#378BB5#378BB5

#378BB5 is a mid, moderate cyan. Relative luminance 0.226; OKLCH L 60.4% C 0.102 H 233.9°. Best body text is #000000 at 5.52:1 contrast (WCAG AA passes).

Color values

HEX	#378BB5
RGB	rgb(55, 139, 181)
HSL	hsl(200, 53%, 46%)
HSV	hsv(200, 70%, 71%)
CMYK	cmyk(69.6%, 23.2%, 0%, 29%)
CIE-LAB	lab(54.67, -11.51, -29.37)
CIE-LCH	lch(54.67, 31.55, 248.59°)
OKLab	oklab(60.41% -0.0601 -0.0825)
OKLCH	oklch(60.41% 0.102 233.9)
XYZ	xyz(19.1454, 22.6115, 47.0626)
Luminance	0.2261 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#378BB5 #B56137

analogous

#37B5A0 #378BB5 #374CB5

triadic

#378BB5 #B5378B #8BB537

tetradic

#378BB5 #A037B5 #B56137 #4CB537

square

#378BB5 #A037B5 #B56137 #4CB537

split-complementary

#378BB5 #B5374C #B5A037

monochromatic

#1A4357 #296786 #378BB5 #5CA8CD #8BC1DC

Accessibility & contrast

On white

3.80

#378BB5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.52

#378BB5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #378BB5

5.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##378BB5	#FFFFFF	#000000	##000000
##378BB5	1.00	3.80	5.52	5.52
#FFFFFF	3.80	1.00	21.00	21.00
#000000	5.52	21.00	1.00	1.00
##000000	5.52	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#778AB7

Deuteranopia (green-blind)

#657DB4

Tritanopia (blue-blind)

#009699

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #378bb5;
/* rgb */ color: rgb(55, 139, 181);
/* oklch */ color: oklch(60.4% 0.102 233.9);

Tailwind

colors: {
  custom: {
    50: '#7daccb',
    500: '#378bb5',
    950: '#000000',
  },
}

SCSS

$custom: #378bb5;
$custom-light: #7daccb;
$custom-dark: #000000;

JSON

{
  "hex": "#378bb5",
  "rgb": {
    "r": 55,
    "g": 139,
    "b": 181
  },
  "hsl": {
    "h": 200,
    "s": 53.39,
    "l": 46.275
  },
  "oklch": {
    "l": 0.60414,
    "c": 0.10209,
    "h": 233.9
  },
  "luminance": 0.22614
}

Semantic roles & 50–950 ramp

primary

#378BB5

secondary

#C69982

accent

#7C4BDD

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #378BB5

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

Preview Lab → · Contrast checker → · Palette generator →