#4275CB#4275CB

#4275CB is a mid, vivid blue. Relative luminance 0.182; OKLCH L 57.0% C 0.144 H 260.2°. Best body text is #000000 at 4.64:1 contrast (WCAG AA passes).

Color values

HEX	#4275CB
RGB	rgb(66, 117, 203)
HSL	hsl(218, 57%, 53%)
HSV	hsv(218, 67%, 80%)
CMYK	cmyk(67.5%, 42.4%, 0%, 20.4%)
CIE-LAB	lab(49.73, 11.00, -49.71)
CIE-LCH	lch(49.73, 50.91, 282.48°)
OKLab	oklab(57% -0.0245 -0.1419)
OKLCH	oklch(57% 0.144 260.2)
XYZ	xyz(19.3837, 18.1907, 58.9780)
Luminance	0.1819 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4275CB #CB9842

analogous

#42B9CB #4275CB #5342CB

triadic

#4275CB #CB4275 #75CB42

tetradic

#4275CB #CB42B9 #CB9842 #42CB53

square

#4275CB #CB42B9 #CB9842 #42CB53

split-complementary

#4275CB #CB5342 #B9CB42

monochromatic

#203F73 #2D59A3 #4275CB #7298D8 #A2BBE5

Accessibility & contrast

On white

4.53

#4275CB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.64

#4275CB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4275CB

4.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4275CB	#FFFFFF	#000000	##000000
##4275CB	1.00	4.53	4.64	4.64
#FFFFFF	4.53	1.00	21.00	21.00
#000000	4.64	21.00	1.00	1.00
##000000	4.64	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4C7DCE

Deuteranopia (green-blind)

#3670C9

Tritanopia (blue-blind)

#008996

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #4275cb;
/* rgb */ color: rgb(66, 117, 203);
/* oklch */ color: oklch(57.0% 0.144 260.2);

Tailwind

colors: {
  custom: {
    50: '#859cdb',
    500: '#4275cb',
    950: '#000000',
  },
}

SCSS

$custom: #4275cb;
$custom-light: #859cdb;
$custom-dark: #000000;

JSON

{
  "hex": "#4275cb",
  "rgb": {
    "r": 66,
    "g": 117,
    "b": 203
  },
  "hsl": {
    "h": 217.664,
    "s": 56.846,
    "l": 52.745
  },
  "oklch": {
    "l": 0.56999,
    "c": 0.14401,
    "h": 260.2
  },
  "luminance": 0.18193
}

Semantic roles & 50–950 ramp

primary

#4275CB

secondary

#D2BC97

accent

#A748E0

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #4275CB

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

Preview Lab → · Contrast checker → · Palette generator →