#4273E8#4273E8

#4273E8 is a mid, vivid blue. Relative luminance 0.192; OKLCH L 58.5% C 0.185 H 264.3°. Best body text is #000000 at 4.85:1 contrast (WCAG AA passes).

Color values

HEX	#4273E8
RGB	rgb(66, 115, 232)
HSL	hsl(222, 78%, 58%)
HSV	hsv(222, 72%, 91%)
CMYK	cmyk(71.6%, 50.4%, 0%, 9%)
CIE-LAB	lab(50.97, 22.63, -64.12)
CIE-LCH	lch(50.97, 68.00, 289.44°)
OKLab	oklab(58.53% -0.0184 -0.1843)
OKLCH	oklch(58.53% 0.185 264.3)
XYZ	xyz(22.9378, 19.2435, 78.8338)
Luminance	0.1925 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4273E8 #E8B742

analogous

#42C6E8 #4273E8 #6442E8

triadic

#4273E8 #E84273 #73E842

tetradic

#4273E8 #E842C6 #E8B742 #42E864

square

#4273E8 #E842C6 #E8B742 #42E864

split-complementary

#4273E8 #E86442 #C6E842

monochromatic

#133C9D #1A50D3 #4273E8 #799BEF #AFC4F5

Accessibility & contrast

On white

4.33

#4273E8 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.85

#4273E8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4273E8

4.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4273E8	#FFFFFF	#000000	##000000
##4273E8	1.00	4.33	4.85	4.85
#FFFFFF	4.33	1.00	21.00	21.00
#000000	4.85	21.00	1.00	1.00
##000000	4.85	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A81EC

Deuteranopia (green-blind)

#0072E6

Tritanopia (blue-blind)

#008FA3

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #4273e8;
/* rgb */ color: rgb(66, 115, 232);
/* oklch */ color: oklch(58.5% 0.185 264.3);

Tailwind

colors: {
  custom: {
    50: '#8a9af0',
    500: '#4273e8',
    950: '#000000',
  },
}

SCSS

$custom: #4273e8;
$custom-light: #8a9af0;
$custom-dark: #000000;

JSON

{
  "hex": "#4273e8",
  "rgb": {
    "r": 66,
    "g": 115,
    "b": 232
  },
  "hsl": {
    "h": 222.289,
    "s": 78.302,
    "l": 58.431
  },
  "oklch": {
    "l": 0.58528,
    "c": 0.18524,
    "h": 264.3
  },
  "luminance": 0.19246
}

Semantic roles & 50–950 ramp

primary

#4273E8

secondary

#E4D0A2

accent

#BC33F5

background

#F9F9FE

surface

#F2F2FD

border

#CCCCD5

text

#0D0E17

muted

#7E7E85

Preview Lab

Preview with #4273E8

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

Preview Lab → · Contrast checker → · Palette generator →