#378CB2#378CB2

#378CB2 is a mid, moderate cyan. Relative luminance 0.228; OKLCH L 60.5% C 0.099 H 231.0°. Best body text is #000000 at 5.56:1 contrast (WCAG AA passes).

Color values

HEX	#378CB2
RGB	rgb(55, 140, 178)
HSL	hsl(199, 53%, 46%)
HSV	hsv(199, 69%, 70%)
CMYK	cmyk(69.1%, 21.3%, 0%, 30.2%)
CIE-LAB	lab(54.85, -13.09, -27.39)
CIE-LCH	lch(54.85, 30.35, 244.46°)
OKLab	oklab(60.51% -0.0622 -0.0768)
OKLCH	oklch(60.51% 0.099 231)
XYZ	xyz(18.9863, 22.7807, 45.5073)
Luminance	0.2278 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#378CB2 #B25D37

analogous

#37B29B #378CB2 #374EB2

triadic

#378CB2 #B2378C #8CB237

tetradic

#378CB2 #9B37B2 #B25D37 #4EB237

square

#378CB2 #9B37B2 #B25D37 #4EB237

split-complementary

#378CB2 #B2374E #B29B37

monochromatic

#1A4254 #296783 #378CB2 #5AA9CC #89C1DB

Accessibility & contrast

On white

3.78

#378CB2 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.56

#378CB2 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #378CB2

5.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##378CB2	#FFFFFF	#000000	##000000
##378CB2	1.00	3.78	5.56	5.56
#FFFFFF	3.78	1.00	21.00	21.00
#000000	5.56	21.00	1.00	1.00
##000000	5.56	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#798AB4

Deuteranopia (green-blind)

#687EB1

Tritanopia (blue-blind)

#009699

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #378cb2;
/* rgb */ color: rgb(55, 140, 178);
/* oklch */ color: oklch(60.5% 0.099 231.0);

Tailwind

colors: {
  custom: {
    50: '#7dadc9',
    500: '#378cb2',
    950: '#000000',
  },
}

SCSS

$custom: #378cb2;
$custom-light: #7dadc9;
$custom-dark: #000000;

JSON

{
  "hex": "#378cb2",
  "rgb": {
    "r": 55,
    "g": 140,
    "b": 178
  },
  "hsl": {
    "h": 198.537,
    "s": 52.79,
    "l": 45.686
  },
  "oklch": {
    "l": 0.60512,
    "c": 0.09883,
    "h": 231
  },
  "luminance": 0.22783
}

Semantic roles & 50–950 ramp

primary

#378CB2

secondary

#C59580

accent

#784CDC

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #378CB2

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

Preview Lab → · Contrast checker → · Palette generator →