140, 181)
HSL	hsl(200, 53%, 46%)
HSV	hsv(200, 70%, 71%)
CMYK	cmyk(69.6%, 22.7%, 0%, 29%)
CIE-LAB	lab(54.97, -12.08, -28.90)
CIE-LCH	lch(54.97, 31.33, 247.33°)
OKLab	oklab(60.65% -0.0611 -0.0812)
OKLCH	oklch(60.65% 0.102 233)
XYZ	xyz(19.2908, 22.9025, 47.1110)
Luminance	0.2291 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#378CB5 #B56037

analogous

#37B59F #378CB5 #374DB5

triadic

#378CB5 #B5378C #8CB537

tetradic

#378CB5 #9F37B5 #B56037 #4DB537

square

#378CB5 #9F37B5 #B56037 #4DB537

split-complementary

#378CB5 #B5374D #B59F37

monochromatic

#1A4357 #296886 #378CB5 #5CA8CD #8BC1DC

Accessibility & contrast

On white

3.76

#378CB5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.58

#378CB5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #378CB5

5.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##378CB5	#FFFFFF	#000000	##000000
##378CB5	1.00	3.76	5.58	5.58
#FFFFFF	3.76	1.00	21.00	21.00
#000000	5.58	21.00	1.00	1.00
##000000	5.58	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#788BB7

Deuteranopia (green-blind)

#677EB4

Tritanopia (blue-blind)

#00979A

Achromatopsia (no color)

#848484

Design tokens & code

CSS

--color: #378cb5;
/* rgb */ color: rgb(55, 140, 181);
/* oklch */ color: oklch(60.7% 0.102 233.0);

Tailwind

colors: {
  custom: {
    50: '#7dadcb',
    500: '#378cb5',
    950: '#000000',
  },
}

SCSS

$custom: #378cb5;
$custom-light: #7dadcb;
$custom-dark: #000000;

JSON

{
  "hex": "#378cb5",
  "rgb": {
    "r": 55,
    "g": 140,
    "b": 181
  },
  "hsl": {
    "h": 199.524,
    "s": 53.39,
    "l": 46.275
  },
  "oklch": {
    "l": 0.60654,
    "c": 0.10161,
    "h": 233
  },
  "luminance": 0.22905
}

Semantic roles & 50–950 ramp

primary

#378CB5

secondary

#C69882

accent

#7A4BDD

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #378CB5

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

Preview Lab → · Contrast checker → · Palette generator →