#4273DC#4273DC

#4273DC is a mid, vivid blue. Relative luminance 0.186; OKLCH L 57.7% C 0.169 H 263.3°. Best body text is #000000 at 4.72:1 contrast (WCAG AA passes).

Color values

HEX	#4273DC
RGB	rgb(66, 115, 220)
HSL	hsl(221, 69%, 56%)
HSV	hsv(221, 70%, 86%)
CMYK	cmyk(70%, 47.7%, 0%, 13.7%)
CIE-LAB	lab(50.20, 18.33, -58.61)
CIE-LCH	lch(50.20, 61.41, 287.36°)
OKLab	oklab(57.69% -0.0198 -0.1681)
OKLCH	oklch(57.69% 0.169 263.3)
XYZ	xyz(21.2912, 18.5848, 70.1614)
Luminance	0.1859 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4273DC #DCAB42

analogous

#42C0DC #4273DC #5E42DC

triadic

#4273DC #DC4273 #73DC42

tetradic

#4273DC #DC42C0 #DCAB42 #42DC5E

square

#4273DC #DC42C0 #DCAB42 #42DC5E

split-complementary

#4273DC #DC5E42 #C0DC42

monochromatic

#1A3D8A #2354BE #4273DC #7699E6 #A9BFEF

Accessibility & contrast

On white

4.45

#4273DC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.72

#4273DC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4273DC

4.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4273DC	#FFFFFF	#000000	##000000
##4273DC	1.00	4.45	4.72	4.72
#FFFFFF	4.45	1.00	21.00	21.00
#000000	4.72	21.00	1.00	1.00
##000000	4.72	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#3A7FE0

Deuteranopia (green-blind)

#0E71DA

Tritanopia (blue-blind)

#008C9D

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #4273dc;
/* rgb */ color: rgb(66, 115, 220);
/* oklch */ color: oklch(57.7% 0.169 263.3);

Tailwind

colors: {
  custom: {
    50: '#889ae7',
    500: '#4273dc',
    950: '#000000',
  },
}

SCSS

$custom: #4273dc;
$custom-light: #889ae7;
$custom-dark: #000000;

JSON

{
  "hex": "#4273dc",
  "rgb": {
    "r": 66,
    "g": 115,
    "b": 220
  },
  "hsl": {
    "h": 220.909,
    "s": 68.75,
    "l": 56.078
  },
  "oklch": {
    "l": 0.57691,
    "c": 0.16928,
    "h": 263.3
  },
  "luminance": 0.18587
}

Semantic roles & 50–950 ramp

primary

#4273DC

secondary

#DDC89D

accent

#B43CEC

background

#F9F9FE

surface

#F1F2FD

border

#CBCCD5

text

#0D0E16

muted

#7E7E84

Preview Lab

Preview with #4273DC

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

Preview Lab → · Contrast checker → · Palette generator →