#4273BA#4273BA

#4273BA is a mid, vivid blue. Relative luminance 0.170; OKLCH L 55.5% C 0.123 H 257.7°. Best body text is #FFFFFF at 4.78:1 contrast (WCAG AA passes).

Color values

HEX	#4273BA
RGB	rgb(66, 115, 186)
HSL	hsl(216, 48%, 49%)
HSV	hsv(216, 65%, 73%)
CMYK	cmyk(64.5%, 38.2%, 0%, 27.1%)
CIE-LAB	lab(48.21, 6.23, -42.35)
CIE-LCH	lch(48.21, 42.81, 278.37°)
OKLab	oklab(55.52% -0.0262 -0.1204)
OKLCH	oklch(55.52% 0.123 257.7)
XYZ	xyz(17.2373, 16.9632, 48.8107)
Luminance	0.1696 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4273BA #BA8942

analogous

#42AFBA #4273BA #4D42BA

triadic

#4273BA #BA4273 #73BA42

tetradic

#4273BA #BA42AF #BA8942 #42BA4D

square

#4273BA #BA42AF #BA8942 #42BA4D

split-complementary

#4273BA #BA4D42 #AFBA42

monochromatic

#223B60 #32578D #4273BA #6E94CB #9BB5DB

Accessibility & contrast

On white

4.78

#4273BA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.39

#4273BA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4273BA

4.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4273BA	#FFFFFF	#000000	##FFFFFF
##4273BA	1.00	4.78	4.39	4.78
#FFFFFF	4.78	1.00	21.00	1.00
#000000	4.39	21.00	1.00	21.00
##FFFFFF	4.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5479BD

Deuteranopia (green-blind)

#436DB9

Tritanopia (blue-blind)

#00838D

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #4273ba;
/* rgb */ color: rgb(66, 115, 186);
/* oklch */ color: oklch(55.5% 0.123 257.7);

Tailwind

colors: {
  custom: {
    50: '#829acf',
    500: '#4273ba',
    950: '#000000',
  },
}

SCSS

$custom: #4273ba;
$custom-light: #829acf;
$custom-dark: #000000;

JSON

{
  "hex": "#4273ba",
  "rgb": {
    "r": 66,
    "g": 115,
    "b": 186
  },
  "hsl": {
    "h": 215.5,
    "s": 47.619,
    "l": 49.412
  },
  "oklch": {
    "l": 0.55519,
    "c": 0.12318,
    "h": 257.7
  },
  "luminance": 0.16965
}

Semantic roles & 50–950 ramp

primary

#4273BA

secondary

#C8B190

accent

#A051D7

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #4273BA

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

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