#3F56B2#3F56B2

#3F56B2 is a mid, vivid blue. Relative luminance 0.109; OKLCH L 48.6% C 0.148 H 269.6°. Best body text is #FFFFFF at 6.59:1 contrast (WCAG AA passes).

Color values

HEX	#3F56B2
RGB	rgb(63, 86, 178)
HSL	hsl(228, 48%, 47%)
HSV	hsv(228, 65%, 70%)
CMYK	cmyk(64.6%, 51.7%, 0%, 30.2%)
CIE-LAB	lab(39.45, 21.27, -51.70)
CIE-LCH	lch(39.45, 55.91, 292.36°)
OKLab	oklab(48.6% -0.001 -0.1483)
OKLCH	oklch(48.6% 0.148 269.6)
XYZ	xyz(13.4108, 10.9255, 43.5129)
Luminance	0.1093 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F56B2 #B29B3F

analogous

#3F90B2 #3F56B2 #623FB2

triadic

#3F56B2 #B23F56 #56B23F

tetradic

#3F56B2 #B23F90 #B29B3F #3FB262

square

#3F56B2 #B23F90 #B29B3F #3FB262

split-complementary

#3F56B2 #B2623F #90B23F

monochromatic

#1F2A58 #2F4085 #3F56B2 #6679C9 #93A1D9

Accessibility & contrast

On white

6.59

#3F56B2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.19

#3F56B2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F56B2

6.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F56B2	#FFFFFF	#000000	##FFFFFF
##3F56B2	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)

#2062B5

Deuteranopia (green-blind)

#0058B0

Tritanopia (blue-blind)

#006B7C

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #3f56b2;
/* rgb */ color: rgb(63, 86, 178);
/* oklch */ color: oklch(48.6% 0.148 269.6);

Tailwind

colors: {
  custom: {
    50: '#8085ca',
    500: '#3f56b2',
    950: '#000000',
  },
}

SCSS

$custom: #3f56b2;
$custom-light: #8085ca;
$custom-dark: #000000;

JSON

{
  "hex": "#3f56b2",
  "rgb": {
    "r": 63,
    "g": 86,
    "b": 178
  },
  "hsl": {
    "h": 228,
    "s": 47.718,
    "l": 47.255
  },
  "oklch": {
    "l": 0.48597,
    "c": 0.14828,
    "h": 269.6
  },
  "luminance": 0.10927
}

Semantic roles & 50–950 ramp

primary

#3F56B2

secondary

#C4B889

accent

#BC50D7

background

#F8F8FC

surface

#EFEFF8

border

#CACAD1

text

#0B0B13

muted

#7C7C82

Preview Lab

Preview with #3F56B2

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

Preview Lab → · Contrast checker → · Palette generator →