#3991AC#3991AC

#3991AC is a mid, moderate cyan. Relative luminance 0.241; OKLCH L 61.5% C 0.092 H 221.7°. Best body text is #000000 at 5.82:1 contrast (WCAG AA passes).

Color values

HEX	#3991AC
RGB	rgb(57, 145, 172)
HSL	hsl(194, 50%, 45%)
HSV	hsv(194, 67%, 67%)
CMYK	cmyk(66.9%, 15.7%, 0%, 32.5%)
CIE-LAB	lab(56.18, -17.48, -21.89)
CIE-LCH	lch(56.18, 28.01, 231.39°)
OKLab	oklab(61.52% -0.0686 -0.061)
OKLCH	oklch(61.52% 0.092 221.7)
XYZ	xyz(19.2561, 24.0971, 42.6581)
Luminance	0.2410 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3991AC #AC5439

analogous

#39AC8E #3991AC #3958AC

triadic

#3991AC #AC3991 #91AC39

tetradic

#3991AC #8E39AC #AC5439 #58AC39

square

#3991AC #8E39AC #AC5439 #58AC39

split-complementary

#3991AC #AC3958 #AC8E39

monochromatic

#1B4350 #2A6A7E #3991AC #5AAEC8 #88C5D8

Accessibility & contrast

On white

3.61

#3991AC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.82

#3991AC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3991AC

5.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3991AC	#FFFFFF	#000000	##000000
##3991AC	1.00	3.61	5.82	5.82
#FFFFFF	3.61	1.00	21.00	21.00
#000000	5.82	21.00	1.00	1.00
##000000	5.82	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#818DAD

Deuteranopia (green-blind)

#7182AC

Tritanopia (blue-blind)

#009A9A

Achromatopsia (no color)

#878787

Design tokens & code

CSS

--color: #3991ac;
/* rgb */ color: rgb(57, 145, 172);
/* oklch */ color: oklch(61.5% 0.092 221.7);

Tailwind

colors: {
  custom: {
    50: '#7db1c4',
    500: '#3991ac',
    950: '#000000',
  },
}

SCSS

$custom: #3991ac;
$custom-light: #7db1c4;
$custom-dark: #000000;

JSON

{
  "hex": "#3991ac",
  "rgb": {
    "r": 57,
    "g": 145,
    "b": 172
  },
  "hsl": {
    "h": 194.087,
    "s": 50.218,
    "l": 44.902
  },
  "oklch": {
    "l": 0.6152,
    "c": 0.09182,
    "h": 221.7
  },
  "luminance": 0.24099
}

Semantic roles & 50–950 ramp

primary

#3991AC

secondary

#C28F7F

accent

#6F4EDA

background

#F8FAFC

surface

#EFF5F8

border

#CACFD1

text

#0B1012

muted

#7C7F81

Preview Lab

Preview with #3991AC

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

Preview Lab → · Contrast checker → · Palette generator →