#378BC4#378BC4

#378BC4 is a mid, moderate cyan. Relative luminance 0.233; OKLCH L 61.2% C 0.118 H 242.1°. Best body text is #000000 at 5.65:1 contrast (WCAG AA passes).

Color values

HEX	#378BC4
RGB	rgb(55, 139, 196)
HSL	hsl(204, 56%, 49%)
HSV	hsv(204, 72%, 77%)
CMYK	cmyk(71.9%, 29.1%, 0%, 23.1%)
CIE-LAB	lab(55.34, -6.34, -36.87)
CIE-LCH	lch(55.34, 37.41, 260.24°)
OKLab	oklab(61.17% -0.0551 -0.1042)
OKLCH	oklch(61.17% 0.118 242.1)
XYZ	xyz(20.7681, 23.2606, 55.6091)
Luminance	0.2326 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#378BC4 #C47037

analogous

#37C4B7 #378BC4 #3745C4

triadic

#378BC4 #C4378B #8BC437

tetradic

#378BC4 #B737C4 #C47037 #45C437

square

#378BC4 #B737C4 #C47037 #45C437

split-complementary

#378BC4 #C43745 #C4B737

monochromatic

#1C4764 #2A6994 #378BC4 #65A7D4 #94C2E1

Accessibility & contrast

On white

3.72

#378BC4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.65

#378BC4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #378BC4

5.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##378BC4	#FFFFFF	#000000	##000000
##378BC4	1.00	3.72	5.65	5.65
#FFFFFF	3.72	1.00	21.00	21.00
#000000	5.65	21.00	1.00	1.00
##000000	5.65	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#718CC7

Deuteranopia (green-blind)

#5D7FC3

Tritanopia (blue-blind)

#00999F

Achromatopsia (no color)

#848484

Design tokens & code

CSS

--color: #378bc4;
/* rgb */ color: rgb(55, 139, 196);
/* oklch */ color: oklch(61.2% 0.118 242.1);

Tailwind

colors: {
  custom: {
    50: '#7facd6',
    500: '#378bc4',
    950: '#000000',
  },
}

SCSS

$custom: #378bc4;
$custom-light: #7facd6;
$custom-dark: #000000;

JSON

{
  "hex": "#378bc4",
  "rgb": {
    "r": 55,
    "g": 139,
    "b": 196
  },
  "hsl": {
    "h": 204.255,
    "s": 56.175,
    "l": 49.216
  },
  "oklch": {
    "l": 0.61166,
    "c": 0.11787,
    "h": 242.1
  },
  "luminance": 0.23263
}

Semantic roles & 50–950 ramp

primary

#378BC4

secondary

#CCA58B

accent

#8548DF

background

#F8FAFD

surface

#F0F4FA

border

#CBCED3

text

#0B1014

muted

#7C7F83

Preview Lab

Preview with #378BC4

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

Preview Lab → · Contrast checker → · Palette generator →