#378BB3#378BB3

#378BB3 is a mid, moderate cyan. Relative luminance 0.225; OKLCH L 60.3% C 0.100 H 232.6°. Best body text is #000000 at 5.51:1 contrast (WCAG AA passes).

Color values

HEX	#378BB3
RGB	rgb(55, 139, 179)
HSL	hsl(199, 53%, 46%)
HSV	hsv(199, 69%, 70%)
CMYK	cmyk(69.3%, 22.3%, 0%, 29.8%)
CIE-LAB	lab(54.59, -12.19, -28.36)
CIE-LCH	lch(54.59, 30.87, 246.74°)
OKLab	oklab(60.32% -0.0608 -0.0796)
OKLCH	oklch(60.32% 0.1 232.6)
XYZ	xyz(18.9416, 22.5301, 45.9896)
Luminance	0.2253 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#378BB3 #B35F37

analogous

#37B39D #378BB3 #374DB3

triadic

#378BB3 #B3378B #8BB337

tetradic

#378BB3 #9D37B3 #B35F37 #4DB337

square

#378BB3 #9D37B3 #B35F37 #4DB337

split-complementary

#378BB3 #B3374D #B39D37

monochromatic

#1A4255 #296784 #378BB3 #5BA8CD #8AC1DB

Accessibility & contrast

On white

3.81

#378BB3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.51

#378BB3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #378BB3

5.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##378BB3	#FFFFFF	#000000	##000000
##378BB3	1.00	3.81	5.51	5.51
#FFFFFF	3.81	1.00	21.00	21.00
#000000	5.51	21.00	1.00	1.00
##000000	5.51	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7789B5

Deuteranopia (green-blind)

#667DB2

Tritanopia (blue-blind)

#009698

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #378bb3;
/* rgb */ color: rgb(55, 139, 179);
/* oklch */ color: oklch(60.3% 0.100 232.6);

Tailwind

colors: {
  custom: {
    50: '#7dacca',
    500: '#378bb3',
    950: '#000000',
  },
}

SCSS

$custom: #378bb3;
$custom-light: #7dacca;
$custom-dark: #000000;

JSON

{
  "hex": "#378bb3",
  "rgb": {
    "r": 55,
    "g": 139,
    "b": 179
  },
  "hsl": {
    "h": 199.355,
    "s": 52.991,
    "l": 45.882
  },
  "oklch": {
    "l": 0.60318,
    "c": 0.10018,
    "h": 232.6
  },
  "luminance": 0.22532
}

Semantic roles & 50–950 ramp

primary

#378BB3

secondary

#C59781

accent

#7A4BDC

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #378BB3

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

Preview Lab → · Contrast checker → · Palette generator →