#4251BC#4251BC

#4251BC is a mid, vivid blue. Relative luminance 0.107; OKLCH L 48.5% C 0.168 H 272.5°. Best body text is #FFFFFF at 6.70:1 contrast (WCAG AA passes).

Color values

HEX	#4251BC
RGB	rgb(66, 81, 188)
HSL	hsl(233, 48%, 50%)
HSV	hsv(233, 65%, 74%)
CMYK	cmyk(64.9%, 56.9%, 0%, 26.3%)
CIE-LAB	lab(39.02, 28.53, -58.27)
CIE-LCH	lch(39.02, 64.88, 296.09°)
OKLab	oklab(48.55% 0.0073 -0.1676)
OKLCH	oklch(48.55% 0.168 272.5)
XYZ	xyz(14.2633, 10.6727, 48.8756)
Luminance	0.1067 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4251BC #BCAD42

analogous

#428EBC #4251BC #7042BC

triadic

#4251BC #BC4251 #51BC42

tetradic

#4251BC #BC428E #BCAD42 #42BC70

square

#4251BC #BC428E #BCAD42 #42BC70

split-complementary

#4251BC #BC7042 #8EBC42

monochromatic

#222A61 #323D8F #4251BC #6F7ACC #9CA4DC

Accessibility & contrast

On white

6.70

#4251BC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.13

#4251BC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4251BC

6.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4251BC	#FFFFFF	#000000	##FFFFFF
##4251BC	1.00	6.70	3.13	6.70
#FFFFFF	6.70	1.00	21.00	1.00
#000000	3.13	21.00	1.00	21.00
##FFFFFF	6.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0061C0

Deuteranopia (green-blind)

#0057BA

Tritanopia (blue-blind)

#006B7E

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #4251bc;
/* rgb */ color: rgb(66, 81, 188);
/* oklch */ color: oklch(48.5% 0.168 272.5);

Tailwind

colors: {
  custom: {
    50: '#8481d1',
    500: '#4251bc',
    950: '#000000',
  },
}

SCSS

$custom: #4251bc;
$custom-light: #8481d1;
$custom-dark: #000000;

JSON

{
  "hex": "#4251bc",
  "rgb": {
    "r": 66,
    "g": 81,
    "b": 188
  },
  "hsl": {
    "h": 232.623,
    "s": 48.031,
    "l": 49.804
  },
  "oklch": {
    "l": 0.48545,
    "c": 0.16774,
    "h": 272.5
  },
  "luminance": 0.10674
}

Semantic roles & 50–950 ramp

primary

#4251BC

secondary

#C9C291

accent

#C750D8

background

#F8F7FC

surface

#F0EEF9

border

#CBC9D2

text

#0C0A14

muted

#7D7C82

Preview Lab

Preview with #4251BC

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

Preview Lab → · Contrast checker → · Palette generator →