#3991BC#3991BC

#3991BC is a light, moderate cyan. Relative luminance 0.248; OKLCH L 62.2% C 0.105 H 233.4°. Best body text is #000000 at 5.95:1 contrast (WCAG AA passes).

Color values

HEX	#3991BC
RGB	rgb(57, 145, 188)
HSL	hsl(200, 53%, 48%)
HSV	hsv(200, 70%, 74%)
CMYK	cmyk(69.7%, 22.9%, 0%, 26.3%)
CIE-LAB	lab(56.83, -12.20, -30.00)
CIE-LCH	lch(56.83, 32.38, 247.87°)
OKLab	oklab(62.25% -0.0626 -0.0843)
OKLCH	oklch(62.25% 0.105 233.4)
XYZ	xyz(20.8863, 24.7492, 51.2435)
Luminance	0.2475 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3991BC #BC6439

analogous

#39BCA5 #3991BC #394FBC

triadic

#3991BC #BC3991 #91BC39

tetradic

#3991BC #A539BC #BC6439 #4FBC39

square

#3991BC #A539BC #BC6439 #4FBC39

split-complementary

#3991BC #BC394F #BCA539

monochromatic

#1D495E #2B6D8D #3991BC #63ACD0 #92C5DE

Accessibility & contrast

On white

3.53

#3991BC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.95

#3991BC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3991BC

5.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3991BC	#FFFFFF	#000000	##000000
##3991BC	1.00	3.53	5.95	5.95
#FFFFFF	3.53	1.00	21.00	21.00
#000000	5.95	21.00	1.00	1.00
##000000	5.95	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7C90BE

Deuteranopia (green-blind)

#6A83BB

Tritanopia (blue-blind)

#009C9F

Achromatopsia (no color)

#888888

Design tokens & code

CSS

--color: #3991bc;
/* rgb */ color: rgb(57, 145, 188);
/* oklch */ color: oklch(62.2% 0.105 233.4);

Tailwind

colors: {
  custom: {
    50: '#7fb1d0',
    500: '#3991bc',
    950: '#000000',
  },
}

SCSS

$custom: #3991bc;
$custom-light: #7fb1d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3991bc",
  "rgb": {
    "r": 57,
    "g": 145,
    "b": 188
  },
  "hsl": {
    "h": 199.695,
    "s": 53.469,
    "l": 48.039
  },
  "oklch": {
    "l": 0.62249,
    "c": 0.10498,
    "h": 233.4
  },
  "luminance": 0.24751
}

Semantic roles & 50–950 ramp

primary

#3991BC

secondary

#C99D88

accent

#7B4BDD

background

#F8FAFC

surface

#EFF5F9

border

#CACFD2

text

#0B1014

muted

#7C7F82

Preview Lab

Preview with #3991BC

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

Preview Lab → · Contrast checker → · Palette generator →