#4251CA#4251CA

#4251CA is a mid, vivid blue. Relative luminance 0.113; OKLCH L 49.7% C 0.187 H 272.3°. Best body text is #FFFFFF at 6.44:1 contrast (WCAG AA passes).

Color values

HEX	#4251CA
RGB	rgb(66, 81, 202)
HSL	hsl(233, 56%, 53%)
HSV	hsv(233, 67%, 79%)
CMYK	cmyk(67.3%, 59.9%, 0%, 20.8%)
CIE-LAB	lab(40.09, 33.42, -64.68)
CIE-LCH	lch(40.09, 72.80, 297.32°)
OKLab	oklab(49.67% 0.0074 -0.1864)
OKLCH	oklch(49.67% 0.187 272.3)
XYZ	xyz(15.8463, 11.3059, 57.2128)
Luminance	0.1131 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4251CA #CABB42

analogous

#4295CA #4251CA #7742CA

triadic

#4251CA #CA4251 #51CA42

tetradic

#4251CA #CA4295 #CABB42 #42CA77

square

#4251CA #CA4295 #CABB42 #42CA77

split-complementary

#4251CA #CA7742 #95CA42

monochromatic

#202972 #2D3AA2 #4251CA #727DD7 #A2A9E5

Accessibility & contrast

On white

6.44

#4251CA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.26

#4251CA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4251CA

6.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4251CA	#FFFFFF	#000000	##FFFFFF
##4251CA	1.00	6.44	3.26	6.44
#FFFFFF	6.44	1.00	21.00	1.00
#000000	3.26	21.00	1.00	21.00
##FFFFFF	6.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0065CE

Deuteranopia (green-blind)

#0058C8

Tritanopia (blue-blind)

#006F86

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #4251ca;
/* rgb */ color: rgb(66, 81, 202);
/* oklch */ color: oklch(49.7% 0.187 272.3);

Tailwind

colors: {
  custom: {
    50: '#8681db',
    500: '#4251ca',
    950: '#000000',
  },
}

SCSS

$custom: #4251ca;
$custom-light: #8681db;
$custom-dark: #000000;

JSON

{
  "hex": "#4251ca",
  "rgb": {
    "r": 66,
    "g": 81,
    "b": 202
  },
  "hsl": {
    "h": 233.382,
    "s": 56.198,
    "l": 52.549
  },
  "oklch": {
    "l": 0.49673,
    "c": 0.18659,
    "h": 272.3
  },
  "luminance": 0.11307
}

Semantic roles & 50–950 ramp

primary

#4251CA

secondary

#D1CB96

accent

#CF48DF

background

#F8F7FD

surface

#F0EEFB

border

#CBC9D4

text

#0D0A15

muted

#7D7C83

Preview Lab

Preview with #4251CA

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

Preview Lab → · Contrast checker → · Palette generator →