#378CA3#378CA3

#378CA3 is a mid, moderate cyan. Relative luminance 0.222; OKLCH L 59.8% C 0.087 H 218.9°. Best body text is #000000 at 5.44:1 contrast (WCAG AA passes).

Color values

HEX	#378CA3
RGB	rgb(55, 140, 163)
HSL	hsl(193, 50%, 43%)
HSV	hsv(193, 66%, 64%)
CMYK	cmyk(66.3%, 14.1%, 0%, 36.1%)
CIE-LAB	lab(54.25, -18.02, -19.70)
CIE-LCH	lch(54.25, 26.70, 227.55°)
OKLab	oklab(59.84% -0.068 -0.0549)
OKLCH	oklch(59.84% 0.087 218.9)
XYZ	xyz(17.5618, 22.2108, 38.0048)
Luminance	0.2221 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#378CA3 #A34E37

analogous

#37A384 #378CA3 #3756A3

triadic

#378CA3 #A3378C #8CA337

tetradic

#378CA3 #8437A3 #A34E37 #56A337

square

#378CA3 #8437A3 #A34E37 #56A337

split-complementary

#378CA3 #A33756 #A38437

monochromatic

#183D47 #286575 #378CA3 #52ACC5 #80C2D4

Accessibility & contrast

On white

3.86

#378CA3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.44

#378CA3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #378CA3

5.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##378CA3	#FFFFFF	#000000	##000000
##378CA3	1.00	3.86	5.44	5.44
#FFFFFF	3.86	1.00	21.00	21.00
#000000	5.44	21.00	1.00	1.00
##000000	5.44	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7D88A4

Deuteranopia (green-blind)

#6E7DA3

Tritanopia (blue-blind)

#009493

Achromatopsia (no color)

#828282

Design tokens & code

CSS

--color: #378ca3;
/* rgb */ color: rgb(55, 140, 163);
/* oklch */ color: oklch(59.8% 0.087 218.9);

Tailwind

colors: {
  custom: {
    50: '#7badbe',
    500: '#378ca3',
    950: '#000000',
  },
}

SCSS

$custom: #378ca3;
$custom-light: #7badbe;
$custom-dark: #000000;

JSON

{
  "hex": "#378ca3",
  "rgb": {
    "r": 55,
    "g": 140,
    "b": 163
  },
  "hsl": {
    "h": 192.778,
    "s": 49.541,
    "l": 42.745
  },
  "oklch": {
    "l": 0.59839,
    "c": 0.08736,
    "h": 218.9
  },
  "luminance": 0.22213
}

Semantic roles & 50–950 ramp

primary

#378CA3

secondary

#BE8778

accent

#6C4FD9

background

#F7FAFB

surface

#EEF4F6

border

#C9CED0

text

#0A1012

muted

#7C7F81

Preview Lab

Preview with #378CA3

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

Preview Lab → · Contrast checker → · Palette generator →