#3F59D9#3F59D9

#3F59D9 is a mid, vivid blue. Relative luminance 0.132; OKLCH L 52.2% C 0.197 H 269.5°. Best body text is #FFFFFF at 5.77:1 contrast (WCAG AA passes).

Color values

HEX	#3F59D9
RGB	rgb(63, 89, 217)
HSL	hsl(230, 67%, 55%)
HSV	hsv(230, 71%, 85%)
CMYK	cmyk(71%, 59%, 0%, 14.9%)
CIE-LAB	lab(43.08, 33.24, -68.45)
CIE-LCH	lch(43.08, 76.09, 295.91°)
OKLab	oklab(52.21% -0.0018 -0.1975)
OKLCH	oklch(52.21% 0.197 269.5)
XYZ	xyz(18.1424, 13.2094, 67.2257)
Luminance	0.1321 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F59D9 #D9BF3F

analogous

#3FA6D9 #3F59D9 #723FD9

triadic

#3F59D9 #D93F59 #59D93F

tetradic

#3F59D9 #D93FA6 #D9BF3F #3FD972

square

#3F59D9 #D93FA6 #D9BF3F #3FD972

split-complementary

#3F59D9 #D9723F #A6D93F

monochromatic

#1A2C84 #243DB7 #3F59D9 #7285E3 #A5B1ED

Accessibility & contrast

On white

5.77

#3F59D9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.64

#3F59D9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F59D9

5.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F59D9	#FFFFFF	#000000	##FFFFFF
##3F59D9	1.00	5.77	3.64	5.77
#FFFFFF	5.77	1.00	21.00	1.00
#000000	3.64	21.00	1.00	21.00
##FFFFFF	5.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006DDD

Deuteranopia (green-blind)

#005FD6

Tritanopia (blue-blind)

#007990

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #3f59d9;
/* rgb */ color: rgb(63, 89, 217);
/* oklch */ color: oklch(52.2% 0.197 269.5);

Tailwind

colors: {
  custom: {
    50: '#8887e6',
    500: '#3f59d9',
    950: '#000000',
  },
}

SCSS

$custom: #3f59d9;
$custom-light: #8887e6;
$custom-dark: #000000;

JSON

{
  "hex": "#3f59d9",
  "rgb": {
    "r": 63,
    "g": 89,
    "b": 217
  },
  "hsl": {
    "h": 229.87,
    "s": 66.957,
    "l": 54.902
  },
  "oklch": {
    "l": 0.52212,
    "c": 0.19748,
    "h": 269.5
  },
  "luminance": 0.13211
}

Semantic roles & 50–950 ramp

primary

#3F59D9

secondary

#DACF9A

accent

#CD3EEA

background

#F9F8FE

surface

#F1EFFC

border

#CBCAD5

text

#0D0B16

muted

#7E7C84

Preview Lab

Preview with #3F59D9

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

Preview Lab → · Contrast checker → · Palette generator →