#3991BF#3991BF

#3991BF is a light, moderate cyan. Relative luminance 0.249; OKLCH L 62.4% C 0.108 H 235.2°. Best body text is #000000 at 5.98:1 contrast (WCAG AA passes).

Color values

HEX	#3991BF
RGB	rgb(57, 145, 191)
HSL	hsl(201, 54%, 49%)
HSV	hsv(201, 70%, 75%)
CMYK	cmyk(70.2%, 24.1%, 0%, 25.1%)
CIE-LAB	lab(56.96, -11.19, -31.50)
CIE-LCH	lch(56.96, 33.43, 250.45°)
OKLab	oklab(62.39% -0.0615 -0.0886)
OKLCH	oklch(62.39% 0.108 235.2)
XYZ	xyz(21.2130, 24.8799, 52.9644)
Luminance	0.2488 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3991BF #BF6739

analogous

#39BFAA #3991BF #394EBF

triadic

#3991BF #BF3991 #91BF39

tetradic

#3991BF #AA39BF #BF6739 #4EBF39

square

#3991BF #AA39BF #BF6739 #4EBF39

split-complementary

#3991BF #BF394E #BFAA39

monochromatic

#1D4961 #2B6D90 #3991BF #64ACD1 #93C5DF

Accessibility & contrast

On white

3.51

#3991BF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.98

#3991BF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3991BF

5.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3991BF	#FFFFFF	#000000	##000000
##3991BF	1.00	3.51	5.98	5.98
#FFFFFF	3.51	1.00	21.00	21.00
#000000	5.98	21.00	1.00	1.00
##000000	5.98	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7B90C1

Deuteranopia (green-blind)

#6983BE

Tritanopia (blue-blind)

#009DA1

Achromatopsia (no color)

#898989

Design tokens & code

CSS

--color: #3991bf;
/* rgb */ color: rgb(57, 145, 191);
/* oklch */ color: oklch(62.4% 0.108 235.2);

Tailwind

colors: {
  custom: {
    50: '#80b1d2',
    500: '#3991bf',
    950: '#000000',
  },
}

SCSS

$custom: #3991bf;
$custom-light: #80b1d2;
$custom-dark: #000000;

JSON

{
  "hex": "#3991bf",
  "rgb": {
    "r": 57,
    "g": 145,
    "b": 191
  },
  "hsl": {
    "h": 200.597,
    "s": 54.032,
    "l": 48.627
  },
  "oklch": {
    "l": 0.62393,
    "c": 0.10788,
    "h": 235.2
  },
  "luminance": 0.24882
}

Semantic roles & 50–950 ramp

primary

#3991BF

secondary

#CAA08A

accent

#7D4ADD

background

#F8FAFC

surface

#F0F5F9

border

#CBCFD2

text

#0B1014

muted

#7C7F82

Preview Lab

Preview with #3991BF

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

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