#378DB1#378DB1

#378DB1 is a mid, moderate cyan. Relative luminance 0.230; OKLCH L 60.7% C 0.098 H 229.3°. Best body text is #000000 at 5.61:1 contrast (WCAG AA passes).

Color values

HEX	#378DB1
RGB	rgb(55, 141, 177)
HSL	hsl(198, 53%, 45%)
HSV	hsv(198, 69%, 69%)
CMYK	cmyk(68.9%, 20.3%, 0%, 30.6%)
CIE-LAB	lab(55.11, -13.97, -26.41)
CIE-LCH	lch(55.11, 29.88, 242.11°)
OKLab	oklab(60.71% -0.0636 -0.074)
OKLCH	oklch(60.71% 0.098 229.3)
XYZ	xyz(19.0331, 23.0342, 45.0294)
Luminance	0.2304 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#378DB1 #B15B37

analogous

#37B198 #378DB1 #3750B1

triadic

#378DB1 #B1378D #8DB137

tetradic

#378DB1 #9837B1 #B15B37 #50B137

square

#378DB1 #9837B1 #B15B37 #50B137

split-complementary

#378DB1 #B13750 #B19837

monochromatic

#1A4354 #286882 #378DB1 #5AAACC #88C2DA

Accessibility & contrast

On white

3.75

#378DB1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.61

#378DB1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #378DB1

5.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##378DB1	#FFFFFF	#000000	##000000
##378DB1	1.00	3.75	5.61	5.61
#FFFFFF	3.75	1.00	21.00	21.00
#000000	5.61	21.00	1.00	1.00
##000000	5.61	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7A8BB3

Deuteranopia (green-blind)

#6A7FB1

Tritanopia (blue-blind)

#009799

Achromatopsia (no color)

#848484

Design tokens & code

CSS

--color: #378db1;
/* rgb */ color: rgb(55, 141, 177);
/* oklch */ color: oklch(60.7% 0.098 229.3);

Tailwind

colors: {
  custom: {
    50: '#7daec8',
    500: '#378db1',
    950: '#000000',
  },
}

SCSS

$custom: #378db1;
$custom-light: #7daec8;
$custom-dark: #000000;

JSON

{
  "hex": "#378db1",
  "rgb": {
    "r": 55,
    "g": 141,
    "b": 177
  },
  "hsl": {
    "h": 197.705,
    "s": 52.586,
    "l": 45.49
  },
  "oklch": {
    "l": 0.60708,
    "c": 0.09757,
    "h": 229.3
  },
  "luminance": 0.23036
}

Semantic roles & 50–950 ramp

primary

#378DB1

secondary

#C49480

accent

#764CDC

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #378DB1

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

Preview Lab → · Contrast checker → · Palette generator →