#4273DB#4273DB

#4273DB is a mid, vivid blue. Relative luminance 0.185; OKLCH L 57.6% C 0.168 H 263.2°. Best body text is #000000 at 4.71:1 contrast (WCAG AA passes).

Color values

HEX	#4273DB
RGB	rgb(66, 115, 219)
HSL	hsl(221, 68%, 56%)
HSV	hsv(221, 70%, 86%)
CMYK	cmyk(69.9%, 47.5%, 0%, 14.1%)
CIE-LAB	lab(50.14, 17.97, -58.15)
CIE-LCH	lch(50.14, 60.86, 287.17°)
OKLab	oklab(57.62% -0.02 -0.1667)
OKLCH	oklch(57.62% 0.168 263.2)
XYZ	xyz(21.1592, 18.5320, 69.4660)
Luminance	0.1853 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4273DB #DBAA42

analogous

#42C0DB #4273DB #5D42DB

triadic

#4273DB #DB4273 #73DB42

tetradic

#4273DB #DB42C0 #DBAA42 #42DB5D

square

#4273DB #DB42C0 #DBAA42 #42DB5D

split-complementary

#4273DB #DB5D42 #C0DB42

monochromatic

#1A3D89 #2455BC #4273DB #7599E5 #A9BFEF

Accessibility & contrast

On white

4.46

#4273DB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.71

#4273DB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4273DB

4.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4273DB	#FFFFFF	#000000	##000000
##4273DB	1.00	4.46	4.71	4.71
#FFFFFF	4.46	1.00	21.00	21.00
#000000	4.71	21.00	1.00	1.00
##000000	4.71	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#3B7FDF

Deuteranopia (green-blind)

#1271D9

Tritanopia (blue-blind)

#008B9C

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #4273db;
/* rgb */ color: rgb(66, 115, 219);
/* oklch */ color: oklch(57.6% 0.168 263.2);

Tailwind

colors: {
  custom: {
    50: '#889ae7',
    500: '#4273db',
    950: '#000000',
  },
}

SCSS

$custom: #4273db;
$custom-light: #889ae7;
$custom-dark: #000000;

JSON

{
  "hex": "#4273db",
  "rgb": {
    "r": 66,
    "g": 115,
    "b": 219
  },
  "hsl": {
    "h": 220.784,
    "s": 68,
    "l": 55.882
  },
  "oklch": {
    "l": 0.57623,
    "c": 0.16794,
    "h": 263.2
  },
  "luminance": 0.18534
}

Semantic roles & 50–950 ramp

primary

#4273DB

secondary

#DCC89D

accent

#B33DEB

background

#F9F9FE

surface

#F1F2FC

border

#CBCCD5

text

#0D0E16

muted

#7E7E84

Preview Lab

Preview with #4273DB

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

Preview Lab → · Contrast checker → · Palette generator →