#4251D8#4251D8

#4251D8 is a mid, highly saturated blue. Relative luminance 0.120; OKLCH L 50.9% C 0.205 H 272.0°. Best body text is #FFFFFF at 6.18:1 contrast (WCAG AA passes).

Color values

HEX	#4251D8
RGB	rgb(66, 81, 216)
HSL	hsl(234, 66%, 55%)
HSV	hsv(234, 69%, 85%)
CMYK	cmyk(69.4%, 62.5%, 0%, 15.3%)
CIE-LAB	lab(41.22, 38.26, -70.91)
CIE-LCH	lch(41.22, 80.57, 298.35°)
OKLab	oklab(50.85% 0.007 -0.2047)
OKLCH	oklch(50.85% 0.205 272)
XYZ	xyz(17.5797, 11.9993, 66.3421)
Luminance	0.1200 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4251D8 #D8C942

analogous

#429CD8 #4251D8 #7E42D8

triadic

#4251D8 #D84251 #51D842

tetradic

#4251D8 #D8429C #D8C942 #42D87E

square

#4251D8 #D8429C #D8C942 #42D87E

split-complementary

#4251D8 #D87E42 #9CD842

monochromatic

#1B2684 #2634B7 #4251D8 #7580E2 #A7AEED

Accessibility & contrast

On white

6.18

#4251D8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.40

#4251D8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4251D8

6.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4251D8	#FFFFFF	#000000	##FFFFFF
##4251D8	1.00	6.18	3.40	6.18
#FFFFFF	6.18	1.00	21.00	1.00
#000000	3.40	21.00	1.00	21.00
##FFFFFF	6.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0068DC

Deuteranopia (green-blind)

#005AD5

Tritanopia (blue-blind)

#00748D

Achromatopsia (no color)

#616161

Design tokens & code

CSS

--color: #4251d8;
/* rgb */ color: rgb(66, 81, 216);
/* oklch */ color: oklch(50.9% 0.205 272.0);

Tailwind

colors: {
  custom: {
    50: '#8982e5',
    500: '#4251d8',
    950: '#000000',
  },
}

SCSS

$custom: #4251d8;
$custom-light: #8982e5;
$custom-dark: #000000;

JSON

{
  "hex": "#4251d8",
  "rgb": {
    "r": 66,
    "g": 81,
    "b": 216
  },
  "hsl": {
    "h": 234,
    "s": 65.789,
    "l": 55.294
  },
  "oklch": {
    "l": 0.50852,
    "c": 0.20483,
    "h": 272
  },
  "luminance": 0.12001
}

Semantic roles & 50–950 ramp

primary

#4251D8

secondary

#DAD49C

accent

#D83FE9

background

#F9F7FE

surface

#F1EEFC

border

#CBC9D5

text

#0D0A16

muted

#7E7C84

Preview Lab

Preview with #4251D8

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

Preview Lab → · Contrast checker → · Palette generator →