#3F91BB#3F91BB

#3F91BB is a light, moderate cyan. Relative luminance 0.249; OKLCH L 62.4% C 0.101 H 234.0°. Best body text is #000000 at 5.98:1 contrast (WCAG AA passes).

Color values

HEX	#3F91BB
RGB	rgb(63, 145, 187)
HSL	hsl(200, 50%, 49%)
HSV	hsv(200, 66%, 73%)
CMYK	cmyk(66.3%, 22.5%, 0%, 26.7%)
CIE-LAB	lab(56.97, -11.58, -29.20)
CIE-LCH	lch(56.97, 31.41, 248.36°)
OKLab	oklab(62.4% -0.0594 -0.0819)
OKLCH	oklch(62.4% 0.101 234)
XYZ	xyz(21.1414, 24.8932, 50.6948)
Luminance	0.2490 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F91BB #BB693F

analogous

#3FBBA7 #3F91BB #3F53BB

triadic

#3F91BB #BB3F91 #91BB3F

tetradic

#3F91BB #A73FBB #BB693F #53BB3F

square

#3F91BB #A73FBB #BB693F #53BB3F

split-complementary

#3F91BB #BB3F53 #BBA73F

monochromatic

#204A5F #306E8D #3F91BB #6AACCD #98C5DC

Accessibility & contrast

On white

3.51

#3F91BB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.98

#3F91BB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F91BB

5.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F91BB	#FFFFFF	#000000	##000000
##3F91BB	1.00	3.51	5.98	5.98
#FFFFFF	3.51	1.00	21.00	21.00
#000000	5.98	21.00	1.00	1.00
##000000	5.98	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7D90BD

Deuteranopia (green-blind)

#6C83BA

Tritanopia (blue-blind)

#009C9F

Achromatopsia (no color)

#898989

Design tokens & code

CSS

--color: #3f91bb;
/* rgb */ color: rgb(63, 145, 187);
/* oklch */ color: oklch(62.4% 0.101 234.0);

Tailwind

colors: {
  custom: {
    50: '#81b1cf',
    500: '#3f91bb',
    950: '#000000',
  },
}

SCSS

$custom: #3f91bb;
$custom-light: #81b1cf;
$custom-dark: #000000;

JSON

{
  "hex": "#3f91bb",
  "rgb": {
    "r": 63,
    "g": 145,
    "b": 187
  },
  "hsl": {
    "h": 200.323,
    "s": 49.6,
    "l": 49.02
  },
  "oklch": {
    "l": 0.62399,
    "c": 0.10119,
    "h": 234
  },
  "luminance": 0.24895
}

Semantic roles & 50–950 ramp

primary

#3F91BB

secondary

#C8A18E

accent

#7E4FD9

background

#F8FAFC

surface

#F0F5F9

border

#CBCFD2

text

#0B1014

muted

#7C7F82

Preview Lab

Preview with #3F91BB

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

Preview Lab → · Contrast checker → · Palette generator →