#3F91CC#3F91CC

#3F91CC is a light, moderate cyan. Relative luminance 0.257; OKLCH L 63.2% C 0.119 H 243.2°. Best body text is #000000 at 6.13:1 contrast (WCAG AA passes).

Color values

HEX	#3F91CC
RGB	rgb(63, 145, 204)
HSL	hsl(205, 58%, 52%)
HSV	hsv(205, 69%, 80%)
CMYK	cmyk(69.1%, 28.9%, 0%, 20%)
CIE-LAB	lab(57.72, -5.85, -37.64)
CIE-LCH	lch(57.72, 38.10, 261.16°)
OKLab	oklab(63.24% -0.0538 -0.1063)
OKLCH	oklch(63.24% 0.119 243.2)
XYZ	xyz(23.0702, 25.6647, 60.8530)
Luminance	0.2567 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F91CC #CC7A3F

analogous

#3FCCC0 #3F91CC #3F4BCC

triadic

#3F91CC #CC3F91 #91CC3F

tetradic

#3F91CC #C03FCC #CC7A3F #4BCC3F

square

#3F91CC #C03FCC #CC7A3F #4BCC3F

split-complementary

#3F91CC #CC3F4B #CCC03F

monochromatic

#1E4F72 #2B71A3 #3F91CC #6FADD9 #A0C8E6

Accessibility & contrast

On white

3.42

#3F91CC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.13

#3F91CC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F91CC

6.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F91CC	#FFFFFF	#000000	##000000
##3F91CC	1.00	3.42	6.13	6.13
#FFFFFF	3.42	1.00	21.00	21.00
#000000	6.13	21.00	1.00	1.00
##000000	6.13	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7692CF

Deuteranopia (green-blind)

#6385CB

Tritanopia (blue-blind)

#009FA6

Achromatopsia (no color)

#8B8B8B

Design tokens & code

CSS

--color: #3f91cc;
/* rgb */ color: rgb(63, 145, 204);
/* oklch */ color: oklch(63.2% 0.119 243.2);

Tailwind

colors: {
  custom: {
    50: '#84b1dc',
    500: '#3f91cc',
    950: '#000000',
  },
}

SCSS

$custom: #3f91cc;
$custom-light: #84b1dc;
$custom-dark: #000000;

JSON

{
  "hex": "#3f91cc",
  "rgb": {
    "r": 63,
    "g": 145,
    "b": 204
  },
  "hsl": {
    "h": 205.106,
    "s": 58.025,
    "l": 52.353
  },
  "oklch": {
    "l": 0.63236,
    "c": 0.11914,
    "h": 243.2
  },
  "luminance": 0.25667
}

Semantic roles & 50–950 ramp

primary

#3F91CC

secondary

#D2AE95

accent

#8747E1

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #3F91CC

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

Preview Lab → · Contrast checker → · Palette generator →