#4273D0#4273D0

#4273D0 is a mid, vivid blue. Relative luminance 0.180; OKLCH L 56.9% C 0.153 H 261.9°. Best body text is #000000 at 4.59:1 contrast (WCAG AA passes).

Color values

HEX	#4273D0
RGB	rgb(66, 115, 208)
HSL	hsl(219, 60%, 54%)
HSV	hsv(219, 68%, 82%)
CMYK	cmyk(68.3%, 44.7%, 0%, 18.4%)
CIE-LAB	lab(49.46, 14.03, -52.99)
CIE-LCH	lch(49.46, 54.81, 284.83°)
OKLab	oklab(56.89% -0.0217 -0.1516)
OKLCH	oklch(56.89% 0.153 261.9)
XYZ	xyz(19.7586, 17.9718, 62.0899)
Luminance	0.1797 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4273D0 #D09F42

analogous

#42BAD0 #4273D0 #5842D0

triadic

#4273D0 #D04273 #73D042

tetradic

#4273D0 #D042BA #D09F42 #42D058

square

#4273D0 #D042BA #D09F42 #42D058

split-complementary

#4273D0 #D05842 #BAD042

monochromatic

#1E3E79 #2A57AA #4273D0 #7397DC #A4BCE8

Accessibility & contrast

On white

4.57

#4273D0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.59

#4273D0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4273D0

4.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4273D0	#FFFFFF	#000000	##000000
##4273D0	1.00	4.57	4.59	4.59
#FFFFFF	4.57	1.00	21.00	21.00
#000000	4.59	21.00	1.00	1.00
##000000	4.59	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#457DD4

Deuteranopia (green-blind)

#2B6FCE

Tritanopia (blue-blind)

#008997

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #4273d0;
/* rgb */ color: rgb(66, 115, 208);
/* oklch */ color: oklch(56.9% 0.153 261.9);

Tailwind

colors: {
  custom: {
    50: '#869adf',
    500: '#4273d0',
    950: '#000000',
  },
}

SCSS

$custom: #4273d0;
$custom-light: #869adf;
$custom-dark: #000000;

JSON

{
  "hex": "#4273d0",
  "rgb": {
    "r": 66,
    "g": 115,
    "b": 208
  },
  "hsl": {
    "h": 219.296,
    "s": 60.169,
    "l": 53.725
  },
  "oklch": {
    "l": 0.5689,
    "c": 0.1531,
    "h": 261.9
  },
  "luminance": 0.17974
}

Semantic roles & 50–950 ramp

primary

#4273D0

secondary

#D5C099

accent

#AD44E3

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #4273D0

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

Preview Lab → · Contrast checker → · Palette generator →