#3F57AF#3F57AF

#3F57AF is a mid, vivid blue. Relative luminance 0.110; OKLCH L 48.6% C 0.143 H 269.1°. Best body text is #FFFFFF at 6.58:1 contrast (WCAG AA passes).

Color values

HEX	#3F57AF
RGB	rgb(63, 87, 175)
HSL	hsl(227, 47%, 47%)
HSV	hsv(227, 64%, 69%)
CMYK	cmyk(64%, 50.3%, 0%, 31.4%)
CIE-LAB	lab(39.52, 19.55, -49.82)
CIE-LCH	lch(39.52, 53.52, 291.43°)
OKLab	oklab(48.59% -0.0023 -0.1427)
OKLCH	oklch(48.59% 0.143 269.1)
XYZ	xyz(13.1933, 10.9671, 41.9707)
Luminance	0.1097 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F57AF #AF973F

analogous

#3F8FAF #3F57AF #5F3FAF

triadic

#3F57AF #AF3F57 #57AF3F

tetradic

#3F57AF #AF3F8F #AF973F #3FAF5F

square

#3F57AF #AF3F8F #AF973F #3FAF5F

split-complementary

#3F57AF #AF5F3F #8FAF3F

monochromatic

#1F2A55 #2F4182 #3F57AF #6479C7 #91A0D7

Accessibility & contrast

On white

6.58

#3F57AF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.19

#3F57AF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F57AF

6.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F57AF	#FFFFFF	#000000	##FFFFFF
##3F57AF	1.00	6.58	3.19	6.58
#FFFFFF	6.58	1.00	21.00	1.00
#000000	3.19	21.00	1.00	21.00
##FFFFFF	6.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2762B2

Deuteranopia (green-blind)

#0858AD

Tritanopia (blue-blind)

#006B7B

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #3f57af;
/* rgb */ color: rgb(63, 87, 175);
/* oklch */ color: oklch(48.6% 0.143 269.1);

Tailwind

colors: {
  custom: {
    50: '#7f86c7',
    500: '#3f57af',
    950: '#000000',
  },
}

SCSS

$custom: #3f57af;
$custom-light: #7f86c7;
$custom-dark: #000000;

JSON

{
  "hex": "#3f57af",
  "rgb": {
    "r": 63,
    "g": 87,
    "b": 175
  },
  "hsl": {
    "h": 227.143,
    "s": 47.059,
    "l": 46.667
  },
  "oklch": {
    "l": 0.48586,
    "c": 0.14275,
    "h": 269.1
  },
  "luminance": 0.10968
}

Semantic roles & 50–950 ramp

primary

#3F57AF

secondary

#C3B687

accent

#BA51D7

background

#F8F8FC

surface

#EFEFF8

border

#CACAD1

text

#0B0B13

muted

#7C7C82

Preview Lab

Preview with #3F57AF

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

Preview Lab → · Contrast checker → · Palette generator →