#4273C3#4273C3

#4273C3 is a mid, vivid blue. Relative luminance 0.174; OKLCH L 56.1% C 0.135 H 259.7°. Best body text is #FFFFFF at 4.70:1 contrast (WCAG AA passes).

Color values

HEX	#4273C3
RGB	rgb(66, 115, 195)
HSL	hsl(217, 52%, 51%)
HSV	hsv(217, 66%, 76%)
CMYK	cmyk(66.2%, 41%, 0%, 23.5%)
CIE-LAB	lab(48.71, 9.41, -46.75)
CIE-LCH	lch(48.71, 47.69, 281.37°)
OKLab	oklab(56.06% -0.0242 -0.1333)
OKLCH	oklch(56.06% 0.135 259.7)
XYZ	xyz(18.2243, 17.3581, 54.0092)
Luminance	0.1736 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4273C3 #C39242

analogous

#42B3C3 #4273C3 #5142C3

triadic

#4273C3 #C34273 #73C342

tetradic

#4273C3 #C342B3 #C39242 #42C351

square

#4273C3 #C342B3 #C39242 #42C351

split-complementary

#4273C3 #C35142 #B3C342

monochromatic

#213D69 #305798 #4273C3 #7095D2 #9FB8E0

Accessibility & contrast

On white

4.70

#4273C3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.47

#4273C3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4273C3

4.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4273C3	#FFFFFF	#000000	##FFFFFF
##4273C3	1.00	4.70	4.47	4.70
#FFFFFF	4.70	1.00	21.00	1.00
#000000	4.47	21.00	1.00	21.00
##FFFFFF	4.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4E7AC6

Deuteranopia (green-blind)

#3B6EC1

Tritanopia (blue-blind)

#008591

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #4273c3;
/* rgb */ color: rgb(66, 115, 195);
/* oklch */ color: oklch(56.1% 0.135 259.7);

Tailwind

colors: {
  custom: {
    50: '#839ad5',
    500: '#4273c3',
    950: '#000000',
  },
}

SCSS

$custom: #4273c3;
$custom-light: #839ad5;
$custom-dark: #000000;

JSON

{
  "hex": "#4273c3",
  "rgb": {
    "r": 66,
    "g": 115,
    "b": 195
  },
  "hsl": {
    "h": 217.209,
    "s": 51.807,
    "l": 51.176
  },
  "oklch": {
    "l": 0.56064,
    "c": 0.13543,
    "h": 259.7
  },
  "luminance": 0.1736
}

Semantic roles & 50–950 ramp

primary

#4273C3

secondary

#CDB794

accent

#A54DDB

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0C0E14

muted

#7D7E83

Preview Lab

Preview with #4273C3

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

Preview Lab → · Contrast checker → · Palette generator →