#378CC3#378CC3

#378CC3 is a mid, moderate cyan. Relative luminance 0.235; OKLCH L 61.3% C 0.116 H 240.9°. Best body text is #000000 at 5.70:1 contrast (WCAG AA passes).

Color values

HEX	#378CC3
RGB	rgb(55, 140, 195)
HSL	hsl(204, 56%, 49%)
HSV	hsv(204, 72%, 76%)
CMYK	cmyk(71.8%, 28.2%, 0%, 23.5%)
CIE-LAB	lab(55.59, -7.27, -35.91)
CIE-LCH	lch(55.59, 36.64, 258.56°)
OKLab	oklab(61.35% -0.0564 -0.1014)
OKLCH	oklch(61.35% 0.116 240.9)
XYZ	xyz(20.8001, 23.5062, 55.0601)
Luminance	0.2351 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#378CC3 #C36E37

analogous

#37C3B4 #378CC3 #3746C3

triadic

#378CC3 #C3378C #8CC337

tetradic

#378CC3 #B437C3 #C36E37 #46C337

square

#378CC3 #B437C3 #C36E37 #46C337

split-complementary

#378CC3 #C33746 #C3B437

monochromatic

#1C4764 #2A6A93 #378CC3 #64A8D3 #94C2E1

Accessibility & contrast

On white

3.68

#378CC3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.70

#378CC3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #378CC3

5.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##378CC3	#FFFFFF	#000000	##000000
##378CC3	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)

#738DC5

Deuteranopia (green-blind)

#5F7FC2

Tritanopia (blue-blind)

#009A9F

Achromatopsia (no color)

#858585

Design tokens & code

CSS

--color: #378cc3;
/* rgb */ color: rgb(55, 140, 195);
/* oklch */ color: oklch(61.3% 0.116 240.9);

Tailwind

colors: {
  custom: {
    50: '#7fadd5',
    500: '#378cc3',
    950: '#000000',
  },
}

SCSS

$custom: #378cc3;
$custom-light: #7fadd5;
$custom-dark: #000000;

JSON

{
  "hex": "#378cc3",
  "rgb": {
    "r": 55,
    "g": 140,
    "b": 195
  },
  "hsl": {
    "h": 203.571,
    "s": 56,
    "l": 49.02
  },
  "oklch": {
    "l": 0.61349,
    "c": 0.11602,
    "h": 240.9
  },
  "luminance": 0.23509
}

Semantic roles & 50–950 ramp

primary

#378CC3

secondary

#CCA48A

accent

#8449DF

background

#F8FAFD

surface

#F0F4FA

border

#CBCED3

text

#0B1014

muted

#7C7F83

Preview Lab

Preview with #378CC3

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

Preview Lab → · Contrast checker → · Palette generator →