#378BB2#378BB2

#378BB2 is a mid, moderate cyan. Relative luminance 0.225; OKLCH L 60.3% C 0.099 H 231.9°. Best body text is #000000 at 5.50:1 contrast (WCAG AA passes).

Color values

HEX	#378BB2
RGB	rgb(55, 139, 178)
HSL	hsl(199, 53%, 46%)
HSV	hsv(199, 69%, 70%)
CMYK	cmyk(69.1%, 21.9%, 0%, 30.2%)
CIE-LAB	lab(54.54, -12.53, -27.85)
CIE-LCH	lch(54.54, 30.54, 245.78°)
OKLab	oklab(60.27% -0.0612 -0.0781)
OKLCH	oklch(60.27% 0.099 231.9)
XYZ	xyz(18.8409, 22.4897, 45.4588)
Luminance	0.2249 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#378BB2 #B25E37

analogous

#37B29B #378BB2 #374EB2

triadic

#378BB2 #B2378B #8BB237

tetradic

#378BB2 #9B37B2 #B25E37 #4EB237

square

#378BB2 #9B37B2 #B25E37 #4EB237

split-complementary

#378BB2 #B2374E #B29B37

monochromatic

#1A4254 #296683 #378BB2 #5AA8CC #89C1DB

Accessibility & contrast

On white

3.82

#378BB2 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.50

#378BB2 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #378BB2

5.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##378BB2	#FFFFFF	#000000	##000000
##378BB2	1.00	3.82	5.50	5.50
#FFFFFF	3.82	1.00	21.00	21.00
#000000	5.50	21.00	1.00	1.00
##000000	5.50	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7889B4

Deuteranopia (green-blind)

#677DB1

Tritanopia (blue-blind)

#009698

Achromatopsia (no color)

#828282

Design tokens & code

CSS

--color: #378bb2;
/* rgb */ color: rgb(55, 139, 178);
/* oklch */ color: oklch(60.3% 0.099 231.9);

Tailwind

colors: {
  custom: {
    50: '#7dacc9',
    500: '#378bb2',
    950: '#000000',
  },
}

SCSS

$custom: #378bb2;
$custom-light: #7dacc9;
$custom-dark: #000000;

JSON

{
  "hex": "#378bb2",
  "rgb": {
    "r": 55,
    "g": 139,
    "b": 178
  },
  "hsl": {
    "h": 199.024,
    "s": 52.79,
    "l": 45.686
  },
  "oklch": {
    "l": 0.60271,
    "c": 0.09924,
    "h": 231.9
  },
  "luminance": 0.22492
}

Semantic roles & 50–950 ramp

primary

#378BB2

secondary

#C59680

accent

#794CDC

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #378BB2

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

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