#378FB4#378FB4

#378FB4 is a mid, moderate cyan. Relative luminance 0.238; OKLCH L 61.3% C 0.099 H 229.5°. Best body text is #000000 at 5.75:1 contrast (WCAG AA passes).

Color values

HEX	#378FB4
RGB	rgb(55, 143, 180)
HSL	hsl(198, 53%, 46%)
HSV	hsv(198, 69%, 71%)
CMYK	cmyk(69.4%, 20.6%, 0%, 29.4%)
CIE-LAB	lab(55.84, -14.08, -26.99)
CIE-LCH	lch(55.84, 30.44, 242.46°)
OKLab	oklab(61.33% -0.0646 -0.0757)
OKLCH	oklch(61.33% 0.099 229.5)
XYZ	xyz(19.6329, 23.7503, 46.7207)
Luminance	0.2375 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#378FB4 #B45C37

analogous

#37B49A #378FB4 #3750B4

triadic

#378FB4 #B4378F #8FB437

tetradic

#378FB4 #9A37B4 #B45C37 #50B437

square

#378FB4 #9A37B4 #B45C37 #50B437

split-complementary

#378FB4 #B43750 #B49A37

monochromatic

#1A4556 #296A85 #378FB4 #5BABCD #8AC3DB

Accessibility & contrast

On white

3.65

#378FB4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.75

#378FB4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #378FB4

5.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##378FB4	#FFFFFF	#000000	##000000
##378FB4	1.00	3.65	5.75	5.75
#FFFFFF	3.65	1.00	21.00	21.00
#000000	5.75	21.00	1.00	1.00
##000000	5.75	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7C8DB6

Deuteranopia (green-blind)

#6B80B3

Tritanopia (blue-blind)

#00999B

Achromatopsia (no color)

#868686

Design tokens & code

CSS

--color: #378fb4;
/* rgb */ color: rgb(55, 143, 180);
/* oklch */ color: oklch(61.3% 0.099 229.5);

Tailwind

colors: {
  custom: {
    50: '#7dafca',
    500: '#378fb4',
    950: '#000000',
  },
}

SCSS

$custom: #378fb4;
$custom-light: #7dafca;
$custom-dark: #000000;

JSON

{
  "hex": "#378fb4",
  "rgb": {
    "r": 55,
    "g": 143,
    "b": 180
  },
  "hsl": {
    "h": 197.76,
    "s": 53.191,
    "l": 46.078
  },
  "oklch": {
    "l": 0.61331,
    "c": 0.09947,
    "h": 229.5
  },
  "luminance": 0.23752
}

Semantic roles & 50–950 ramp

primary

#378FB4

secondary

#C69581

accent

#764BDD

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #378FB4

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

Preview Lab → · Contrast checker → · Palette generator →