#378AB5#378AB5

#378AB5 is a mid, moderate cyan. Relative luminance 0.223; OKLCH L 60.2% C 0.103 H 234.8°. Best body text is #000000 at 5.47:1 contrast (WCAG AA passes).

Color values

HEX	#378AB5
RGB	rgb(55, 138, 181)
HSL	hsl(200, 53%, 46%)
HSV	hsv(200, 70%, 71%)
CMYK	cmyk(69.6%, 23.8%, 0%, 29%)
CIE-LAB	lab(54.37, -10.95, -29.84)
CIE-LCH	lch(54.37, 31.79, 249.85°)
OKLab	oklab(60.17% -0.0591 -0.0839)
OKLCH	oklch(60.17% 0.103 234.8)
XYZ	xyz(19.0012, 22.3233, 47.0145)
Luminance	0.2233 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#378AB5 #B56237

analogous

#37B5A1 #378AB5 #374BB5

triadic

#378AB5 #B5378A #8AB537

tetradic

#378AB5 #A137B5 #B56237 #4BB537

square

#378AB5 #A137B5 #B56237 #4BB537

split-complementary

#378AB5 #B5374B #B5A137

monochromatic

#1A4257 #296686 #378AB5 #5CA7CD #8BC0DC

Accessibility & contrast

On white

3.84

#378AB5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.47

#378AB5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #378AB5

5.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##378AB5	#FFFFFF	#000000	##000000
##378AB5	1.00	3.84	5.47	5.47
#FFFFFF	3.84	1.00	21.00	21.00
#000000	5.47	21.00	1.00	1.00
##000000	5.47	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7589B7

Deuteranopia (green-blind)

#647DB4

Tritanopia (blue-blind)

#009599

Achromatopsia (no color)

#828282

Design tokens & code

CSS

--color: #378ab5;
/* rgb */ color: rgb(55, 138, 181);
/* oklch */ color: oklch(60.2% 0.103 234.8);

Tailwind

colors: {
  custom: {
    50: '#7daccb',
    500: '#378ab5',
    950: '#000000',
  },
}

SCSS

$custom: #378ab5;
$custom-light: #7daccb;
$custom-dark: #000000;

JSON

{
  "hex": "#378ab5",
  "rgb": {
    "r": 55,
    "g": 138,
    "b": 181
  },
  "hsl": {
    "h": 200.476,
    "s": 53.39,
    "l": 46.275
  },
  "oklch": {
    "l": 0.60174,
    "c": 0.10259,
    "h": 234.8
  },
  "luminance": 0.22325
}

Semantic roles & 50–950 ramp

primary

#378AB5

secondary

#C69982

accent

#7D4BDD

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #378AB5

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

Preview Lab → · Contrast checker → · Palette generator →