#3F91CB#3F91CB

#3F91CB is a light, moderate cyan. Relative luminance 0.256; OKLCH L 63.2% C 0.118 H 242.7°. Best body text is #000000 at 6.12:1 contrast (WCAG AA passes).

Color values

HEX	#3F91CB
RGB	rgb(63, 145, 203)
HSL	hsl(205, 57%, 52%)
HSV	hsv(205, 69%, 80%)
CMYK	cmyk(69%, 28.6%, 0%, 20.4%)
CIE-LAB	lab(57.67, -6.20, -37.15)
CIE-LCH	lch(57.67, 37.66, 260.53°)
OKLab	oklab(63.19% -0.0541 -0.1049)
OKLCH	oklch(63.19% 0.118 242.7)
XYZ	xyz(22.9507, 25.6169, 60.2233)
Luminance	0.2562 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F91CB #CB793F

analogous

#3FCBBF #3F91CB #3F4BCB

triadic

#3F91CB #CB3F91 #91CB3F

tetradic

#3F91CB #BF3FCB #CB793F #4BCB3F

square

#3F91CB #BF3FCB #CB793F #4BCB3F

split-complementary

#3F91CB #CB3F4B #CBBF3F

monochromatic

#1F4F71 #2C70A1 #3F91CB #6FADD8 #9FC8E5

Accessibility & contrast

On white

3.43

#3F91CB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.12

#3F91CB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F91CB

6.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F91CB	#FFFFFF	#000000	##000000
##3F91CB	1.00	3.43	6.12	6.12
#FFFFFF	3.43	1.00	21.00	21.00
#000000	6.12	21.00	1.00	1.00
##000000	6.12	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7792CE

Deuteranopia (green-blind)

#6385CA

Tritanopia (blue-blind)

#009FA5

Achromatopsia (no color)

#8B8B8B

Design tokens & code

CSS

--color: #3f91cb;
/* rgb */ color: rgb(63, 145, 203);
/* oklch */ color: oklch(63.2% 0.118 242.7);

Tailwind

colors: {
  custom: {
    50: '#84b1db',
    500: '#3f91cb',
    950: '#000000',
  },
}

SCSS

$custom: #3f91cb;
$custom-light: #84b1db;
$custom-dark: #000000;

JSON

{
  "hex": "#3f91cb",
  "rgb": {
    "r": 63,
    "g": 145,
    "b": 203
  },
  "hsl": {
    "h": 204.857,
    "s": 57.377,
    "l": 52.157
  },
  "oklch": {
    "l": 0.63185,
    "c": 0.11801,
    "h": 242.7
  },
  "luminance": 0.25619
}

Semantic roles & 50–950 ramp

primary

#3F91CB

secondary

#D1AE94

accent

#8747E1

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #3F91CB

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

Preview Lab → · Contrast checker → · Palette generator →