#4251C8#4251C8

#4251C8 is a mid, vivid blue. Relative luminance 0.112; OKLCH L 49.5% C 0.184 H 272.3°. Best body text is #FFFFFF at 6.48:1 contrast (WCAG AA passes).

Color values

HEX	#4251C8
RGB	rgb(66, 81, 200)
HSL	hsl(233, 55%, 52%)
HSV	hsv(233, 67%, 78%)
CMYK	cmyk(67%, 59.5%, 0%, 21.6%)
CIE-LAB	lab(39.93, 32.72, -63.78)
CIE-LCH	lch(39.93, 71.68, 297.16°)
OKLab	oklab(49.51% 0.0074 -0.1838)
OKLCH	oklch(49.51% 0.184 272.3)
XYZ	xyz(15.6110, 11.2118, 55.9738)
Luminance	0.1121 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4251C8 #C8B942

analogous

#4294C8 #4251C8 #7642C8

triadic

#4251C8 #C84251 #51C842

tetradic

#4251C8 #C84294 #C8B942 #42C876

square

#4251C8 #C84294 #C8B942 #42C876

split-complementary

#4251C8 #C87642 #94C842

monochromatic

#20296F #2E3B9F #4251C8 #717DD6 #A1A8E4

Accessibility & contrast

On white

6.48

#4251C8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.24

#4251C8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4251C8

6.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4251C8	#FFFFFF	#000000	##FFFFFF
##4251C8	1.00	6.48	3.24	6.48
#FFFFFF	6.48	1.00	21.00	1.00
#000000	3.24	21.00	1.00	21.00
##FFFFFF	6.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0064CC

Deuteranopia (green-blind)

#0058C6

Tritanopia (blue-blind)

#006F85

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #4251c8;
/* rgb */ color: rgb(66, 81, 200);
/* oklch */ color: oklch(49.5% 0.184 272.3);

Tailwind

colors: {
  custom: {
    50: '#8681da',
    500: '#4251c8',
    950: '#000000',
  },
}

SCSS

$custom: #4251c8;
$custom-light: #8681da;
$custom-dark: #000000;

JSON

{
  "hex": "#4251c8",
  "rgb": {
    "r": 66,
    "g": 81,
    "b": 200
  },
  "hsl": {
    "h": 233.284,
    "s": 54.918,
    "l": 52.157
  },
  "oklch": {
    "l": 0.49509,
    "c": 0.18393,
    "h": 272.3
  },
  "luminance": 0.11213
}

Semantic roles & 50–950 ramp

primary

#4251C8

secondary

#D0CA96

accent

#CE4ADE

background

#F8F7FD

surface

#F0EEFB

border

#CBC9D4

text

#0C0A15

muted

#7D7C83

Preview Lab

Preview with #4251C8

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

Preview Lab → · Contrast checker → · Palette generator →