#4251BF#4251BF

#4251BF is a mid, vivid blue. Relative luminance 0.108; OKLCH L 48.8% C 0.172 H 272.5°. Best body text is #FFFFFF at 6.64:1 contrast (WCAG AA passes).

Color values

HEX	#4251BF
RGB	rgb(66, 81, 191)
HSL	hsl(233, 49%, 50%)
HSV	hsv(233, 65%, 75%)
CMYK	cmyk(65.4%, 57.6%, 0%, 25.1%)
CIE-LAB	lab(39.25, 29.58, -59.66)
CIE-LCH	lch(39.25, 66.59, 296.38°)
OKLab	oklab(48.78% 0.0074 -0.1717)
OKLCH	oklch(48.78% 0.172 272.5)
XYZ	xyz(14.5900, 10.8034, 50.5965)
Luminance	0.1080 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4251BF #BFB042

analogous

#428FBF #4251BF #7142BF

triadic

#4251BF #BF4251 #51BF42

tetradic

#4251BF #BF428F #BFB042 #42BF71

square

#4251BF #BF428F #BFB042 #42BF71

split-complementary

#4251BF #BF7142 #8FBF42

monochromatic

#222A65 #323D92 #4251BF #707BCE #9DA5DE

Accessibility & contrast

On white

6.64

#4251BF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.16

#4251BF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4251BF

6.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4251BF	#FFFFFF	#000000	##FFFFFF
##4251BF	1.00	6.64	3.16	6.64
#FFFFFF	6.64	1.00	21.00	1.00
#000000	3.16	21.00	1.00	21.00
##FFFFFF	6.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0062C3

Deuteranopia (green-blind)

#0057BD

Tritanopia (blue-blind)

#006C80

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #4251bf;
/* rgb */ color: rgb(66, 81, 191);
/* oklch */ color: oklch(48.8% 0.172 272.5);

Tailwind

colors: {
  custom: {
    50: '#8481d3',
    500: '#4251bf',
    950: '#000000',
  },
}

SCSS

$custom: #4251bf;
$custom-light: #8481d3;
$custom-dark: #000000;

JSON

{
  "hex": "#4251bf",
  "rgb": {
    "r": 66,
    "g": 81,
    "b": 191
  },
  "hsl": {
    "h": 232.8,
    "s": 49.407,
    "l": 50.392
  },
  "oklch": {
    "l": 0.48782,
    "c": 0.17183,
    "h": 272.5
  },
  "luminance": 0.10805
}

Semantic roles & 50–950 ramp

primary

#4251BF

secondary

#CAC493

accent

#C84FD9

background

#F8F7FD

surface

#F0EEFA

border

#CBC9D3

text

#0C0A14

muted

#7D7C83

Preview Lab

Preview with #4251BF

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

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