#4273BC#4273BC

#4273BC is a mid, vivid blue. Relative luminance 0.171; OKLCH L 55.6% C 0.126 H 258.2°. Best body text is #FFFFFF at 4.76:1 contrast (WCAG AA passes).

Color values

HEX	#4273BC
RGB	rgb(66, 115, 188)
HSL	hsl(216, 48%, 50%)
HSV	hsv(216, 65%, 74%)
CMYK	cmyk(64.9%, 38.8%, 0%, 26.3%)
CIE-LAB	lab(48.32, 6.94, -43.34)
CIE-LCH	lch(48.32, 43.89, 279.09°)
OKLab	oklab(55.64% -0.0257 -0.1232)
OKLCH	oklch(55.64% 0.126 258.2)
XYZ	xyz(17.4514, 17.0489, 49.9383)
Luminance	0.1705 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4273BC #BC8B42

analogous

#42B0BC #4273BC #4E42BC

triadic

#4273BC #BC4273 #73BC42

tetradic

#4273BC #BC42B0 #BC8B42 #42BC4E

square

#4273BC #BC42B0 #BC8B42 #42BC4E

split-complementary

#4273BC #BC4E42 #B0BC42

monochromatic

#223C61 #32578F #4273BC #6F94CC #9CB6DC

Accessibility & contrast

On white

4.76

#4273BC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.41

#4273BC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4273BC

4.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4273BC	#FFFFFF	#000000	##FFFFFF
##4273BC	1.00	4.76	4.41	4.76
#FFFFFF	4.76	1.00	21.00	1.00
#000000	4.41	21.00	1.00	21.00
##FFFFFF	4.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5379BF

Deuteranopia (green-blind)

#416DBA

Tritanopia (blue-blind)

#00848E

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #4273bc;
/* rgb */ color: rgb(66, 115, 188);
/* oklch */ color: oklch(55.6% 0.126 258.2);

Tailwind

colors: {
  custom: {
    50: '#829ad0',
    500: '#4273bc',
    950: '#000000',
  },
}

SCSS

$custom: #4273bc;
$custom-light: #829ad0;
$custom-dark: #000000;

JSON

{
  "hex": "#4273bc",
  "rgb": {
    "r": 66,
    "g": 115,
    "b": 188
  },
  "hsl": {
    "h": 215.902,
    "s": 48.031,
    "l": 49.804
  },
  "oklch": {
    "l": 0.55638,
    "c": 0.1259,
    "h": 258.2
  },
  "luminance": 0.17051
}

Semantic roles & 50–950 ramp

primary

#4273BC

secondary

#C9B291

accent

#A150D8

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #4273BC

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

Preview Lab → · Contrast checker → · Palette generator →