#4251CE#4251CE

#4251CE is a mid, vivid blue. Relative luminance 0.115; OKLCH L 50.0% C 0.192 H 272.2°. Best body text is #FFFFFF at 6.36:1 contrast (WCAG AA passes).

Color values

HEX	#4251CE
RGB	rgb(66, 81, 206)
HSL	hsl(234, 59%, 53%)
HSV	hsv(234, 68%, 81%)
CMYK	cmyk(68%, 60.7%, 0%, 19.2%)
CIE-LAB	lab(40.41, 34.81, -66.48)
CIE-LCH	lch(40.41, 75.04, 297.64°)
OKLab	oklab(50.01% 0.0073 -0.1917)
OKLCH	oklch(50.01% 0.192 272.2)
XYZ	xyz(16.3260, 11.4978, 59.7395)
Luminance	0.1150 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4251CE #CEBF42

analogous

#4297CE #4251CE #7942CE

triadic

#4251CE #CE4251 #51CE42

tetradic

#4251CE #CE4297 #CEBF42 #42CE79

square

#4251CE #CE4297 #CEBF42 #42CE79

split-complementary

#4251CE #CE7942 #97CE42

monochromatic

#1F2877 #2B39A7 #4251CE #737EDB #A3AAE7

Accessibility & contrast

On white

6.36

#4251CE on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.30

#4251CE on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4251CE

6.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4251CE	#FFFFFF	#000000	##FFFFFF
##4251CE	1.00	6.36	3.30	6.36
#FFFFFF	6.36	1.00	21.00	1.00
#000000	3.30	21.00	1.00	21.00
##FFFFFF	6.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0066D2

Deuteranopia (green-blind)

#0059CC

Tritanopia (blue-blind)

#007088

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #4251ce;
/* rgb */ color: rgb(66, 81, 206);
/* oklch */ color: oklch(50.0% 0.192 272.2);

Tailwind

colors: {
  custom: {
    50: '#8781de',
    500: '#4251ce',
    950: '#000000',
  },
}

SCSS

$custom: #4251ce;
$custom-light: #8781de;
$custom-dark: #000000;

JSON

{
  "hex": "#4251ce",
  "rgb": {
    "r": 66,
    "g": 81,
    "b": 206
  },
  "hsl": {
    "h": 233.571,
    "s": 58.824,
    "l": 53.333
  },
  "oklch": {
    "l": 0.50005,
    "c": 0.19185,
    "h": 272.2
  },
  "luminance": 0.11499
}

Semantic roles & 50–950 ramp

primary

#4251CE

secondary

#D4CE98

accent

#D146E2

background

#F9F7FD

surface

#F1EEFB

border

#CBC9D4

text

#0D0A15

muted

#7E7C83

Preview Lab

Preview with #4251CE

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

Preview Lab → · Contrast checker → · Palette generator →