#3991BB#3991BB

#3991BB is a light, moderate cyan. Relative luminance 0.247; OKLCH L 62.2% C 0.104 H 232.8°. Best body text is #000000 at 5.94:1 contrast (WCAG AA passes).

Color values

HEX	#3991BB
RGB	rgb(57, 145, 187)
HSL	hsl(199, 53%, 48%)
HSV	hsv(199, 70%, 73%)
CMYK	cmyk(69.5%, 22.5%, 0%, 26.7%)
CIE-LAB	lab(56.79, -12.54, -29.50)
CIE-LCH	lch(56.79, 32.05, 246.98°)
OKLab	oklab(62.2% -0.063 -0.0828)
OKLCH	oklch(62.2% 0.104 232.8)
XYZ	xyz(20.7788, 24.7062, 50.6778)
Luminance	0.2471 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3991BB #BB6339

analogous

#39BBA4 #3991BB #3950BB

triadic

#3991BB #BB3991 #91BB39

tetradic

#3991BB #A439BB #BB6339 #50BB39

square

#3991BB #A439BB #BB6339 #50BB39

split-complementary

#3991BB #BB3950 #BBA439

monochromatic

#1C485D #2B6D8C #3991BB #62ACCF #91C5DD

Accessibility & contrast

On white

3.53

#3991BB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.94

#3991BB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3991BB

5.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3991BB	#FFFFFF	#000000	##000000
##3991BB	1.00	3.53	5.94	5.94
#FFFFFF	3.53	1.00	21.00	21.00
#000000	5.94	21.00	1.00	1.00
##000000	5.94	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7C8FBD

Deuteranopia (green-blind)

#6A83BA

Tritanopia (blue-blind)

#009C9F

Achromatopsia (no color)

#888888

Design tokens & code

CSS

--color: #3991bb;
/* rgb */ color: rgb(57, 145, 187);
/* oklch */ color: oklch(62.2% 0.104 232.8);

Tailwind

colors: {
  custom: {
    50: '#7fb1cf',
    500: '#3991bb',
    950: '#000000',
  },
}

SCSS

$custom: #3991bb;
$custom-light: #7fb1cf;
$custom-dark: #000000;

JSON

{
  "hex": "#3991bb",
  "rgb": {
    "r": 57,
    "g": 145,
    "b": 187
  },
  "hsl": {
    "h": 199.385,
    "s": 53.279,
    "l": 47.843
  },
  "oklch": {
    "l": 0.62201,
    "c": 0.10403,
    "h": 232.8
  },
  "luminance": 0.24709
}

Semantic roles & 50–950 ramp

primary

#3991BB

secondary

#C89C87

accent

#7A4BDD

background

#F8FAFC

surface

#EFF5F9

border

#CACFD2

text

#0B1014

muted

#7C7F82

Preview Lab

Preview with #3991BB

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

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