#3F56CB#3F56CB

#3F56CB is a mid, vivid blue. Relative luminance 0.120; OKLCH L 50.5% C 0.183 H 270.1°. Best body text is #FFFFFF at 6.17:1 contrast (WCAG AA passes).

Color values

HEX	#3F56CB
RGB	rgb(63, 86, 203)
HSL	hsl(230, 57%, 52%)
HSV	hsv(230, 69%, 80%)
CMYK	cmyk(69%, 57.6%, 0%, 20.4%)
CIE-LAB	lab(41.25, 30.18, -63.38)
CIE-LCH	lch(41.25, 70.20, 295.46°)
OKLab	oklab(50.52% 0.0004 -0.1826)
OKLCH	oklch(50.52% 0.183 270.1)
XYZ	xyz(16.1535, 12.0226, 57.9576)
Luminance	0.1202 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F56CB #CBB43F

analogous

#3F9CCB #3F56CB #6E3FCB

triadic

#3F56CB #CB3F56 #56CB3F

tetradic

#3F56CB #CB3F9C #CBB43F #3FCB6E

square

#3F56CB #CB3F9C #CBB43F #3FCB6E

split-complementary

#3F56CB #CB6E3F #9CCB3F

monochromatic

#1F2C71 #2C3FA1 #3F56CB #6F80D8 #9FABE5

Accessibility & contrast

On white

6.17

#3F56CB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.40

#3F56CB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F56CB

6.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F56CB	#FFFFFF	#000000	##FFFFFF
##3F56CB	1.00	6.17	3.40	6.17
#FFFFFF	6.17	1.00	21.00	1.00
#000000	3.40	21.00	1.00	21.00
##FFFFFF	6.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0068CF

Deuteranopia (green-blind)

#005BC9

Tritanopia (blue-blind)

#007388

Achromatopsia (no color)

#616161

Design tokens & code

CSS

--color: #3f56cb;
/* rgb */ color: rgb(63, 86, 203);
/* oklch */ color: oklch(50.5% 0.183 270.1);

Tailwind

colors: {
  custom: {
    50: '#8585dc',
    500: '#3f56cb',
    950: '#000000',
  },
}

SCSS

$custom: #3f56cb;
$custom-light: #8585dc;
$custom-dark: #000000;

JSON

{
  "hex": "#3f56cb",
  "rgb": {
    "r": 63,
    "g": 86,
    "b": 203
  },
  "hsl": {
    "h": 230.143,
    "s": 57.377,
    "l": 52.157
  },
  "oklch": {
    "l": 0.50516,
    "c": 0.18262,
    "h": 270.1
  },
  "luminance": 0.12024
}

Semantic roles & 50–950 ramp

primary

#3F56CB

secondary

#D1C794

accent

#C747E1

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0C0B15

muted

#7D7C83

Preview Lab

Preview with #3F56CB

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

Preview Lab → · Contrast checker → · Palette generator →