#4251CC#4251CC

#4251CC is a mid, vivid blue. Relative luminance 0.114; OKLCH L 49.8% C 0.189 H 272.2°. Best body text is #FFFFFF at 6.40:1 contrast (WCAG AA passes).

Color values

HEX	#4251CC
RGB	rgb(66, 81, 204)
HSL	hsl(233, 58%, 53%)
HSV	hsv(233, 68%, 80%)
CMYK	cmyk(67.6%, 60.3%, 0%, 20%)
CIE-LAB	lab(40.25, 34.11, -65.58)
CIE-LCH	lch(40.25, 73.92, 297.48°)
OKLab	oklab(49.84% 0.0074 -0.1891)
OKLCH	oklch(49.84% 0.189 272.2)
XYZ	xyz(16.0846, 11.4012, 58.4680)
Luminance	0.1140 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4251CC #CCBD42

analogous

#4296CC #4251CC #7842CC

triadic

#4251CC #CC4251 #51CC42

tetradic

#4251CC #CC4296 #CCBD42 #42CC78

square

#4251CC #CC4296 #CCBD42 #42CC78

split-complementary

#4251CC #CC7842 #96CC42

monochromatic

#1F2974 #2C39A4 #4251CC #727DD9 #A2AAE6

Accessibility & contrast

On white

6.40

#4251CC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.28

#4251CC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4251CC

6.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4251CC	#FFFFFF	#000000	##FFFFFF
##4251CC	1.00	6.40	3.28	6.40
#FFFFFF	6.40	1.00	21.00	1.00
#000000	3.28	21.00	1.00	21.00
##FFFFFF	6.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0065D0

Deuteranopia (green-blind)

#0059CA

Tritanopia (blue-blind)

#007087

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #4251cc;
/* rgb */ color: rgb(66, 81, 204);
/* oklch */ color: oklch(49.8% 0.189 272.2);

Tailwind

colors: {
  custom: {
    50: '#8781dc',
    500: '#4251cc',
    950: '#000000',
  },
}

SCSS

$custom: #4251cc;
$custom-light: #8781dc;
$custom-dark: #000000;

JSON

{
  "hex": "#4251cc",
  "rgb": {
    "r": 66,
    "g": 81,
    "b": 204
  },
  "hsl": {
    "h": 233.478,
    "s": 57.5,
    "l": 52.941
  },
  "oklch": {
    "l": 0.49839,
    "c": 0.18922,
    "h": 272.2
  },
  "luminance": 0.11403
}

Semantic roles & 50–950 ramp

primary

#4251CC

secondary

#D3CC97

accent

#D047E1

background

#F8F7FD

surface

#F0EEFB

border

#CBC9D4

text

#0D0A15

muted

#7D7C83

Preview Lab

Preview with #4251CC

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

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