#4273CF#4273CF

#4273CF is a mid, vivid blue. Relative luminance 0.179; OKLCH L 56.8% C 0.152 H 261.7°. Best body text is #000000 at 4.59:1 contrast (WCAG AA passes).

Color values

HEX	#4273CF
RGB	rgb(66, 115, 207)
HSL	hsl(219, 59%, 54%)
HSV	hsv(219, 68%, 81%)
CMYK	cmyk(68.1%, 44.4%, 0%, 18.8%)
CIE-LAB	lab(49.40, 13.67, -52.51)
CIE-LCH	lch(49.40, 54.26, 284.60°)
OKLab	oklab(56.83% -0.0219 -0.1502)
OKLCH	oklch(56.83% 0.152 261.7)
XYZ	xyz(19.6360, 17.9227, 61.4440)
Luminance	0.1792 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4273CF #CF9E42

analogous

#42B9CF #4273CF #5742CF

triadic

#4273CF #CF4273 #73CF42

tetradic

#4273CF #CF42B9 #CF9E42 #42CF57

square

#4273CF #CF42B9 #CF9E42 #42CF57

split-complementary

#4273CF #CF5742 #B9CF42

monochromatic

#1F3E78 #2B57A9 #4273CF #7397DB #A4BBE8

Accessibility & contrast

On white

4.58

#4273CF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.59

#4273CF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4273CF

4.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4273CF	#FFFFFF	#000000	##000000
##4273CF	1.00	4.58	4.59	4.59
#FFFFFF	4.58	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)

#467CD3

Deuteranopia (green-blind)

#2C6FCD

Tritanopia (blue-blind)

#008897

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #4273cf;
/* rgb */ color: rgb(66, 115, 207);
/* oklch */ color: oklch(56.8% 0.152 261.7);

Tailwind

colors: {
  custom: {
    50: '#869ade',
    500: '#4273cf',
    950: '#000000',
  },
}

SCSS

$custom: #4273cf;
$custom-light: #869ade;
$custom-dark: #000000;

JSON

{
  "hex": "#4273cf",
  "rgb": {
    "r": 66,
    "g": 115,
    "b": 207
  },
  "hsl": {
    "h": 219.149,
    "s": 59.494,
    "l": 53.529
  },
  "oklch": {
    "l": 0.56825,
    "c": 0.15175,
    "h": 261.7
  },
  "luminance": 0.17925
}

Semantic roles & 50–950 ramp

primary

#4273CF

secondary

#D5C098

accent

#AC45E3

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #4273CF

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

Preview Lab → · Contrast checker → · Palette generator →