#378BB1#378BB1

#378BB1 is a mid, moderate cyan. Relative luminance 0.225; OKLCH L 60.2% C 0.098 H 231.3°. Best body text is #000000 at 5.49:1 contrast (WCAG AA passes).

Color values

HEX	#378BB1
RGB	rgb(55, 139, 177)
HSL	hsl(199, 53%, 45%)
HSV	hsv(199, 69%, 69%)
CMYK	cmyk(68.9%, 21.5%, 0%, 30.6%)
CIE-LAB	lab(54.50, -12.87, -27.35)
CIE-LCH	lch(54.50, 30.22, 244.81°)
OKLab	oklab(60.22% -0.0615 -0.0767)
OKLCH	oklch(60.22% 0.098 231.3)
XYZ	xyz(18.7408, 22.4497, 44.9320)
Luminance	0.2245 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#378BB1 #B15D37

analogous

#37B19A #378BB1 #374EB1

triadic

#378BB1 #B1378B #8BB137

tetradic

#378BB1 #9A37B1 #B15D37 #4EB137

square

#378BB1 #9A37B1 #B15D37 #4EB137

split-complementary

#378BB1 #B1374E #B19A37

monochromatic

#1A4254 #286682 #378BB1 #5AA8CC #88C1DA

Accessibility & contrast

On white

3.82

#378BB1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.49

#378BB1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #378BB1

5.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##378BB1	#FFFFFF	#000000	##000000
##378BB1	1.00	3.82	5.49	5.49
#FFFFFF	3.82	1.00	21.00	21.00
#000000	5.49	21.00	1.00	1.00
##000000	5.49	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7889B3

Deuteranopia (green-blind)

#677DB0

Tritanopia (blue-blind)

#009598

Achromatopsia (no color)

#828282

Design tokens & code

CSS

--color: #378bb1;
/* rgb */ color: rgb(55, 139, 177);
/* oklch */ color: oklch(60.2% 0.098 231.3);

Tailwind

colors: {
  custom: {
    50: '#7cacc8',
    500: '#378bb1',
    950: '#000000',
  },
}

SCSS

$custom: #378bb1;
$custom-light: #7cacc8;
$custom-dark: #000000;

JSON

{
  "hex": "#378bb1",
  "rgb": {
    "r": 55,
    "g": 139,
    "b": 177
  },
  "hsl": {
    "h": 198.689,
    "s": 52.586,
    "l": 45.49
  },
  "oklch": {
    "l": 0.60224,
    "c": 0.09833,
    "h": 231.3
  },
  "luminance": 0.22452
}

Semantic roles & 50–950 ramp

primary

#378BB1

secondary

#C49580

accent

#794CDC

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #378BB1

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

Preview Lab → · Contrast checker → · Palette generator →