#4251DA#4251DA

#4251DA is a mid, highly saturated blue. Relative luminance 0.121; OKLCH L 51.0% C 0.207 H 271.9°. Best body text is #FFFFFF at 6.14:1 contrast (WCAG AA passes).

Color values

HEX	#4251DA
RGB	rgb(66, 81, 218)
HSL	hsl(234, 67%, 56%)
HSV	hsv(234, 70%, 85%)
CMYK	cmyk(69.7%, 62.8%, 0%, 14.5%)
CIE-LAB	lab(41.38, 38.95, -71.78)
CIE-LCH	lch(41.38, 81.67, 298.49°)
OKLab	oklab(51.02% 0.0069 -0.2073)
OKLCH	oklch(51.02% 0.207 271.9)
XYZ	xyz(17.8398, 12.1033, 67.7121)
Luminance	0.1211 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4251DA #DACB42

analogous

#429DDA #4251DA #7F42DA

triadic

#4251DA #DA4251 #51DA42

tetradic

#4251DA #DA429D #DACB42 #42DA7F

square

#4251DA #DA429D #DACB42 #42DA7F

split-complementary

#4251DA #DA7F42 #9DDA42

monochromatic

#1A2587 #2433BA #4251DA #7580E4 #A8AFEE

Accessibility & contrast

On white

6.14

#4251DA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.42

#4251DA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4251DA

6.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4251DA	#FFFFFF	#000000	##FFFFFF
##4251DA	1.00	6.14	3.42	6.14
#FFFFFF	6.14	1.00	21.00	1.00
#000000	3.42	21.00	1.00	21.00
##FFFFFF	6.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0069DE

Deuteranopia (green-blind)

#005BD7

Tritanopia (blue-blind)

#00748E

Achromatopsia (no color)

#626262

Design tokens & code

CSS

--color: #4251da;
/* rgb */ color: rgb(66, 81, 218);
/* oklch */ color: oklch(51.0% 0.207 271.9);

Tailwind

colors: {
  custom: {
    50: '#8a82e7',
    500: '#4251da',
    950: '#000000',
  },
}

SCSS

$custom: #4251da;
$custom-light: #8a82e7;
$custom-dark: #000000;

JSON

{
  "hex": "#4251da",
  "rgb": {
    "r": 66,
    "g": 81,
    "b": 218
  },
  "hsl": {
    "h": 234.079,
    "s": 67.257,
    "l": 55.686
  },
  "oklch": {
    "l": 0.51024,
    "c": 0.20738,
    "h": 271.9
  },
  "luminance": 0.12105
}

Semantic roles & 50–950 ramp

primary

#4251DA

secondary

#DBD59C

accent

#D93EEA

background

#F9F7FE

surface

#F1EEFD

border

#CBC9D5

text

#0D0A16

muted

#7E7C84

Preview Lab

Preview with #4251DA

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

Preview Lab → · Contrast checker → · Palette generator →