#3F91B5#3F91B5

#3F91B5 is a light, moderate cyan. Relative luminance 0.246; OKLCH L 62.1% C 0.096 H 229.9°. Best body text is #000000 at 5.93:1 contrast (WCAG AA passes).

Color values

HEX	#3F91B5
RGB	rgb(63, 145, 181)
HSL	hsl(198, 48%, 48%)
HSV	hsv(198, 65%, 71%)
CMYK	cmyk(65.2%, 19.9%, 0%, 29%)
CIE-LAB	lab(56.72, -13.55, -26.17)
CIE-LCH	lch(56.72, 29.47, 242.62°)
OKLab	oklab(62.12% -0.0616 -0.0732)
OKLCH	oklch(62.12% 0.096 229.9)
XYZ	xyz(20.5125, 24.6416, 47.3824)
Luminance	0.2464 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F91B5 #B5633F

analogous

#3FB59E #3F91B5 #3F56B5

triadic

#3F91B5 #B53F91 #91B53F

tetradic

#3F91B5 #9E3FB5 #B5633F #56B53F

square

#3F91B5 #9E3FB5 #B5633F #56B53F

split-complementary

#3F91B5 #B53F56 #B59E3F

monochromatic

#1F485A #2F6D88 #3F91B5 #67ACCA #94C5DA

Accessibility & contrast

On white

3.54

#3F91B5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.93

#3F91B5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F91B5

5.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F91B5	#FFFFFF	#000000	##000000
##3F91B5	1.00	3.54	5.93	5.93
#FFFFFF	3.54	1.00	21.00	21.00
#000000	5.93	21.00	1.00	1.00
##000000	5.93	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7F8FB7

Deuteranopia (green-blind)

#6E83B5

Tritanopia (blue-blind)

#009B9D

Achromatopsia (no color)

#888888

Design tokens & code

CSS

--color: #3f91b5;
/* rgb */ color: rgb(63, 145, 181);
/* oklch */ color: oklch(62.1% 0.096 229.9);

Tailwind

colors: {
  custom: {
    50: '#81b1cb',
    500: '#3f91b5',
    950: '#000000',
  },
}

SCSS

$custom: #3f91b5;
$custom-light: #81b1cb;
$custom-dark: #000000;

JSON

{
  "hex": "#3f91b5",
  "rgb": {
    "r": 63,
    "g": 145,
    "b": 181
  },
  "hsl": {
    "h": 198.305,
    "s": 48.361,
    "l": 47.843
  },
  "oklch": {
    "l": 0.62121,
    "c": 0.09568,
    "h": 229.9
  },
  "luminance": 0.24644
}

Semantic roles & 50–950 ramp

primary

#3F91B5

secondary

#C59C8A

accent

#7950D8

background

#F8FAFC

surface

#EFF5F8

border

#CACFD1

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #3F91B5

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

Preview Lab → · Contrast checker → · Palette generator →