#378EB5#378EB5

#378EB5 is a mid, moderate cyan. Relative luminance 0.235; OKLCH L 61.1% C 0.101 H 231.2°. Best body text is #000000 at 5.70:1 contrast (WCAG AA passes).

Color values

HEX	#378EB5
RGB	rgb(55, 142, 181)
HSL	hsl(199, 53%, 46%)
HSV	hsv(199, 70%, 71%)
CMYK	cmyk(69.6%, 21.5%, 0%, 29%)
CIE-LAB	lab(55.58, -13.19, -27.97)
CIE-LCH	lch(55.58, 30.92, 244.75°)
OKLab	oklab(61.14% -0.0632 -0.0785)
OKLCH	oklch(61.14% 0.101 231.2)
XYZ	xyz(19.5857, 23.4923, 47.2093)
Luminance	0.2349 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#378EB5 #B55E37

analogous

#37B59D #378EB5 #374FB5

triadic

#378EB5 #B5378E #8EB537

tetradic

#378EB5 #9D37B5 #B55E37 #4FB537

square

#378EB5 #9D37B5 #B55E37 #4FB537

split-complementary

#378EB5 #B5374F #B59D37

monochromatic

#1A4457 #296986 #378EB5 #5CAACD #8BC3DC

Accessibility & contrast

On white

3.68

#378EB5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.70

#378EB5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #378EB5

5.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##378EB5	#FFFFFF	#000000	##000000
##378EB5	1.00	3.68	5.70	5.70
#FFFFFF	3.68	1.00	21.00	21.00
#000000	5.70	21.00	1.00	1.00
##000000	5.70	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7A8CB7

Deuteranopia (green-blind)

#6980B4

Tritanopia (blue-blind)

#00999B

Achromatopsia (no color)

#858585

Design tokens & code

CSS

--color: #378eb5;
/* rgb */ color: rgb(55, 142, 181);
/* oklch */ color: oklch(61.1% 0.101 231.2);

Tailwind

colors: {
  custom: {
    50: '#7dafcb',
    500: '#378eb5',
    950: '#000000',
  },
}

SCSS

$custom: #378eb5;
$custom-light: #7dafcb;
$custom-dark: #000000;

JSON

{
  "hex": "#378eb5",
  "rgb": {
    "r": 55,
    "g": 142,
    "b": 181
  },
  "hsl": {
    "h": 198.571,
    "s": 53.39,
    "l": 46.275
  },
  "oklch": {
    "l": 0.61136,
    "c": 0.10074,
    "h": 231.2
  },
  "luminance": 0.23494
}

Semantic roles & 50–950 ramp

primary

#378EB5

secondary

#C69782

accent

#784BDD

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #378EB5

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

Preview Lab → · Contrast checker → · Palette generator →