#378EBB#378EBB

#378EBB is a mid, moderate cyan. Relative luminance 0.237; OKLCH L 61.4% C 0.106 H 235.0°. Best body text is #000000 at 5.75:1 contrast (WCAG AA passes).

Color values

HEX	#378EBB
RGB	rgb(55, 142, 187)
HSL	hsl(200, 55%, 47%)
HSV	hsv(200, 71%, 73%)
CMYK	cmyk(70.6%, 24.1%, 0%, 26.7%)
CIE-LAB	lab(55.83, -11.16, -30.99)
CIE-LCH	lch(55.83, 32.94, 250.20°)
OKLab	oklab(61.42% -0.061 -0.0872)
OKLCH	oklch(61.42% 0.106 235)
XYZ	xyz(20.2147, 23.7438, 50.5217)
Luminance	0.2375 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#378EBB #BB6437

analogous

#37BBA6 #378EBB #374CBB

triadic

#378EBB #BB378E #8EBB37

tetradic

#378EBB #A637BB #BB6437 #4CBB37

square

#378EBB #A637BB #BB6437 #4CBB37

split-complementary

#378EBB #BB374C #BBA637

monochromatic

#1B465C #296A8C #378EBB #5FAAD0 #8EC3DE

Accessibility & contrast

On white

3.65

#378EBB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.75

#378EBB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #378EBB

5.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##378EBB	#FFFFFF	#000000	##000000
##378EBB	1.00	3.65	5.75	5.75
#FFFFFF	3.65	1.00	21.00	21.00
#000000	5.75	21.00	1.00	1.00
##000000	5.75	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#788DBD

Deuteranopia (green-blind)

#6680BA

Tritanopia (blue-blind)

#009A9D

Achromatopsia (no color)

#868686

Design tokens & code

CSS

--color: #378ebb;
/* rgb */ color: rgb(55, 142, 187);
/* oklch */ color: oklch(61.4% 0.106 235.0);

Tailwind

colors: {
  custom: {
    50: '#7eafcf',
    500: '#378ebb',
    950: '#000000',
  },
}

SCSS

$custom: #378ebb;
$custom-light: #7eafcf;
$custom-dark: #000000;

JSON

{
  "hex": "#378ebb",
  "rgb": {
    "r": 55,
    "g": 142,
    "b": 187
  },
  "hsl": {
    "h": 200.455,
    "s": 54.545,
    "l": 47.451
  },
  "oklch": {
    "l": 0.61423,
    "c": 0.10641,
    "h": 235
  },
  "luminance": 0.23746
}

Semantic roles & 50–950 ramp

primary

#378EBB

secondary

#C99C85

accent

#7C4ADE

background

#F8FAFC

surface

#EFF4F9

border

#CACED2

text

#0B1014

muted

#7C7F82

Preview Lab

Preview with #378EBB

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

Preview Lab → · Contrast checker → · Palette generator →