#4251BA#4251BA

#4251BA is a mid, vivid blue. Relative luminance 0.106; OKLCH L 48.4% C 0.165 H 272.5°. Best body text is #FFFFFF at 6.74:1 contrast (WCAG AA passes).

Color values

HEX	#4251BA
RGB	rgb(66, 81, 186)
HSL	hsl(233, 48%, 49%)
HSV	hsv(233, 65%, 73%)
CMYK	cmyk(64.5%, 56.5%, 0%, 27.1%)
CIE-LAB	lab(38.88, 27.83, -57.33)
CIE-LCH	lch(38.88, 63.73, 295.89°)
OKLab	oklab(48.39% 0.0073 -0.1648)
OKLCH	oklch(48.39% 0.165 272.5)
XYZ	xyz(14.0492, 10.5871, 47.7480)
Luminance	0.1059 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4251BA #BAAB42

analogous

#428DBA #4251BA #6F42BA

triadic

#4251BA #BA4251 #51BA42

tetradic

#4251BA #BA428D #BAAB42 #42BA6F

square

#4251BA #BA428D #BAAB42 #42BA6F

split-complementary

#4251BA #BA6F42 #8DBA42

monochromatic

#222A60 #323D8D #4251BA #6E79CB #9BA3DB

Accessibility & contrast

On white

6.74

#4251BA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.12

#4251BA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4251BA

6.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4251BA	#FFFFFF	#000000	##FFFFFF
##4251BA	1.00	6.74	3.12	6.74
#FFFFFF	6.74	1.00	21.00	1.00
#000000	3.12	21.00	1.00	21.00
##FFFFFF	6.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0061BE

Deuteranopia (green-blind)

#0056B8

Tritanopia (blue-blind)

#006A7D

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #4251ba;
/* rgb */ color: rgb(66, 81, 186);
/* oklch */ color: oklch(48.4% 0.165 272.5);

Tailwind

colors: {
  custom: {
    50: '#8381cf',
    500: '#4251ba',
    950: '#000000',
  },
}

SCSS

$custom: #4251ba;
$custom-light: #8381cf;
$custom-dark: #000000;

JSON

{
  "hex": "#4251ba",
  "rgb": {
    "r": 66,
    "g": 81,
    "b": 186
  },
  "hsl": {
    "h": 232.5,
    "s": 47.619,
    "l": 49.412
  },
  "oklch": {
    "l": 0.48388,
    "c": 0.165,
    "h": 272.5
  },
  "luminance": 0.10588
}

Semantic roles & 50–950 ramp

primary

#4251BA

secondary

#C8C190

accent

#C651D7

background

#F8F7FC

surface

#F0EEF9

border

#CBC9D2

text

#0C0A14

muted

#7D7C82

Preview Lab

Preview with #4251BA

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

Preview Lab → · Contrast checker → · Palette generator →