#3F5FCB#3F5FCB

#3F5FCB is a mid, vivid blue. Relative luminance 0.136; OKLCH L 52.3% C 0.172 H 267.6°. Best body text is #FFFFFF at 5.66:1 contrast (WCAG AA passes).

Color values

HEX	#3F5FCB
RGB	rgb(63, 95, 203)
HSL	hsl(226, 57%, 52%)
HSV	hsv(226, 69%, 80%)
CMYK	cmyk(69%, 53.2%, 0%, 20.4%)
CIE-LAB	lab(43.58, 24.44, -59.60)
CIE-LCH	lch(43.58, 64.41, 292.30°)
OKLab	oklab(52.26% -0.0071 -0.1714)
OKLCH	oklch(52.26% 0.172 267.6)
XYZ	xyz(16.9179, 13.5513, 58.2124)
Luminance	0.1355 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F5FCB #CBAB3F

analogous

#3FA5CB #3F5FCB #653FCB

triadic

#3F5FCB #CB3F5F #5FCB3F

tetradic

#3F5FCB #CB3FA5 #CBAB3F #3FCB65

square

#3F5FCB #CB3FA5 #CBAB3F #3FCB65

split-complementary

#3F5FCB #CB653F #A5CB3F

monochromatic

#1F3171 #2C47A1 #3F5FCB #6F87D8 #9FAFE5

Accessibility & contrast

On white

5.66

#3F5FCB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.71

#3F5FCB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F5FCB

5.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F5FCB	#FFFFFF	#000000	##FFFFFF
##3F5FCB	1.00	5.66	3.71	5.66
#FFFFFF	5.66	1.00	21.00	1.00
#000000	3.71	21.00	1.00	21.00
##FFFFFF	5.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#116ECF

Deuteranopia (green-blind)

#0061C9

Tritanopia (blue-blind)

#00798C

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #3f5fcb;
/* rgb */ color: rgb(63, 95, 203);
/* oklch */ color: oklch(52.3% 0.172 267.6);

Tailwind

colors: {
  custom: {
    50: '#848cdc',
    500: '#3f5fcb',
    950: '#000000',
  },
}

SCSS

$custom: #3f5fcb;
$custom-light: #848cdc;
$custom-dark: #000000;

JSON

{
  "hex": "#3f5fcb",
  "rgb": {
    "r": 63,
    "g": 95,
    "b": 203
  },
  "hsl": {
    "h": 226.286,
    "s": 57.377,
    "l": 52.157
  },
  "oklch": {
    "l": 0.52265,
    "c": 0.17152,
    "h": 267.6
  },
  "luminance": 0.13553
}

Semantic roles & 50–950 ramp

primary

#3F5FCB

secondary

#D1C394

accent

#BE47E1

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3F5FCB

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

Preview Lab → · Contrast checker → · Palette generator →