#378CBB#378CBB

#378CBB is a mid, moderate cyan. Relative luminance 0.232; OKLCH L 60.9% C 0.108 H 236.7°. Best body text is #000000 at 5.63:1 contrast (WCAG AA passes).

Color values

HEX	#378CBB
RGB	rgb(55, 140, 187)
HSL	hsl(201, 55%, 47%)
HSV	hsv(201, 71%, 73%)
CMYK	cmyk(70.6%, 25.1%, 0%, 26.7%)
CIE-LAB	lab(55.23, -10.03, -31.92)
CIE-LCH	lch(55.23, 33.46, 252.56°)
OKLab	oklab(60.95% -0.059 -0.0899)
OKLCH	oklch(60.95% 0.108 236.7)
XYZ	xyz(19.9198, 23.1540, 50.4234)
Luminance	0.2316 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#378CBB #BB6637

analogous

#37BBA8 #378CBB #374ABB

triadic

#378CBB #BB378C #8CBB37

tetradic

#378CBB #A837BB #BB6637 #4ABB37

square

#378CBB #A837BB #BB6637 #4ABB37

split-complementary

#378CBB #BB374A #BBA837

monochromatic

#1B455C #29698C #378CBB #5FA8D0 #8EC2DE

Accessibility & contrast

On white

3.73

#378CBB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.63

#378CBB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #378CBB

5.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##378CBB	#FFFFFF	#000000	##000000
##378CBB	1.00	3.73	5.63	5.63
#FFFFFF	3.73	1.00	21.00	21.00
#000000	5.63	21.00	1.00	1.00
##000000	5.63	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#768BBD

Deuteranopia (green-blind)

#647FBA

Tritanopia (blue-blind)

#00989C

Achromatopsia (no color)

#848484

Design tokens & code

CSS

--color: #378cbb;
/* rgb */ color: rgb(55, 140, 187);
/* oklch */ color: oklch(60.9% 0.108 236.7);

Tailwind

colors: {
  custom: {
    50: '#7eadcf',
    500: '#378cbb',
    950: '#000000',
  },
}

SCSS

$custom: #378cbb;
$custom-light: #7eadcf;
$custom-dark: #000000;

JSON

{
  "hex": "#378cbb",
  "rgb": {
    "r": 55,
    "g": 140,
    "b": 187
  },
  "hsl": {
    "h": 201.364,
    "s": 54.545,
    "l": 47.451
  },
  "oklch": {
    "l": 0.60946,
    "c": 0.10752,
    "h": 236.7
  },
  "luminance": 0.23156
}

Semantic roles & 50–950 ramp

primary

#378CBB

secondary

#C99D85

accent

#7F4ADE

background

#F8FAFC

surface

#EFF4F9

border

#CACED2

text

#0B1014

muted

#7C7F82

Preview Lab

Preview with #378CBB

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

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