#378FB3#378FB3

#378FB3 is a mid, moderate cyan. Relative luminance 0.237; OKLCH L 61.3% C 0.099 H 228.8°. Best body text is #000000 at 5.74:1 contrast (WCAG AA passes).

Color values

HEX	#378FB3
RGB	rgb(55, 143, 179)
HSL	hsl(197, 53%, 46%)
HSV	hsv(197, 69%, 70%)
CMYK	cmyk(69.3%, 20.1%, 0%, 29.8%)
CIE-LAB	lab(55.80, -14.41, -26.49)
CIE-LCH	lch(55.80, 30.15, 241.45°)
OKLab	oklab(61.28% -0.0649 -0.0742)
OKLCH	oklch(61.28% 0.099 228.8)
XYZ	xyz(19.5314, 23.7097, 46.1862)
Luminance	0.2371 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#378FB3 #B35B37

analogous

#37B399 #378FB3 #3751B3

triadic

#378FB3 #B3378F #8FB337

tetradic

#378FB3 #9937B3 #B35B37 #51B337

square

#378FB3 #9937B3 #B35B37 #51B337

split-complementary

#378FB3 #B33751 #B39937

monochromatic

#1A4455 #296A84 #378FB3 #5BABCD #8AC3DB

Accessibility & contrast

On white

3.66

#378FB3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.74

#378FB3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #378FB3

5.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##378FB3	#FFFFFF	#000000	##000000
##378FB3	1.00	3.66	5.74	5.74
#FFFFFF	3.66	1.00	21.00	21.00
#000000	5.74	21.00	1.00	1.00
##000000	5.74	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7C8DB5

Deuteranopia (green-blind)

#6B80B3

Tritanopia (blue-blind)

#00999B

Achromatopsia (no color)

#868686

Design tokens & code

CSS

--color: #378fb3;
/* rgb */ color: rgb(55, 143, 179);
/* oklch */ color: oklch(61.3% 0.099 228.8);

Tailwind

colors: {
  custom: {
    50: '#7dafca',
    500: '#378fb3',
    950: '#000000',
  },
}

SCSS

$custom: #378fb3;
$custom-light: #7dafca;
$custom-dark: #000000;

JSON

{
  "hex": "#378fb3",
  "rgb": {
    "r": 55,
    "g": 143,
    "b": 179
  },
  "hsl": {
    "h": 197.419,
    "s": 52.991,
    "l": 45.882
  },
  "oklch": {
    "l": 0.61284,
    "c": 0.0986,
    "h": 228.8
  },
  "luminance": 0.23712
}

Semantic roles & 50–950 ramp

primary

#378FB3

secondary

#C59581

accent

#754BDC

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #378FB3

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

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