#378AB3#378AB3

#378AB3 is a mid, moderate cyan. Relative luminance 0.222; OKLCH L 60.1% C 0.101 H 233.6°. Best body text is #000000 at 5.45:1 contrast (WCAG AA passes).

Color values

HEX	#378AB3
RGB	rgb(55, 138, 179)
HSL	hsl(200, 53%, 46%)
HSV	hsv(200, 69%, 70%)
CMYK	cmyk(69.3%, 22.9%, 0%, 29.8%)
CIE-LAB	lab(54.28, -11.63, -28.83)
CIE-LCH	lch(54.28, 31.09, 248.03°)
OKLab	oklab(60.08% -0.0598 -0.081)
OKLCH	oklch(60.08% 0.101 233.6)
XYZ	xyz(18.7975, 22.2418, 45.9415)
Luminance	0.2224 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#378AB3 #B36037

analogous

#37B39E #378AB3 #374CB3

triadic

#378AB3 #B3378A #8AB337

tetradic

#378AB3 #9E37B3 #B36037 #4CB337

square

#378AB3 #9E37B3 #B36037 #4CB337

split-complementary

#378AB3 #B3374C #B39E37

monochromatic

#1A4255 #296684 #378AB3 #5BA7CD #8AC0DB

Accessibility & contrast

On white

3.85

#378AB3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.45

#378AB3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #378AB3

5.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##378AB3	#FFFFFF	#000000	##000000
##378AB3	1.00	3.85	5.45	5.45
#FFFFFF	3.85	1.00	21.00	21.00
#000000	5.45	21.00	1.00	1.00
##000000	5.45	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7689B5

Deuteranopia (green-blind)

#657CB2

Tritanopia (blue-blind)

#009598

Achromatopsia (no color)

#828282

Design tokens & code

CSS

--color: #378ab3;
/* rgb */ color: rgb(55, 138, 179);
/* oklch */ color: oklch(60.1% 0.101 233.6);

Tailwind

colors: {
  custom: {
    50: '#7dacca',
    500: '#378ab3',
    950: '#000000',
  },
}

SCSS

$custom: #378ab3;
$custom-light: #7dacca;
$custom-dark: #000000;

JSON

{
  "hex": "#378ab3",
  "rgb": {
    "r": 55,
    "g": 138,
    "b": 179
  },
  "hsl": {
    "h": 199.839,
    "s": 52.991,
    "l": 45.882
  },
  "oklch": {
    "l": 0.60078,
    "c": 0.10065,
    "h": 233.6
  },
  "luminance": 0.22244
}

Semantic roles & 50–950 ramp

primary

#378AB3

secondary

#C59781

accent

#7B4BDC

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #378AB3

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

Preview Lab → · Contrast checker → · Palette generator →