#4275E1#4275E1

#4275E1 is a mid, vivid blue. Relative luminance 0.193; OKLCH L 58.4% C 0.174 H 263.1°. Best body text is #000000 at 4.86:1 contrast (WCAG AA passes).

Color values

HEX	#4275E1
RGB	rgb(66, 117, 225)
HSL	hsl(221, 73%, 57%)
HSV	hsv(221, 71%, 88%)
CMYK	cmyk(70.7%, 48%, 0%, 11.8%)
CIE-LAB	lab(51.05, 18.87, -60.06)
CIE-LCH	lch(51.05, 62.95, 287.44°)
OKLab	oklab(58.45% -0.0209 -0.1723)
OKLCH	oklch(58.45% 0.174 263.1)
XYZ	xyz(22.1938, 19.3147, 73.7780)
Luminance	0.1932 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4275E1 #E1AE42

analogous

#42C4E1 #4275E1 #5F42E1

triadic

#4275E1 #E14275 #75E142

tetradic

#4275E1 #E142C4 #E1AE42 #42E15F

square

#4275E1 #E142C4 #E1AE42 #42E15F

split-complementary

#4275E1 #E15F42 #C4E142

monochromatic

#173E92 #1F55C6 #4275E1 #779CE9 #ACC2F2

Accessibility & contrast

On white

4.32

#4275E1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.86

#4275E1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4275E1

4.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4275E1	#FFFFFF	#000000	##000000
##4275E1	1.00	4.32	4.86	4.86
#FFFFFF	4.32	1.00	21.00	21.00
#000000	4.86	21.00	1.00	1.00
##000000	4.86	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#3981E5

Deuteranopia (green-blind)

#0573DF

Tritanopia (blue-blind)

#008EA0

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #4275e1;
/* rgb */ color: rgb(66, 117, 225);
/* oklch */ color: oklch(58.4% 0.174 263.1);

Tailwind

colors: {
  custom: {
    50: '#899ceb',
    500: '#4275e1',
    950: '#000000',
  },
}

SCSS

$custom: #4275e1;
$custom-light: #899ceb;
$custom-dark: #000000;

JSON

{
  "hex": "#4275e1",
  "rgb": {
    "r": 66,
    "g": 117,
    "b": 225
  },
  "hsl": {
    "h": 220.755,
    "s": 72.603,
    "l": 57.059
  },
  "oklch": {
    "l": 0.58447,
    "c": 0.17359,
    "h": 263.1
  },
  "luminance": 0.19317
}

Semantic roles & 50–950 ramp

primary

#4275E1

secondary

#E0CB9F

accent

#B538EF

background

#F9F9FE

surface

#F1F2FD

border

#CBCCD5

text

#0D0E16

muted

#7E7E84

Preview Lab

Preview with #4275E1

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

Preview Lab → · Contrast checker → · Palette generator →