#378FB5#378FB5

#378FB5 is a mid, moderate cyan. Relative luminance 0.238; OKLCH L 61.4% C 0.100 H 230.2°. Best body text is #000000 at 5.76:1 contrast (WCAG AA passes).

Color values

HEX	#378FB5
RGB	rgb(55, 143, 181)
HSL	hsl(198, 53%, 46%)
HSV	hsv(198, 70%, 71%)
CMYK	cmyk(69.6%, 21%, 0%, 29%)
CIE-LAB	lab(55.88, -13.74, -27.50)
CIE-LCH	lch(55.88, 30.74, 243.45°)
OKLab	oklab(61.38% -0.0642 -0.0771)
OKLCH	oklch(61.38% 0.1 230.2)
XYZ	xyz(19.7352, 23.7912, 47.2592)
Luminance	0.2379 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#378FB5 #B55D37

analogous

#37B59C #378FB5 #3750B5

triadic

#378FB5 #B5378F #8FB537

tetradic

#378FB5 #9C37B5 #B55D37 #50B537

square

#378FB5 #9C37B5 #B55D37 #50B537

split-complementary

#378FB5 #B53750 #B59C37

monochromatic

#1A4557 #296A86 #378FB5 #5CABCD #8BC3DC

Accessibility & contrast

On white

3.65

#378FB5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.76

#378FB5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #378FB5

5.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##378FB5	#FFFFFF	#000000	##000000
##378FB5	1.00	3.65	5.76	5.76
#FFFFFF	3.65	1.00	21.00	21.00
#000000	5.76	21.00	1.00	1.00
##000000	5.76	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7C8DB7

Deuteranopia (green-blind)

#6A80B4

Tritanopia (blue-blind)

#009A9C

Achromatopsia (no color)

#868686

Design tokens & code

CSS

--color: #378fb5;
/* rgb */ color: rgb(55, 143, 181);
/* oklch */ color: oklch(61.4% 0.100 230.2);

Tailwind

colors: {
  custom: {
    50: '#7dafcb',
    500: '#378fb5',
    950: '#000000',
  },
}

SCSS

$custom: #378fb5;
$custom-light: #7dafcb;
$custom-dark: #000000;

JSON

{
  "hex": "#378fb5",
  "rgb": {
    "r": 55,
    "g": 143,
    "b": 181
  },
  "hsl": {
    "h": 198.095,
    "s": 53.39,
    "l": 46.275
  },
  "oklch": {
    "l": 0.61377,
    "c": 0.10034,
    "h": 230.2
  },
  "luminance": 0.23793
}

Semantic roles & 50–950 ramp

primary

#378FB5

secondary

#C69682

accent

#774BDD

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #378FB5

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

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