#3F44B4#3F44B4

#3F44B4 is a mid, vivid blue. Relative luminance 0.085; OKLCH L 45.3% C 0.174 H 275.1°. Best body text is #FFFFFF at 7.79:1 contrast (WCAG AA passes).

Color values

HEX	#3F44B4
RGB	rgb(63, 68, 180)
HSL	hsl(237, 48%, 48%)
HSV	hsv(237, 65%, 71%)
CMYK	cmyk(65%, 62.2%, 0%, 29.4%)
CIE-LAB	lab(34.97, 33.55, -60.15)
CIE-LCH	lch(34.97, 68.88, 299.15°)
OKLab	oklab(45.3% 0.0153 -0.1733)
OKLCH	oklch(45.3% 0.174 275.1)
XYZ	xyz(12.3525, 8.4852, 44.1580)
Luminance	0.0849 (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

#3F44B4 #B4AF3F

analogous

#3F7EB4 #3F44B4 #753FB4

triadic

#3F44B4 #B43F44 #44B43F

tetradic

#3F44B4 #B43F7E #B4AF3F #3FB475

square

#3F44B4 #B43F7E #B4AF3F #3FB475

split-complementary

#3F44B4 #B4753F #7EB43F

monochromatic

#1F2259 #2F3387 #3F44B4 #676BCA #9497DA

Accessibility & contrast

On white

7.79

#3F44B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.70

#3F44B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F44B4

7.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F44B4	#FFFFFF	#000000	##FFFFFF
##3F44B4	1.00	7.79	2.70	7.79
#FFFFFF	7.79	1.00	21.00	1.00
#000000	2.70	21.00	1.00	21.00
##FFFFFF	7.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0057B8

Deuteranopia (green-blind)

#004DB2

Tritanopia (blue-blind)

#006075

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #3f44b4;
/* rgb */ color: rgb(63, 68, 180);
/* oklch */ color: oklch(45.3% 0.174 275.1);

Tailwind

colors: {
  custom: {
    50: '#8278cb',
    500: '#3f44b4',
    950: '#000000',
  },
}

SCSS

$custom: #3f44b4;
$custom-light: #8278cb;
$custom-dark: #000000;

JSON

{
  "hex": "#3f44b4",
  "rgb": {
    "r": 63,
    "g": 68,
    "b": 180
  },
  "hsl": {
    "h": 237.436,
    "s": 48.148,
    "l": 47.647
  },
  "oklch": {
    "l": 0.453,
    "c": 0.17401,
    "h": 275.1
  },
  "luminance": 0.08486
}

Semantic roles & 50–950 ramp

primary

#3F44B4

secondary

#C5C28A

accent

#D250D8

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0913

muted

#7D7B82

Preview Lab

Preview with #3F44B4

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

Preview Lab → · Contrast checker → · Palette generator →