#378DBB#378DBB

#378DBB is a mid, moderate cyan. Relative luminance 0.234; OKLCH L 61.2% C 0.107 H 235.9°. Best body text is #000000 at 5.69:1 contrast (WCAG AA passes).

Color values

HEX	#378DBB
RGB	rgb(55, 141, 187)
HSL	hsl(201, 55%, 47%)
HSV	hsv(201, 71%, 73%)
CMYK	cmyk(70.6%, 24.6%, 0%, 26.7%)
CIE-LAB	lab(55.53, -10.60, -31.46)
CIE-LCH	lch(55.53, 33.19, 251.38°)
OKLab	oklab(61.18% -0.06 -0.0885)
OKLCH	oklch(61.18% 0.107 235.9)
XYZ	xyz(20.0665, 23.4476, 50.4724)
Luminance	0.2345 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#378DBB #BB6537

analogous

#37BBA7 #378DBB #374BBB

triadic

#378DBB #BB378D #8DBB37

tetradic

#378DBB #A737BB #BB6537 #4BBB37

square

#378DBB #A737BB #BB6537 #4BBB37

split-complementary

#378DBB #BB374B #BBA737

monochromatic

#1B465C #29698C #378DBB #5FA9D0 #8EC2DE

Accessibility & contrast

On white

3.69

#378DBB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.69

#378DBB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #378DBB

5.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##378DBB	#FFFFFF	#000000	##000000
##378DBB	1.00	3.69	5.69	5.69
#FFFFFF	3.69	1.00	21.00	21.00
#000000	5.69	21.00	1.00	1.00
##000000	5.69	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#778CBD

Deuteranopia (green-blind)

#657FBA

Tritanopia (blue-blind)

#00999D

Achromatopsia (no color)

#858585

Design tokens & code

CSS

--color: #378dbb;
/* rgb */ color: rgb(55, 141, 187);
/* oklch */ color: oklch(61.2% 0.107 235.9);

Tailwind

colors: {
  custom: {
    50: '#7eaecf',
    500: '#378dbb',
    950: '#000000',
  },
}

SCSS

$custom: #378dbb;
$custom-light: #7eaecf;
$custom-dark: #000000;

JSON

{
  "hex": "#378dbb",
  "rgb": {
    "r": 55,
    "g": 141,
    "b": 187
  },
  "hsl": {
    "h": 200.909,
    "s": 54.545,
    "l": 47.451
  },
  "oklch": {
    "l": 0.61184,
    "c": 0.10696,
    "h": 235.9
  },
  "luminance": 0.2345
}

Semantic roles & 50–950 ramp

primary

#378DBB

secondary

#C99D85

accent

#7D4ADE

background

#F8FAFC

surface

#EFF4F9

border

#CACED2

text

#0B1014

muted

#7C7F82

Preview Lab

Preview with #378DBB

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

Preview Lab → · Contrast checker → · Palette generator →