#4273BE#4273BE

#4273BE is a mid, vivid blue. Relative luminance 0.171; OKLCH L 55.8% C 0.129 H 258.7°. Best body text is #FFFFFF at 4.74:1 contrast (WCAG AA passes).

Color values

HEX	#4273BE
RGB	rgb(66, 115, 190)
HSL	hsl(216, 49%, 50%)
HSV	hsv(216, 65%, 75%)
CMYK	cmyk(65.3%, 39.5%, 0%, 25.5%)
CIE-LAB	lab(48.43, 7.64, -44.32)
CIE-LCH	lch(48.43, 44.97, 279.78°)
OKLab	oklab(55.76% -0.0253 -0.1261)
OKLCH	oklch(55.76% 0.129 258.7)
XYZ	xyz(17.6684, 17.1357, 51.0816)
Luminance	0.1714 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4273BE #BE8D42

analogous

#42B1BE #4273BE #4F42BE

triadic

#4273BE #BE4273 #73BE42

tetradic

#4273BE #BE42B1 #BE8D42 #42BE4F

square

#4273BE #BE42B1 #BE8D42 #42BE4F

split-complementary

#4273BE #BE4F42 #B1BE42

monochromatic

#223C63 #325791 #4273BE #7095CE #9DB6DD

Accessibility & contrast

On white

4.74

#4273BE on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.43

#4273BE on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4273BE

4.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4273BE	#FFFFFF	#000000	##FFFFFF
##4273BE	1.00	4.74	4.43	4.74
#FFFFFF	4.74	1.00	21.00	1.00
#000000	4.43	21.00	1.00	21.00
##FFFFFF	4.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5179C1

Deuteranopia (green-blind)

#3F6EBC

Tritanopia (blue-blind)

#00848F

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #4273be;
/* rgb */ color: rgb(66, 115, 190);
/* oklch */ color: oklch(55.8% 0.129 258.7);

Tailwind

colors: {
  custom: {
    50: '#839ad2',
    500: '#4273be',
    950: '#000000',
  },
}

SCSS

$custom: #4273be;
$custom-light: #839ad2;
$custom-dark: #000000;

JSON

{
  "hex": "#4273be",
  "rgb": {
    "r": 66,
    "g": 115,
    "b": 190
  },
  "hsl": {
    "h": 216.29,
    "s": 48.819,
    "l": 50.196
  },
  "oklch": {
    "l": 0.55758,
    "c": 0.12862,
    "h": 258.7
  },
  "luminance": 0.17137
}

Semantic roles & 50–950 ramp

primary

#4273BE

secondary

#CAB492

accent

#A24FD8

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0C0E14

muted

#7D7E82

Preview Lab

Preview with #4273BE

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

Preview Lab → · Contrast checker → · Palette generator →