#378BBF#378BBF

#378BBF is a mid, moderate cyan. Relative luminance 0.230; OKLCH L 60.9% C 0.112 H 239.7°. Best body text is #000000 at 5.61:1 contrast (WCAG AA passes).

Color values

HEX	#378BBF
RGB	rgb(55, 139, 191)
HSL	hsl(203, 55%, 48%)
HSV	hsv(203, 71%, 75%)
CMYK	cmyk(71.2%, 27.2%, 0%, 25.1%)
CIE-LAB	lab(55.11, -8.08, -34.39)
CIE-LCH	lch(55.11, 35.32, 256.77°)
OKLab	oklab(60.91% -0.0567 -0.097)
OKLCH	oklch(60.91% 0.112 239.7)
XYZ	xyz(20.2085, 23.0368, 52.6616)
Luminance	0.2304 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#378BBF #BF6B37

analogous

#37BFAF #378BBF #3747BF

triadic

#378BBF #BF378B #8BBF37

tetradic

#378BBF #AF37BF #BF6B37 #47BF37

square

#378BBF #AF37BF #BF6B37 #47BF37

split-complementary

#378BBF #BF3747 #BFAF37

monochromatic

#1C4660 #29688F #378BBF #62A7D2 #91C1DF

Accessibility & contrast

On white

3.74

#378BBF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.61

#378BBF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #378BBF

5.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##378BBF	#FFFFFF	#000000	##000000
##378BBF	1.00	3.74	5.61	5.61
#FFFFFF	3.74	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)

#738BC1

Deuteranopia (green-blind)

#607EBE

Tritanopia (blue-blind)

#00989D

Achromatopsia (no color)

#848484

Design tokens & code

CSS

--color: #378bbf;
/* rgb */ color: rgb(55, 139, 191);
/* oklch */ color: oklch(60.9% 0.112 239.7);

Tailwind

colors: {
  custom: {
    50: '#7facd2',
    500: '#378bbf',
    950: '#000000',
  },
}

SCSS

$custom: #378bbf;
$custom-light: #7facd2;
$custom-dark: #000000;

JSON

{
  "hex": "#378bbf",
  "rgb": {
    "r": 55,
    "g": 139,
    "b": 191
  },
  "hsl": {
    "h": 202.941,
    "s": 55.285,
    "l": 48.235
  },
  "oklch": {
    "l": 0.60909,
    "c": 0.11235,
    "h": 239.7
  },
  "luminance": 0.23039
}

Semantic roles & 50–950 ramp

primary

#378BBF

secondary

#CAA188

accent

#8249DF

background

#F8FAFC

surface

#EFF4F9

border

#CACED2

text

#0B1014

muted

#7C7F82

Preview Lab

Preview with #378BBF

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

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