#3F4CBB#3F4CBB

#3F4CBB is a mid, vivid blue. Relative luminance 0.098; OKLCH L 47.3% C 0.173 H 272.8°. Best body text is #FFFFFF at 7.09:1 contrast (WCAG AA passes).

Color values

HEX	#3F4CBB
RGB	rgb(63, 76, 187)
HSL	hsl(234, 50%, 49%)
HSV	hsv(234, 66%, 73%)
CMYK	cmyk(66.3%, 59.4%, 0%, 26.7%)
CIE-LAB	lab(37.50, 30.91, -60.16)
CIE-LCH	lch(37.50, 67.63, 297.19°)
OKLab	oklab(47.34% 0.0084 -0.1733)
OKLCH	oklch(47.34% 0.173 272.8)
XYZ	xyz(13.6010, 9.8123, 48.1813)
Luminance	0.0981 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F4CBB #BBAE3F

analogous

#3F8ABB #3F4CBB #703FBB

triadic

#3F4CBB #BB3F4C #4CBB3F

tetradic

#3F4CBB #BB3F8A #BBAE3F #3FBB70

square

#3F4CBB #BB3F8A #BBAE3F #3FBB70

split-complementary

#3F4CBB #BB703F #8ABB3F

monochromatic

#20275F #30398D #3F4CBB #6A75CD #989FDC

Accessibility & contrast

On white

7.09

#3F4CBB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.96

#3F4CBB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F4CBB

7.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F4CBB	#FFFFFF	#000000	##FFFFFF
##3F4CBB	1.00	7.09	2.96	7.09
#FFFFFF	7.09	1.00	21.00	1.00
#000000	2.96	21.00	1.00	21.00
##FFFFFF	7.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005EBF

Deuteranopia (green-blind)

#0053B9

Tritanopia (blue-blind)

#00677C

Achromatopsia (no color)

#585858

Design tokens & code

CSS

--color: #3f4cbb;
/* rgb */ color: rgb(63, 76, 187);
/* oklch */ color: oklch(47.3% 0.173 272.8);

Tailwind

colors: {
  custom: {
    50: '#827ed0',
    500: '#3f4cbb',
    950: '#000000',
  },
}

SCSS

$custom: #3f4cbb;
$custom-light: #827ed0;
$custom-dark: #000000;

JSON

{
  "hex": "#3f4cbb",
  "rgb": {
    "r": 63,
    "g": 76,
    "b": 187
  },
  "hsl": {
    "h": 233.71,
    "s": 49.6,
    "l": 49.02
  },
  "oklch": {
    "l": 0.47342,
    "c": 0.17347,
    "h": 272.8
  },
  "luminance": 0.09814
}

Semantic roles & 50–950 ramp

primary

#3F4CBB

secondary

#C8C28E

accent

#CB4FD9

background

#F8F7FC

surface

#F0EEF9

border

#CBC9D2

text

#0C0914

muted

#7D7B82

Preview Lab

Preview with #3F4CBB

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

Preview Lab → · Contrast checker → · Palette generator →