#4275CF#4275CF

#4275CF is a mid, vivid blue. Relative luminance 0.184; OKLCH L 57.3% C 0.149 H 260.9°. Best body text is #000000 at 4.68:1 contrast (WCAG AA passes).

Color values

HEX	#4275CF
RGB	rgb(66, 117, 207)
HSL	hsl(218, 59%, 54%)
HSV	hsv(218, 68%, 81%)
CMYK	cmyk(68.1%, 43.5%, 0%, 18.8%)
CIE-LAB	lab(49.96, 12.43, -51.62)
CIE-LCH	lch(49.96, 53.10, 283.54°)
OKLab	oklab(57.25% -0.0237 -0.1475)
OKLCH	oklch(57.25% 0.149 260.9)
XYZ	xyz(19.8665, 18.3838, 61.5208)
Luminance	0.1839 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4275CF #CF9C42

analogous

#42BBCF #4275CF #5542CF

triadic

#4275CF #CF4275 #75CF42

tetradic

#4275CF #CF42BB #CF9C42 #42CF55

square

#4275CF #CF42BB #CF9C42 #42CF55

split-complementary

#4275CF #CF5542 #BBCF42

monochromatic

#1F3F78 #2B58A9 #4275CF #7399DB #A4BCE8

Accessibility & contrast

On white

4.49

#4275CF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.68

#4275CF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4275CF

4.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4275CF	#FFFFFF	#000000	##000000
##4275CF	1.00	4.49	4.68	4.68
#FFFFFF	4.49	1.00	21.00	21.00
#000000	4.68	21.00	1.00	1.00
##000000	4.68	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4A7ED2

Deuteranopia (green-blind)

#3171CD

Tritanopia (blue-blind)

#008A98

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #4275cf;
/* rgb */ color: rgb(66, 117, 207);
/* oklch */ color: oklch(57.3% 0.149 260.9);

Tailwind

colors: {
  custom: {
    50: '#869cde',
    500: '#4275cf',
    950: '#000000',
  },
}

SCSS

$custom: #4275cf;
$custom-light: #869cde;
$custom-dark: #000000;

JSON

{
  "hex": "#4275cf",
  "rgb": {
    "r": 66,
    "g": 117,
    "b": 207
  },
  "hsl": {
    "h": 218.298,
    "s": 59.494,
    "l": 53.529
  },
  "oklch": {
    "l": 0.57253,
    "c": 0.14942,
    "h": 260.9
  },
  "luminance": 0.18386
}

Semantic roles & 50–950 ramp

primary

#4275CF

secondary

#D5BF98

accent

#AA45E3

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #4275CF

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

Preview Lab → · Contrast checker → · Palette generator →