#4273CC#4273CC

#4273CC is a mid, vivid blue. Relative luminance 0.178; OKLCH L 56.6% C 0.148 H 261.3°. Best body text is #FFFFFF at 4.61:1 contrast (WCAG AA passes).

Color values

HEX	#4273CC
RGB	rgb(66, 115, 204)
HSL	hsl(219, 58%, 53%)
HSV	hsv(219, 68%, 80%)
CMYK	cmyk(67.6%, 43.6%, 0%, 20%)
CIE-LAB	lab(49.23, 12.60, -51.08)
CIE-LCH	lch(49.23, 52.61, 283.86°)
OKLab	oklab(56.63% -0.0224 -0.146)
OKLCH	oklch(56.63% 0.148 261.3)
XYZ	xyz(19.2727, 17.7774, 59.5307)
Luminance	0.1778 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4273CC #CC9B42

analogous

#42B8CC #4273CC #5642CC

triadic

#4273CC #CC4273 #73CC42

tetradic

#4273CC #CC42B8 #CC9B42 #42CC56

square

#4273CC #CC42B8 #CC9B42 #42CC56

split-complementary

#4273CC #CC5642 #B8CC42

monochromatic

#1F3D74 #2C57A4 #4273CC #7297D9 #A2BAE6

Accessibility & contrast

On white

4.61

#4273CC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.56

#4273CC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #4273CC

4.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4273CC	#FFFFFF	#000000	##FFFFFF
##4273CC	1.00	4.61	4.56	4.61
#FFFFFF	4.61	1.00	21.00	1.00
#000000	4.56	21.00	1.00	21.00
##FFFFFF	4.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#487CCF

Deuteranopia (green-blind)

#306FCA

Tritanopia (blue-blind)

#008895

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #4273cc;
/* rgb */ color: rgb(66, 115, 204);
/* oklch */ color: oklch(56.6% 0.148 261.3);

Tailwind

colors: {
  custom: {
    50: '#859adc',
    500: '#4273cc',
    950: '#000000',
  },
}

SCSS

$custom: #4273cc;
$custom-light: #859adc;
$custom-dark: #000000;

JSON

{
  "hex": "#4273cc",
  "rgb": {
    "r": 66,
    "g": 115,
    "b": 204
  },
  "hsl": {
    "h": 218.696,
    "s": 57.5,
    "l": 52.941
  },
  "oklch": {
    "l": 0.56631,
    "c": 0.14768,
    "h": 261.3
  },
  "luminance": 0.17779
}

Semantic roles & 50–950 ramp

primary

#4273CC

secondary

#D3BE97

accent

#AA47E1

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #4273CC

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

Preview Lab → · Contrast checker → · Palette generator →