#3F56D9#3F56D9

#3F56D9 is a mid, highly saturated blue. Relative luminance 0.127; OKLCH L 51.7% C 0.201 H 270.1°. Best body text is #FFFFFF at 5.92:1 contrast (WCAG AA passes).

Color values

HEX	#3F56D9
RGB	rgb(63, 86, 217)
HSL	hsl(231, 67%, 55%)
HSV	hsv(231, 71%, 85%)
CMYK	cmyk(71%, 60.4%, 0%, 14.9%)
CIE-LAB	lab(42.34, 35.13, -69.65)
CIE-LCH	lch(42.34, 78.01, 296.76°)
OKLab	oklab(51.66% 0.0004 -0.201)
OKLCH	oklch(51.66% 0.201 270.1)
XYZ	xyz(17.8978, 12.7203, 67.1442)
Luminance	0.1272 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F56D9 #D9C23F

analogous

#3FA3D9 #3F56D9 #753FD9

triadic

#3F56D9 #D93F56 #56D93F

tetradic

#3F56D9 #D93FA3 #D9C23F #3FD975

square

#3F56D9 #D93FA3 #D9C23F #3FD975

split-complementary

#3F56D9 #D9753F #A3D93F

monochromatic

#1A2A84 #243AB7 #3F56D9 #7283E3 #A5B0ED

Accessibility & contrast

On white

5.92

#3F56D9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.54

#3F56D9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F56D9

5.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F56D9	#FFFFFF	#000000	##FFFFFF
##3F56D9	1.00	5.92	3.54	5.92
#FFFFFF	5.92	1.00	21.00	1.00
#000000	3.54	21.00	1.00	21.00
##FFFFFF	5.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006BDD

Deuteranopia (green-blind)

#005DD6

Tritanopia (blue-blind)

#00778F

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #3f56d9;
/* rgb */ color: rgb(63, 86, 217);
/* oklch */ color: oklch(51.7% 0.201 270.1);

Tailwind

colors: {
  custom: {
    50: '#8885e6',
    500: '#3f56d9',
    950: '#000000',
  },
}

SCSS

$custom: #3f56d9;
$custom-light: #8885e6;
$custom-dark: #000000;

JSON

{
  "hex": "#3f56d9",
  "rgb": {
    "r": 63,
    "g": 86,
    "b": 217
  },
  "hsl": {
    "h": 231.039,
    "s": 66.957,
    "l": 54.902
  },
  "oklch": {
    "l": 0.51664,
    "c": 0.20104,
    "h": 270.1
  },
  "luminance": 0.12722
}

Semantic roles & 50–950 ramp

primary

#3F56D9

secondary

#DAD19A

accent

#D03EEA

background

#F9F8FE

surface

#F1EFFC

border

#CBCAD5

text

#0D0B16

muted

#7E7C84

Preview Lab

Preview with #3F56D9

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

Preview Lab → · Contrast checker → · Palette generator →