#3F44B2#3F44B2

#3F44B2 is a mid, vivid blue. Relative luminance 0.084; OKLCH L 45.1% C 0.171 H 275.2°. Best body text is #FFFFFF at 7.83:1 contrast (WCAG AA passes).

Color values

HEX	#3F44B2
RGB	rgb(63, 68, 178)
HSL	hsl(237, 48%, 47%)
HSV	hsv(237, 65%, 70%)
CMYK	cmyk(64.6%, 61.8%, 0%, 30.2%)
CIE-LAB	lab(34.81, 32.86, -59.23)
CIE-LCH	lch(34.81, 67.74, 299.02°)
OKLab	oklab(45.13% 0.0154 -0.1706)
OKLCH	oklch(45.13% 0.171 275.2)
XYZ	xyz(12.1503, 8.4043, 43.0927)
Luminance	0.0840 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F44B2 #B2AD3F

analogous

#3F7EB2 #3F44B2 #733FB2

triadic

#3F44B2 #B23F44 #44B23F

tetradic

#3F44B2 #B23F7E #B2AD3F #3FB273

square

#3F44B2 #B23F7E #B2AD3F #3FB273

split-complementary

#3F44B2 #B2733F #7EB23F

monochromatic

#1F2158 #2F3385 #3F44B2 #666AC9 #9396D9

Accessibility & contrast

On white

7.83

#3F44B2 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.68

#3F44B2 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F44B2

7.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F44B2	#FFFFFF	#000000	##FFFFFF
##3F44B2	1.00	7.83	2.68	7.83
#FFFFFF	7.83	1.00	21.00	1.00
#000000	2.68	21.00	1.00	21.00
##FFFFFF	7.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0057B6

Deuteranopia (green-blind)

#004DB0

Tritanopia (blue-blind)

#005F74

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #3f44b2;
/* rgb */ color: rgb(63, 68, 178);
/* oklch */ color: oklch(45.1% 0.171 275.2);

Tailwind

colors: {
  custom: {
    50: '#8178ca',
    500: '#3f44b2',
    950: '#000000',
  },
}

SCSS

$custom: #3f44b2;
$custom-light: #8178ca;
$custom-dark: #000000;

JSON

{
  "hex": "#3f44b2",
  "rgb": {
    "r": 63,
    "g": 68,
    "b": 178
  },
  "hsl": {
    "h": 237.391,
    "s": 47.718,
    "l": 47.255
  },
  "oklch": {
    "l": 0.4513,
    "c": 0.17132,
    "h": 275.2
  },
  "luminance": 0.08405
}

Semantic roles & 50–950 ramp

primary

#3F44B2

secondary

#C4C189

accent

#D150D7

background

#F8F7FC

surface

#F0EDF8

border

#CBC8D1

text

#0C0913

muted

#7D7B82

Preview Lab

Preview with #3F44B2

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

Preview Lab → · Contrast checker → · Palette generator →