#3F57AE#3F57AE

#3F57AE is a mid, vivid blue. Relative luminance 0.109; OKLCH L 48.5% C 0.141 H 269.0°. Best body text is #FFFFFF at 6.59:1 contrast (WCAG AA passes).

Color values

HEX	#3F57AE
RGB	rgb(63, 87, 174)
HSL	hsl(227, 47%, 46%)
HSV	hsv(227, 64%, 68%)
CMYK	cmyk(63.8%, 50%, 0%, 31.8%)
CIE-LAB	lab(39.46, 19.20, -49.34)
CIE-LCH	lch(39.46, 52.94, 291.26°)
OKLab	oklab(48.52% -0.0024 -0.1413)
OKLCH	oklch(48.52% 0.141 269)
XYZ	xyz(13.0955, 10.9280, 41.4554)
Luminance	0.1093 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F57AE #AE963F

analogous

#3F8FAE #3F57AE #5F3FAE

triadic

#3F57AE #AE3F57 #57AE3F

tetradic

#3F57AE #AE3F8F #AE963F #3FAE5F

square

#3F57AE #AE3F8F #AE963F #3FAE5F

split-complementary

#3F57AE #AE5F3F #8FAE3F

monochromatic

#1E2A54 #2F4181 #3F57AE #6479C7 #90A0D7

Accessibility & contrast

On white

6.59

#3F57AE on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.19

#3F57AE on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F57AE

6.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F57AE	#FFFFFF	#000000	##FFFFFF
##3F57AE	1.00	6.59	3.19	6.59
#FFFFFF	6.59	1.00	21.00	1.00
#000000	3.19	21.00	1.00	21.00
##FFFFFF	6.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2862B1

Deuteranopia (green-blind)

#0C58AC

Tritanopia (blue-blind)

#006B7A

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #3f57ae;
/* rgb */ color: rgb(63, 87, 174);
/* oklch */ color: oklch(48.5% 0.141 269.0);

Tailwind

colors: {
  custom: {
    50: '#7f86c7',
    500: '#3f57ae',
    950: '#000000',
  },
}

SCSS

$custom: #3f57ae;
$custom-light: #7f86c7;
$custom-dark: #000000;

JSON

{
  "hex": "#3f57ae",
  "rgb": {
    "r": 63,
    "g": 87,
    "b": 174
  },
  "hsl": {
    "h": 227.027,
    "s": 46.835,
    "l": 46.471
  },
  "oklch": {
    "l": 0.48515,
    "c": 0.14133,
    "h": 269
  },
  "luminance": 0.10929
}

Semantic roles & 50–950 ramp

primary

#3F57AE

secondary

#C2B587

accent

#BA51D6

background

#F8F8FC

surface

#EFEFF8

border

#CACAD1

text

#0B0B13

muted

#7C7C82

Preview Lab

Preview with #3F57AE

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

Preview Lab → · Contrast checker → · Palette generator →