#3F44B9#3F44B9

#3F44B9 is a mid, vivid blue. Relative luminance 0.087; OKLCH L 45.7% C 0.181 H 274.8°. Best body text is #FFFFFF at 7.67:1 contrast (WCAG AA passes).

Color values

HEX	#3F44B9
RGB	rgb(63, 68, 185)
HSL	hsl(238, 49%, 49%)
HSV	hsv(238, 66%, 73%)
CMYK	cmyk(65.9%, 63.2%, 0%, 27.5%)
CIE-LAB	lab(35.39, 35.27, -62.44)
CIE-LCH	lch(35.39, 71.71, 299.46°)
OKLab	oklab(45.73% 0.0151 -0.18)
OKLCH	oklch(45.73% 0.181 274.8)
XYZ	xyz(12.8711, 8.6927, 46.8891)
Luminance	0.0869 (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

#3F44B9 #B9B43F

analogous

#3F81B9 #3F44B9 #773FB9

triadic

#3F44B9 #B93F44 #44B93F

tetradic

#3F44B9 #B93F81 #B9B43F #3FB977

square

#3F44B9 #B93F81 #B9B43F #3FB977

split-complementary

#3F44B9 #B9773F #81B93F

monochromatic

#20225E #2F338B #3F44B9 #696DCC #979ADC

Accessibility & contrast

On white

7.67

#3F44B9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.74

#3F44B9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F44B9

7.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F44B9	#FFFFFF	#000000	##FFFFFF
##3F44B9	1.00	7.67	2.74	7.67
#FFFFFF	7.67	1.00	21.00	1.00
#000000	2.74	21.00	1.00	21.00
##FFFFFF	7.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0059BD

Deuteranopia (green-blind)

#004EB7

Tritanopia (blue-blind)

#006278

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #3f44b9;
/* rgb */ color: rgb(63, 68, 185);
/* oklch */ color: oklch(45.7% 0.181 274.8);

Tailwind

colors: {
  custom: {
    50: '#8378cf',
    500: '#3f44b9',
    950: '#000000',
  },
}

SCSS

$custom: #3f44b9;
$custom-light: #8378cf;
$custom-dark: #000000;

JSON

{
  "hex": "#3f44b9",
  "rgb": {
    "r": 63,
    "g": 68,
    "b": 185
  },
  "hsl": {
    "h": 237.541,
    "s": 49.194,
    "l": 48.627
  },
  "oklch": {
    "l": 0.4573,
    "c": 0.18065,
    "h": 274.8
  },
  "luminance": 0.08694
}

Semantic roles & 50–950 ramp

primary

#3F44B9

secondary

#C7C58D

accent

#D34FD9

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0914

muted

#7D7B82

Preview Lab

Preview with #3F44B9

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

Preview Lab → · Contrast checker → · Palette generator →