#3F91BF#3F91BF

#3F91BF is a light, moderate cyan. Relative luminance 0.251; OKLCH L 62.6% C 0.105 H 236.5°. Best body text is #000000 at 6.01:1 contrast (WCAG AA passes).

Color values

HEX	#3F91BF
RGB	rgb(63, 145, 191)
HSL	hsl(202, 50%, 50%)
HSV	hsv(202, 67%, 75%)
CMYK	cmyk(67%, 24.1%, 0%, 25.1%)
CIE-LAB	lab(57.14, -10.25, -31.20)
CIE-LCH	lch(57.14, 32.84, 251.81°)
OKLab	oklab(62.59% -0.058 -0.0877)
OKLCH	oklch(62.59% 0.105 236.5)
XYZ	xyz(21.5756, 25.0669, 52.9814)
Luminance	0.2507 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F91BF #BF6D3F

analogous

#3FBFAD #3F91BF #3F51BF

triadic

#3F91BF #BF3F91 #91BF3F

tetradic

#3F91BF #AD3FBF #BF6D3F #51BF3F

square

#3F91BF #AD3FBF #BF6D3F #51BF3F

split-complementary

#3F91BF #BF3F51 #BFAD3F

monochromatic

#214B63 #306E91 #3F91BF #6DABCF #9BC6DE

Accessibility & contrast

On white

3.49

#3F91BF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.01

#3F91BF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F91BF

6.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F91BF	#FFFFFF	#000000	##000000
##3F91BF	1.00	3.49	6.01	6.01
#FFFFFF	3.49	1.00	21.00	21.00
#000000	6.01	21.00	1.00	1.00
##000000	6.01	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7B90C1

Deuteranopia (green-blind)

#6A84BE

Tritanopia (blue-blind)

#009DA1

Achromatopsia (no color)

#898989

Design tokens & code

CSS

--color: #3f91bf;
/* rgb */ color: rgb(63, 145, 191);
/* oklch */ color: oklch(62.6% 0.105 236.5);

Tailwind

colors: {
  custom: {
    50: '#82b1d2',
    500: '#3f91bf',
    950: '#000000',
  },
}

SCSS

$custom: #3f91bf;
$custom-light: #82b1d2;
$custom-dark: #000000;

JSON

{
  "hex": "#3f91bf",
  "rgb": {
    "r": 63,
    "g": 145,
    "b": 191
  },
  "hsl": {
    "h": 201.563,
    "s": 50.394,
    "l": 49.804
  },
  "oklch": {
    "l": 0.62589,
    "c": 0.10513,
    "h": 236.5
  },
  "luminance": 0.25069
}

Semantic roles & 50–950 ramp

primary

#3F91BF

secondary

#CAA590

accent

#804EDA

background

#F8FAFC

surface

#F0F5F9

border

#CBCFD2

text

#0C1014

muted

#7D7F82

Preview Lab

Preview with #3F91BF

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

Preview Lab → · Contrast checker → · Palette generator →