#378FA3#378FA3

#378FA3 is a mid, moderate cyan. Relative luminance 0.231; OKLCH L 60.6% C 0.088 H 215.5°. Best body text is #000000 at 5.62:1 contrast (WCAG AA passes).

Color values

HEX	#378FA3
RGB	rgb(55, 143, 163)
HSL	hsl(191, 50%, 43%)
HSV	hsv(191, 66%, 64%)
CMYK	cmyk(66.3%, 12.3%, 0%, 36.1%)
CIE-LAB	lab(55.17, -19.62, -18.29)
CIE-LCH	lch(55.17, 26.82, 222.98°)
OKLab	oklab(60.58% -0.0712 -0.0509)
OKLCH	oklch(60.58% 0.088 215.5)
XYZ	xyz(18.0061, 23.0995, 38.1529)
Luminance	0.2310 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#378FA3 #A34B37

analogous

#37A381 #378FA3 #3759A3

triadic

#378FA3 #A3378F #8FA337

tetradic

#378FA3 #8137A3 #A34B37 #59A337

square

#378FA3 #8137A3 #A34B37 #59A337

split-complementary

#378FA3 #A33759 #A38137

monochromatic

#183F47 #286775 #378FA3 #52B0C5 #80C5D4

Accessibility & contrast

On white

3.74

#378FA3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.62

#378FA3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #378FA3

5.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##378FA3	#FFFFFF	#000000	##000000
##378FA3	1.00	3.74	5.62	5.62
#FFFFFF	3.74	1.00	21.00	21.00
#000000	5.62	21.00	1.00	1.00
##000000	5.62	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#818BA4

Deuteranopia (green-blind)

#727FA3

Tritanopia (blue-blind)

#009695

Achromatopsia (no color)

#848484

Design tokens & code

CSS

--color: #378fa3;
/* rgb */ color: rgb(55, 143, 163);
/* oklch */ color: oklch(60.6% 0.088 215.5);

Tailwind

colors: {
  custom: {
    50: '#7bb0be',
    500: '#378fa3',
    950: '#000000',
  },
}

SCSS

$custom: #378fa3;
$custom-light: #7bb0be;
$custom-dark: #000000;

JSON

{
  "hex": "#378fa3",
  "rgb": {
    "r": 55,
    "g": 143,
    "b": 163
  },
  "hsl": {
    "h": 191.111,
    "s": 49.541,
    "l": 42.745
  },
  "oklch": {
    "l": 0.60581,
    "c": 0.08752,
    "h": 215.5
  },
  "luminance": 0.23101
}

Semantic roles & 50–950 ramp

primary

#378FA3

secondary

#BE8578

accent

#684FD9

background

#F8FAFB

surface

#EFF4F6

border

#CACED0

text

#0A1012

muted

#7C7F81

Preview Lab

Preview with #378FA3

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

Preview Lab → · Contrast checker → · Palette generator →