#3F57EA#3F57EA

#3F57EA is a mid, highly saturated blue. Relative luminance 0.138; OKLCH L 53.3% C 0.222 H 269.8°. Best body text is #FFFFFF at 5.58:1 contrast (WCAG AA passes).

Color values

HEX	#3F57EA
RGB	rgb(63, 87, 234)
HSL	hsl(232, 80%, 58%)
HSV	hsv(232, 73%, 92%)
CMYK	cmyk(73.1%, 62.8%, 0%, 8.2%)
CIE-LAB	lab(43.96, 40.44, -76.65)
CIE-LCH	lch(43.96, 86.67, 297.82°)
OKLab	oklab(53.29% -0.0007 -0.2216)
OKLCH	oklch(53.29% 0.222 269.8)
XYZ	xyz(20.3043, 13.8115, 79.4218)
Luminance	0.1381 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F57EA #EAD23F

analogous

#3FACEA #3F57EA #7C3FEA

triadic

#3F57EA #EA3F57 #57EA3F

tetradic

#3F57EA #EA3FAC #EAD23F #3FEA7C

square

#3F57EA #EA3FAC #EAD23F #3FEA7C

split-complementary

#3F57EA #EA7C3F #ACEA3F

monochromatic

#11259D #1732D5 #3F57EA #7687F0 #ADB8F6

Accessibility & contrast

On white

5.58

#3F57EA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.76

#3F57EA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F57EA

5.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F57EA	#FFFFFF	#000000	##FFFFFF
##3F57EA	1.00	5.58	3.76	5.58
#FFFFFF	5.58	1.00	21.00	1.00
#000000	3.76	21.00	1.00	21.00
##FFFFFF	5.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0070EF

Deuteranopia (green-blind)

#0060E7

Tritanopia (blue-blind)

#007D98

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #3f57ea;
/* rgb */ color: rgb(63, 87, 234);
/* oklch */ color: oklch(53.3% 0.222 269.8);

Tailwind

colors: {
  custom: {
    50: '#8b86f2',
    500: '#3f57ea',
    950: '#000000',
  },
}

SCSS

$custom: #3f57ea;
$custom-light: #8b86f2;
$custom-dark: #000000;

JSON

{
  "hex": "#3f57ea",
  "rgb": {
    "r": 63,
    "g": 87,
    "b": 234
  },
  "hsl": {
    "h": 231.579,
    "s": 80.282,
    "l": 58.235
  },
  "oklch": {
    "l": 0.53289,
    "c": 0.22157,
    "h": 269.8
  },
  "luminance": 0.13814
}

Semantic roles & 50–950 ramp

primary

#3F57EA

secondary

#E4DBA0

accent

#DB31F7

background

#F9F8FE

surface

#F2EFFD

border

#CCCAD5

text

#0E0B17

muted

#7E7C85

Preview Lab

Preview with #3F57EA

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

Preview Lab → · Contrast checker → · Palette generator →