#4273D7#4273D7

#4273D7 is a mid, vivid blue. Relative luminance 0.183; OKLCH L 57.4% C 0.163 H 262.7°. Best body text is #000000 at 4.67:1 contrast (WCAG AA passes).

Color values

HEX	#4273D7
RGB	rgb(66, 115, 215)
HSL	hsl(220, 65%, 55%)
HSV	hsv(220, 69%, 84%)
CMYK	cmyk(69.3%, 46.5%, 0%, 15.7%)
CIE-LAB	lab(49.89, 16.53, -56.28)
CIE-LCH	lch(49.89, 58.66, 286.37°)
OKLab	oklab(57.35% -0.0206 -0.1613)
OKLCH	oklch(57.35% 0.163 262.7)
XYZ	xyz(20.6389, 18.3239, 66.7260)
Luminance	0.1833 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4273D7 #D7A642

analogous

#42BED7 #4273D7 #5B42D7

triadic

#4273D7 #D74273 #73D742

tetradic

#4273D7 #D742BE #D7A642 #42D75B

square

#4273D7 #D742BE #D7A642 #42D75B

split-complementary

#4273D7 #D75B42 #BED742

monochromatic

#1C3E83 #2655B5 #4273D7 #7598E2 #A7BEEC

Accessibility & contrast

On white

4.50

#4273D7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.67

#4273D7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4273D7

4.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4273D7	#FFFFFF	#000000	##000000
##4273D7	1.00	4.50	4.67	4.67
#FFFFFF	4.50	1.00	21.00	21.00
#000000	4.67	21.00	1.00	1.00
##000000	4.67	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#3F7EDB

Deuteranopia (green-blind)

#1E70D5

Tritanopia (blue-blind)

#008A9A

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #4273d7;
/* rgb */ color: rgb(66, 115, 215);
/* oklch */ color: oklch(57.4% 0.163 262.7);

Tailwind

colors: {
  custom: {
    50: '#879ae4',
    500: '#4273d7',
    950: '#000000',
  },
}

SCSS

$custom: #4273d7;
$custom-light: #879ae4;
$custom-dark: #000000;

JSON

{
  "hex": "#4273d7",
  "rgb": {
    "r": 66,
    "g": 115,
    "b": 215
  },
  "hsl": {
    "h": 220.268,
    "s": 65.066,
    "l": 55.098
  },
  "oklch": {
    "l": 0.57353,
    "c": 0.16257,
    "h": 262.7
  },
  "luminance": 0.18326
}

Semantic roles & 50–950 ramp

primary

#4273D7

secondary

#DAC59B

accent

#B140E8

background

#F8F9FE

surface

#F0F2FC

border

#CBCCD5

text

#0D0E16

muted

#7D7E84

Preview Lab

Preview with #4273D7

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

Preview Lab → · Contrast checker → · Palette generator →