#4151AB#4151AB

#4151AB is a mid, vivid blue. Relative luminance 0.099; OKLCH L 47.2% C 0.144 H 272.1°. Best body text is #FFFFFF at 7.02:1 contrast (WCAG AA passes).

Color values

HEX	#4151AB
RGB	rgb(65, 81, 171)
HSL	hsl(231, 45%, 46%)
HSV	hsv(231, 62%, 67%)
CMYK	cmyk(62%, 52.6%, 0%, 32.9%)
CIE-LAB	lab(37.75, 22.39, -50.31)
CIE-LCH	lch(37.75, 55.07, 293.99°)
OKLab	oklab(47.19% 0.0054 -0.1442)
OKLCH	oklch(47.19% 0.144 272.1)
XYZ	xyz(12.4706, 9.9479, 39.7831)
Luminance	0.0995 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4151AB #AB9B41

analogous

#4186AB #4151AB #6641AB

triadic

#4151AB #AB4151 #51AB41

tetradic

#4151AB #AB4186 #AB9B41 #41AB66

square

#4151AB #AB4186 #AB9B41 #41AB66

split-complementary

#4151AB #AB6641 #86AB41

monochromatic

#1F2752 #303C7F #4151AB #6573C4 #919BD5

Accessibility & contrast

On white

7.02

#4151AB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.99

#4151AB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4151AB

7.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4151AB	#FFFFFF	#000000	##FFFFFF
##4151AB	1.00	7.02	2.99	7.02
#FFFFFF	7.02	1.00	21.00	1.00
#000000	2.99	21.00	1.00	21.00
##FFFFFF	7.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B5EAE

Deuteranopia (green-blind)

#0054A9

Tritanopia (blue-blind)

#006676

Achromatopsia (no color)

#595959

Design tokens & code

CSS

--color: #4151ab;
/* rgb */ color: rgb(65, 81, 171);
/* oklch */ color: oklch(47.2% 0.144 272.1);

Tailwind

colors: {
  custom: {
    50: '#8081c5',
    500: '#4151ab',
    950: '#000000',
  },
}

SCSS

$custom: #4151ab;
$custom-light: #8081c5;
$custom-dark: #000000;

JSON

{
  "hex": "#4151ab",
  "rgb": {
    "r": 65,
    "g": 81,
    "b": 171
  },
  "hsl": {
    "h": 230.943,
    "s": 44.915,
    "l": 46.275
  },
  "oklch": {
    "l": 0.47187,
    "c": 0.1443,
    "h": 272.1
  },
  "luminance": 0.09949
}

Semantic roles & 50–950 ramp

primary

#4151AB

secondary

#C1B887

accent

#C153D5

background

#F8F7FC

surface

#EFEEF8

border

#CAC9D1

text

#0B0A13

muted

#7C7C82

Preview Lab

Preview with #4151AB

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

Preview Lab → · Contrast checker → · Palette generator →