#4273BF#4273BF

#4273BF is a mid, vivid blue. Relative luminance 0.172; OKLCH L 55.8% C 0.130 H 258.9°. Best body text is #FFFFFF at 4.73:1 contrast (WCAG AA passes).

Color values

HEX	#4273BF
RGB	rgb(66, 115, 191)
HSL	hsl(216, 49%, 50%)
HSV	hsv(216, 65%, 75%)
CMYK	cmyk(65.4%, 39.8%, 0%, 25.1%)
CIE-LAB	lab(48.49, 7.99, -44.81)
CIE-LCH	lch(48.49, 45.51, 280.11°)
OKLab	oklab(55.82% -0.025 -0.1275)
OKLCH	oklch(55.82% 0.13 258.9)
XYZ	xyz(17.7781, 17.1796, 51.6592)
Luminance	0.1718 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4273BF #BF8E42

analogous

#42B1BF #4273BF #4F42BF

triadic

#4273BF #BF4273 #73BF42

tetradic

#4273BF #BF42B1 #BF8E42 #42BF4F

square

#4273BF #BF42B1 #BF8E42 #42BF4F

split-complementary

#4273BF #BF4F42 #B1BF42

monochromatic

#223C65 #325792 #4273BF #7095CE #9DB7DE

Accessibility & contrast

On white

4.73

#4273BF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.44

#4273BF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4273BF

4.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4273BF	#FFFFFF	#000000	##FFFFFF
##4273BF	1.00	4.73	4.44	4.73
#FFFFFF	4.73	1.00	21.00	1.00
#000000	4.44	21.00	1.00	21.00
##FFFFFF	4.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5179C2

Deuteranopia (green-blind)

#3E6EBD

Tritanopia (blue-blind)

#008490

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #4273bf;
/* rgb */ color: rgb(66, 115, 191);
/* oklch */ color: oklch(55.8% 0.130 258.9);

Tailwind

colors: {
  custom: {
    50: '#839ad3',
    500: '#4273bf',
    950: '#000000',
  },
}

SCSS

$custom: #4273bf;
$custom-light: #839ad3;
$custom-dark: #000000;

JSON

{
  "hex": "#4273bf",
  "rgb": {
    "r": 66,
    "g": 115,
    "b": 191
  },
  "hsl": {
    "h": 216.48,
    "s": 49.407,
    "l": 50.392
  },
  "oklch": {
    "l": 0.55819,
    "c": 0.12998,
    "h": 258.9
  },
  "luminance": 0.17181
}

Semantic roles & 50–950 ramp

primary

#4273BF

secondary

#CAB493

accent

#A34FD9

background

#F8F9FD

surface

#F0F2FA

border

#CBCCD3

text

#0C0E14

muted

#7D7E83

Preview Lab

Preview with #4273BF

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

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