#4273C9#4273C9

#4273C9 is a mid, vivid blue. Relative luminance 0.176; OKLCH L 56.4% C 0.144 H 260.8°. Best body text is #FFFFFF at 4.64:1 contrast (WCAG AA passes).

Color values

HEX	#4273C9
RGB	rgb(66, 115, 201)
HSL	hsl(218, 56%, 52%)
HSV	hsv(218, 67%, 79%)
CMYK	cmyk(67.2%, 42.8%, 0%, 21.2%)
CIE-LAB	lab(49.05, 11.54, -49.65)
CIE-LCH	lch(49.05, 50.97, 283.08°)
OKLab	oklab(56.44% -0.023 -0.1417)
OKLCH	oklch(56.44% 0.144 260.8)
XYZ	xyz(18.9164, 17.6349, 57.6540)
Luminance	0.1764 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4273C9 #C99842

analogous

#42B7C9 #4273C9 #5442C9

triadic

#4273C9 #C94273 #73C942

tetradic

#4273C9 #C942B7 #C99842 #42C954

square

#4273C9 #C942B7 #C99842 #42C954

split-complementary

#4273C9 #C95442 #B7C942

monochromatic

#203D70 #2E57A0 #4273C9 #7296D7 #A1BAE4

Accessibility & contrast

On white

4.64

#4273C9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.53

#4273C9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #4273C9

4.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4273C9	#FFFFFF	#000000	##FFFFFF
##4273C9	1.00	4.64	4.53	4.64
#FFFFFF	4.64	1.00	21.00	1.00
#000000	4.53	21.00	1.00	21.00
##FFFFFF	4.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4A7BCC

Deuteranopia (green-blind)

#346FC7

Tritanopia (blue-blind)

#008794

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #4273c9;
/* rgb */ color: rgb(66, 115, 201);
/* oklch */ color: oklch(56.4% 0.144 260.8);

Tailwind

colors: {
  custom: {
    50: '#859ada',
    500: '#4273c9',
    950: '#000000',
  },
}

SCSS

$custom: #4273c9;
$custom-light: #859ada;
$custom-dark: #000000;

JSON

{
  "hex": "#4273c9",
  "rgb": {
    "r": 66,
    "g": 115,
    "b": 201
  },
  "hsl": {
    "h": 218.222,
    "s": 55.556,
    "l": 52.353
  },
  "oklch": {
    "l": 0.56439,
    "c": 0.1436,
    "h": 260.8
  },
  "luminance": 0.17637
}

Semantic roles & 50–950 ramp

primary

#4273C9

secondary

#D1BB96

accent

#A849DF

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #4273C9

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

Preview Lab → · Contrast checker → · Palette generator →