#3F4BAB#3F4BAB

#3F4BAB is a mid, vivid blue. Relative luminance 0.090; OKLCH L 45.9% C 0.153 H 273.4°. Best body text is #FFFFFF at 7.48:1 contrast (WCAG AA passes).

Color values

HEX	#3F4BAB
RGB	rgb(63, 75, 171)
HSL	hsl(233, 46%, 46%)
HSV	hsv(233, 63%, 67%)
CMYK	cmyk(63.2%, 56.1%, 0%, 32.9%)
CIE-LAB	lab(36.04, 25.93, -53.08)
CIE-LCH	lch(36.04, 59.08, 296.04°)
OKLab	oklab(45.87% 0.0091 -0.1525)
OKLCH	oklch(45.87% 0.153 273.4)
XYZ	xyz(11.9142, 9.0282, 39.6349)
Luminance	0.0903 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F4BAB #AB9F3F

analogous

#3F81AB #3F4BAB #693FAB

triadic

#3F4BAB #AB3F4B #4BAB3F

tetradic

#3F4BAB #AB3F81 #AB9F3F #3FAB69

square

#3F4BAB #AB3F81 #AB9F3F #3FAB69

split-complementary

#3F4BAB #AB693F #81AB3F

monochromatic

#1E2452 #2F377E #3F4BAB #626DC5 #8F97D6

Accessibility & contrast

On white

7.48

#3F4BAB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.81

#3F4BAB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F4BAB

7.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F4BAB	#FFFFFF	#000000	##FFFFFF
##3F4BAB	1.00	7.48	2.81	7.48
#FFFFFF	7.48	1.00	21.00	1.00
#000000	2.81	21.00	1.00	21.00
##FFFFFF	7.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005AAE

Deuteranopia (green-blind)

#0050A9

Tritanopia (blue-blind)

#006273

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #3f4bab;
/* rgb */ color: rgb(63, 75, 171);
/* oklch */ color: oklch(45.9% 0.153 273.4);

Tailwind

colors: {
  custom: {
    50: '#7f7dc5',
    500: '#3f4bab',
    950: '#000000',
  },
}

SCSS

$custom: #3f4bab;
$custom-light: #7f7dc5;
$custom-dark: #000000;

JSON

{
  "hex": "#3f4bab",
  "rgb": {
    "r": 63,
    "g": 75,
    "b": 171
  },
  "hsl": {
    "h": 233.333,
    "s": 46.154,
    "l": 45.882
  },
  "oklch": {
    "l": 0.45871,
    "c": 0.15274,
    "h": 273.4
  },
  "luminance": 0.09029
}

Semantic roles & 50–950 ramp

primary

#3F4BAB

secondary

#C1BA85

accent

#C752D6

background

#F8F7FC

surface

#EFEEF8

border

#CAC9D1

text

#0B0913

muted

#7C7B82

Preview Lab

Preview with #3F4BAB

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

Preview Lab → · Contrast checker → · Palette generator →