#4251AA#4251AA

#4251AA is a mid, vivid blue. Relative luminance 0.099; OKLCH L 47.2% C 0.143 H 272.6°. Best body text is #FFFFFF at 7.03:1 contrast (WCAG AA passes).

Color values

HEX	#4251AA
RGB	rgb(66, 81, 170)
HSL	hsl(231, 44%, 46%)
HSV	hsv(231, 61%, 67%)
CMYK	cmyk(61.2%, 52.4%, 0%, 33.3%)
CIE-LAB	lab(37.74, 22.23, -49.72)
CIE-LCH	lch(37.74, 54.47, 294.09°)
OKLab	oklab(47.18% 0.0064 -0.1424)
OKLCH	oklch(47.18% 0.143 272.6)
XYZ	xyz(12.4425, 9.9444, 39.2862)
Luminance	0.0994 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4251AA #AA9B42

analogous

#4285AA #4251AA #6742AA

triadic

#4251AA #AA4251 #51AA42

tetradic

#4251AA #AA4285 #AA9B42 #42AA67

square

#4251AA #AA4285 #AA9B42 #42AA67

split-complementary

#4251AA #AA6742 #85AA42

monochromatic

#202752 #313C7E #4251AA #6673C3 #929BD5

Accessibility & contrast

On white

7.03

#4251AA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.99

#4251AA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #4251AA

7.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4251AA	#FFFFFF	#000000	##FFFFFF
##4251AA	1.00	7.03	2.99	7.03
#FFFFFF	7.03	1.00	21.00	1.00
#000000	2.99	21.00	1.00	21.00
##FFFFFF	7.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1D5EAD

Deuteranopia (green-blind)

#0054A8

Tritanopia (blue-blind)

#006675

Achromatopsia (no color)

#595959

Design tokens & code

CSS

--color: #4251aa;
/* rgb */ color: rgb(66, 81, 170);
/* oklch */ color: oklch(47.2% 0.143 272.6);

Tailwind

colors: {
  custom: {
    50: '#8081c4',
    500: '#4251aa',
    950: '#000000',
  },
}

SCSS

$custom: #4251aa;
$custom-light: #8081c4;
$custom-dark: #000000;

JSON

{
  "hex": "#4251aa",
  "rgb": {
    "r": 66,
    "g": 81,
    "b": 170
  },
  "hsl": {
    "h": 231.346,
    "s": 44.068,
    "l": 46.275
  },
  "oklch": {
    "l": 0.47177,
    "c": 0.14259,
    "h": 272.6
  },
  "luminance": 0.09945
}

Semantic roles & 50–950 ramp

primary

#4251AA

secondary

#C0B888

accent

#C154D4

background

#F8F7FC

surface

#EFEEF8

border

#CAC9D1

text

#0B0A13

muted

#7C7C82

Preview Lab

Preview with #4251AA

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

Preview Lab → · Contrast checker → · Palette generator →