#3F91B8#3F91B8

#3F91B8 is a light, moderate cyan. Relative luminance 0.248; OKLCH L 62.3% C 0.098 H 232.1°. Best body text is #000000 at 5.95:1 contrast (WCAG AA passes).

Color values

HEX	#3F91B8
RGB	rgb(63, 145, 184)
HSL	hsl(199, 49%, 48%)
HSV	hsv(199, 66%, 72%)
CMYK	cmyk(65.8%, 21.2%, 0%, 27.8%)
CIE-LAB	lab(56.85, -12.57, -27.69)
CIE-LCH	lch(56.85, 30.41, 245.58°)
OKLab	oklab(62.26% -0.0605 -0.0776)
OKLCH	oklch(62.26% 0.098 232.1)
XYZ	xyz(20.8236, 24.7661, 49.0210)
Luminance	0.2477 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F91B8 #B8663F

analogous

#3FB8A2 #3F91B8 #3F54B8

triadic

#3F91B8 #B83F91 #91B83F

tetradic

#3F91B8 #A23FB8 #B8663F #54B83F

square

#3F91B8 #A23FB8 #B8663F #54B83F

split-complementary

#3F91B8 #B83F54 #B8A23F

monochromatic

#20495D #2F6D8A #3F91B8 #69ACCC #96C5DB

Accessibility & contrast

On white

3.53

#3F91B8 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.95

#3F91B8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F91B8

5.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F91B8	#FFFFFF	#000000	##000000
##3F91B8	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)

#7E8FBA

Deuteranopia (green-blind)

#6D83B7

Tritanopia (blue-blind)

#009C9E

Achromatopsia (no color)

#888888

Design tokens & code

CSS

--color: #3f91b8;
/* rgb */ color: rgb(63, 145, 184);
/* oklch */ color: oklch(62.3% 0.098 232.1);

Tailwind

colors: {
  custom: {
    50: '#81b1cd',
    500: '#3f91b8',
    950: '#000000',
  },
}

SCSS

$custom: #3f91b8;
$custom-light: #81b1cd;
$custom-dark: #000000;

JSON

{
  "hex": "#3f91b8",
  "rgb": {
    "r": 63,
    "g": 145,
    "b": 184
  },
  "hsl": {
    "h": 199.339,
    "s": 48.988,
    "l": 48.431
  },
  "oklch": {
    "l": 0.62259,
    "c": 0.09836,
    "h": 232.1
  },
  "luminance": 0.24768
}

Semantic roles & 50–950 ramp

primary

#3F91B8

secondary

#C79F8C

accent

#7C4FD9

background

#F8FAFC

surface

#F0F5F9

border

#CBCFD2

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #3F91B8

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

Preview Lab → · Contrast checker → · Palette generator →