#378BB9#378BB9

#378BB9 is a mid, moderate cyan. Relative luminance 0.228; OKLCH L 60.6% C 0.106 H 236.4°. Best body text is #000000 at 5.56:1 contrast (WCAG AA passes).

Color values

HEX	#378BB9
RGB	rgb(55, 139, 185)
HSL	hsl(201, 54%, 47%)
HSV	hsv(201, 70%, 73%)
CMYK	cmyk(70.3%, 24.9%, 0%, 27.5%)
CIE-LAB	lab(54.84, -10.15, -31.39)
CIE-LCH	lch(54.84, 32.99, 252.08°)
OKLab	oklab(60.61% -0.0587 -0.0883)
OKLCH	oklch(60.61% 0.106 236.4)
XYZ	xyz(19.5617, 22.7781, 49.2552)
Luminance	0.2278 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#378BB9 #B96537

analogous

#37B9A6 #378BB9 #374AB9

triadic

#378BB9 #B9378B #8BB937

tetradic

#378BB9 #A637B9 #B96537 #4AB937

square

#378BB9 #A637B9 #B96537 #4AB937

split-complementary

#378BB9 #B9374A #B9A637

monochromatic

#1B445B #29688A #378BB9 #5EA7CF #8DC1DD

Accessibility & contrast

On white

3.78

#378BB9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.56

#378BB9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #378BB9

5.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##378BB9	#FFFFFF	#000000	##000000
##378BB9	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)

#758ABB

Deuteranopia (green-blind)

#637EB8

Tritanopia (blue-blind)

#00979B

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #378bb9;
/* rgb */ color: rgb(55, 139, 185);
/* oklch */ color: oklch(60.6% 0.106 236.4);

Tailwind

colors: {
  custom: {
    50: '#7eacce',
    500: '#378bb9',
    950: '#000000',
  },
}

SCSS

$custom: #378bb9;
$custom-light: #7eacce;
$custom-dark: #000000;

JSON

{
  "hex": "#378bb9",
  "rgb": {
    "r": 55,
    "g": 139,
    "b": 185
  },
  "hsl": {
    "h": 201.231,
    "s": 54.167,
    "l": 47.059
  },
  "oklch": {
    "l": 0.60609,
    "c": 0.10606,
    "h": 236.4
  },
  "luminance": 0.2278
}

Semantic roles & 50–950 ramp

primary

#378BB9

secondary

#C89C84

accent

#7E4ADE

background

#F8FAFC

surface

#EFF4F9

border

#CACED2

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #378BB9

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

Preview Lab → · Contrast checker → · Palette generator →