#378AAC#378AAC

#378AAC is a mid, moderate cyan. Relative luminance 0.220; OKLCH L 59.7% C 0.094 H 228.6°. Best body text is #000000 at 5.39:1 contrast (WCAG AA passes).

Color values

HEX	#378AAC
RGB	rgb(55, 138, 172)
HSL	hsl(197, 52%, 45%)
HSV	hsv(197, 68%, 67%)
CMYK	cmyk(68%, 19.8%, 0%, 32.5%)
CIE-LAB	lab(53.99, -13.98, -25.27)
CIE-LCH	lch(53.99, 28.88, 241.04°)
OKLab	oklab(59.75% -0.0623 -0.0707)
OKLCH	oklch(59.75% 0.094 228.6)
XYZ	xyz(18.1075, 21.9658, 42.3072)
Luminance	0.2197 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#378AAC #AC5937

analogous

#37AC94 #378AAC #3750AC

triadic

#378AAC #AC378A #8AAC37

tetradic

#378AAC #9437AC #AC5937 #50AC37

square

#378AAC #9437AC #AC5937 #50AC37

split-complementary

#378AAC #AC3750 #AC9437

monochromatic

#19404F #28657E #378AAC #57A8C9 #85C0D8

Accessibility & contrast

On white

3.89

#378AAC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.39

#378AAC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #378AAC

5.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##378AAC	#FFFFFF	#000000	##000000
##378AAC	1.00	3.89	5.39	5.39
#FFFFFF	3.89	1.00	21.00	21.00
#000000	5.39	21.00	1.00	1.00
##000000	5.39	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7888AE

Deuteranopia (green-blind)

#687CAC

Tritanopia (blue-blind)

#009495

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #378aac;
/* rgb */ color: rgb(55, 138, 172);
/* oklch */ color: oklch(59.7% 0.094 228.6);

Tailwind

colors: {
  custom: {
    50: '#7cacc4',
    500: '#378aac',
    950: '#000000',
  },
}

SCSS

$custom: #378aac;
$custom-light: #7cacc4;
$custom-dark: #000000;

JSON

{
  "hex": "#378aac",
  "rgb": {
    "r": 55,
    "g": 138,
    "b": 172
  },
  "hsl": {
    "h": 197.436,
    "s": 51.542,
    "l": 44.51
  },
  "oklch": {
    "l": 0.59748,
    "c": 0.0943,
    "h": 228.6
  },
  "luminance": 0.21968
}

Semantic roles & 50–950 ramp

primary

#378AAC

secondary

#C2917D

accent

#764DDB

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0B1012

muted

#7C7F81

Preview Lab

Preview with #378AAC

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

Preview Lab → · Contrast checker → · Palette generator →