#3791BB#3791BB

#3791BB is a light, moderate cyan. Relative luminance 0.247; OKLCH L 62.1% C 0.105 H 232.4°. Best body text is #000000 at 5.93:1 contrast (WCAG AA passes).

Color values

HEX	#3791BB
RGB	rgb(55, 145, 187)
HSL	hsl(199, 55%, 47%)
HSV	hsv(199, 71%, 73%)
CMYK	cmyk(70.6%, 22.5%, 0%, 26.7%)
CIE-LAB	lab(56.73, -12.83, -29.59)
CIE-LCH	lch(56.73, 32.25, 246.55°)
OKLab	oklab(62.14% -0.0641 -0.0831)
OKLCH	oklch(62.14% 0.105 232.4)
XYZ	xyz(20.6670, 24.6486, 50.6725)
Luminance	0.2465 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3791BB #BB6137

analogous

#37BBA3 #3791BB #374FBB

triadic

#3791BB #BB3791 #91BB37

tetradic

#3791BB #A337BB #BB6137 #4FBB37

square

#3791BB #A337BB #BB6137 #4FBB37

split-complementary

#3791BB #BB374F #BBA337

monochromatic

#1B485C #296C8C #3791BB #5FACD0 #8EC5DE

Accessibility & contrast

On white

3.54

#3791BB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.93

#3791BB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3791BB

5.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3791BB	#FFFFFF	#000000	##000000
##3791BB	1.00	3.54	5.93	5.93
#FFFFFF	3.54	1.00	21.00	21.00
#000000	5.93	21.00	1.00	1.00
##000000	5.93	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7C8FBD

Deuteranopia (green-blind)

#6A82BA

Tritanopia (blue-blind)

#009C9F

Achromatopsia (no color)

#888888

Design tokens & code

CSS

--color: #3791bb;
/* rgb */ color: rgb(55, 145, 187);
/* oklch */ color: oklch(62.1% 0.105 232.4);

Tailwind

colors: {
  custom: {
    50: '#7eb1cf',
    500: '#3791bb',
    950: '#000000',
  },
}

SCSS

$custom: #3791bb;
$custom-light: #7eb1cf;
$custom-dark: #000000;

JSON

{
  "hex": "#3791bb",
  "rgb": {
    "r": 55,
    "g": 145,
    "b": 187
  },
  "hsl": {
    "h": 199.091,
    "s": 54.545,
    "l": 47.451
  },
  "oklch": {
    "l": 0.6214,
    "c": 0.10494,
    "h": 232.4
  },
  "luminance": 0.24651
}

Semantic roles & 50–950 ramp

primary

#3791BB

secondary

#C99B85

accent

#794ADE

background

#F8FAFC

surface

#EFF5F9

border

#CACFD2

text

#0B1014

muted

#7C7F82

Preview Lab

Preview with #3791BB

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

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