#3F91B7#3F91B7

#3F91B7 is a light, moderate cyan. Relative luminance 0.247; OKLCH L 62.2% C 0.097 H 231.4°. Best body text is #000000 at 5.95:1 contrast (WCAG AA passes).

Color values

HEX	#3F91B7
RGB	rgb(63, 145, 183)
HSL	hsl(199, 49%, 48%)
HSV	hsv(199, 66%, 72%)
CMYK	cmyk(65.6%, 20.8%, 0%, 28.2%)
CIE-LAB	lab(56.81, -12.90, -27.18)
CIE-LCH	lch(56.81, 30.09, 244.61°)
OKLab	oklab(62.21% -0.0608 -0.0761)
OKLCH	oklch(62.21% 0.097 231.4)
XYZ	xyz(20.7192, 24.7243, 48.4709)
Luminance	0.2473 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F91B7 #B7653F

analogous

#3FB7A1 #3F91B7 #3F55B7

triadic

#3F91B7 #B73F91 #91B73F

tetradic

#3F91B7 #A13FB7 #B7653F #55B73F

square

#3F91B7 #A13FB7 #B7653F #55B73F

split-complementary

#3F91B7 #B73F55 #B7A13F

monochromatic

#20495C #2F6D89 #3F91B7 #68ACCB #96C5DB

Accessibility & contrast

On white

3.53

#3F91B7 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.95

#3F91B7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F91B7

5.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F91B7	#FFFFFF	#000000	##000000
##3F91B7	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)

#7E8FB9

Deuteranopia (green-blind)

#6D83B6

Tritanopia (blue-blind)

#009B9E

Achromatopsia (no color)

#888888

Design tokens & code

CSS

--color: #3f91b7;
/* rgb */ color: rgb(63, 145, 183);
/* oklch */ color: oklch(62.2% 0.097 231.4);

Tailwind

colors: {
  custom: {
    50: '#81b1cc',
    500: '#3f91b7',
    950: '#000000',
  },
}

SCSS

$custom: #3f91b7;
$custom-light: #81b1cc;
$custom-dark: #000000;

JSON

{
  "hex": "#3f91b7",
  "rgb": {
    "r": 63,
    "g": 145,
    "b": 183
  },
  "hsl": {
    "h": 199,
    "s": 48.78,
    "l": 48.235
  },
  "oklch": {
    "l": 0.62213,
    "c": 0.09745,
    "h": 231.4
  },
  "luminance": 0.24726
}

Semantic roles & 50–950 ramp

primary

#3F91B7

secondary

#C69E8B

accent

#7B4FD8

background

#F8FAFC

surface

#F0F5F9

border

#CBCFD2

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #3F91B7

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

Preview Lab → · Contrast checker → · Palette generator →