#4275E7#4275E7

#4275E7 is a mid, vivid blue. Relative luminance 0.197; OKLCH L 58.9% C 0.182 H 263.6°. Best body text is #000000 at 4.93:1 contrast (WCAG AA passes).

Color values

HEX	#4275E7
RGB	rgb(66, 117, 231)
HSL	hsl(221, 77%, 58%)
HSV	hsv(221, 71%, 91%)
CMYK	cmyk(71.4%, 49.4%, 0%, 9.4%)
CIE-LAB	lab(51.44, 21.02, -62.81)
CIE-LCH	lch(51.44, 66.23, 288.51°)
OKLab	oklab(58.86% -0.0201 -0.1804)
OKLCH	oklch(58.86% 0.182 263.6)
XYZ	xyz(23.0267, 19.6479, 78.1647)
Luminance	0.1965 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4275E7 #E7B442

analogous

#42C7E7 #4275E7 #6242E7

triadic

#4275E7 #E74275 #75E742

tetradic

#4275E7 #E742C7 #E7B442 #42E762

square

#4275E7 #E742C7 #E7B442 #42E762

split-complementary

#4275E7 #E76242 #C7E742

monochromatic

#143D9B #1B53D1 #4275E7 #789DEE #AFC4F5

Accessibility & contrast

On white

4.26

#4275E7 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.93

#4275E7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4275E7

4.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4275E7	#FFFFFF	#000000	##000000
##4275E7	1.00	4.26	4.93	4.93
#FFFFFF	4.26	1.00	21.00	21.00
#000000	4.93	21.00	1.00	1.00
##000000	4.93	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#3283EB

Deuteranopia (green-blind)

#0073E5

Tritanopia (blue-blind)

#0090A3

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #4275e7;
/* rgb */ color: rgb(66, 117, 231);
/* oklch */ color: oklch(58.9% 0.182 263.6);

Tailwind

colors: {
  custom: {
    50: '#8a9cef',
    500: '#4275e7',
    950: '#000000',
  },
}

SCSS

$custom: #4275e7;
$custom-light: #8a9cef;
$custom-dark: #000000;

JSON

{
  "hex": "#4275e7",
  "rgb": {
    "r": 66,
    "g": 117,
    "b": 231
  },
  "hsl": {
    "h": 221.455,
    "s": 77.465,
    "l": 58.235
  },
  "oklch": {
    "l": 0.58862,
    "c": 0.18155,
    "h": 263.6
  },
  "luminance": 0.1965
}

Semantic roles & 50–950 ramp

primary

#4275E7

secondary

#E3CFA2

accent

#B934F4

background

#F9F9FE

surface

#F2F2FD

border

#CCCCD5

text

#0D0E16

muted

#7E7E84

Preview Lab

Preview with #4275E7

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

Preview Lab → · Contrast checker → · Palette generator →