#3F57D6#3F57D6

#3F57D6 is a mid, vivid blue. Relative luminance 0.127; OKLCH L 51.6% C 0.196 H 269.9°. Best body text is #FFFFFF at 5.92:1 contrast (WCAG AA passes).

Color values

HEX	#3F57D6
RGB	rgb(63, 87, 214)
HSL	hsl(230, 65%, 54%)
HSV	hsv(230, 71%, 84%)
CMYK	cmyk(70.6%, 59.3%, 0%, 16.1%)
CIE-LAB	lab(42.35, 33.44, -67.92)
CIE-LCH	lch(42.35, 75.71, 296.22°)
OKLab	oklab(51.6% -0.0003 -0.196)
OKLCH	oklch(51.6% 0.196 269.9)
XYZ	xyz(17.5915, 12.7264, 65.1346)
Luminance	0.1273 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F57D6 #D6BE3F

analogous

#3FA2D6 #3F57D6 #733FD6

triadic

#3F57D6 #D63F57 #57D63F

tetradic

#3F57D6 #D63FA2 #D6BE3F #3FD673

square

#3F57D6 #D63FA2 #D6BE3F #3FD673

split-complementary

#3F57D6 #D6733F #A2D63F

monochromatic

#1B2B7F #263CB2 #3F57D6 #7183E1 #A4AFEC

Accessibility & contrast

On white

5.92

#3F57D6 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.55

#3F57D6 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F57D6

5.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F57D6	#FFFFFF	#000000	##FFFFFF
##3F57D6	1.00	5.92	3.55	5.92
#FFFFFF	5.92	1.00	21.00	1.00
#000000	3.55	21.00	1.00	21.00
##FFFFFF	5.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006BDA

Deuteranopia (green-blind)

#005DD4

Tritanopia (blue-blind)

#00778E

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #3f57d6;
/* rgb */ color: rgb(63, 87, 214);
/* oklch */ color: oklch(51.6% 0.196 269.9);

Tailwind

colors: {
  custom: {
    50: '#8786e4',
    500: '#3f57d6',
    950: '#000000',
  },
}

SCSS

$custom: #3f57d6;
$custom-light: #8786e4;
$custom-dark: #000000;

JSON

{
  "hex": "#3f57d6",
  "rgb": {
    "r": 63,
    "g": 87,
    "b": 214
  },
  "hsl": {
    "h": 230.464,
    "s": 64.807,
    "l": 54.314
  },
  "oklch": {
    "l": 0.51597,
    "c": 0.19595,
    "h": 269.9
  },
  "luminance": 0.12728
}

Semantic roles & 50–950 ramp

primary

#3F57D6

secondary

#D8CE98

accent

#CD40E8

background

#F9F8FE

surface

#F1EFFC

border

#CBCAD5

text

#0D0B16

muted

#7E7C84

Preview Lab

Preview with #3F57D6

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

Preview Lab → · Contrast checker → · Palette generator →