#4258CB#4258CB

#4258CB is a mid, vivid blue. Relative luminance 0.124; OKLCH L 51.1% C 0.179 H 270.5°. Best body text is #FFFFFF at 6.02:1 contrast (WCAG AA passes).

Color values

HEX	#4258CB
RGB	rgb(66, 88, 203)
HSL	hsl(230, 57%, 53%)
HSV	hsv(230, 67%, 80%)
CMYK	cmyk(67.5%, 56.7%, 0%, 20.4%)
CIE-LAB	lab(41.92, 29.34, -62.28)
CIE-LCH	lch(41.92, 68.85, 295.22°)
OKLab	oklab(51.06% 0.0017 -0.1793)
OKLCH	oklch(51.06% 0.179 270.5)
XYZ	xyz(16.5123, 12.4479, 58.0208)
Luminance	0.1245 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4258CB #CBB542

analogous

#429CCB #4258CB #7042CB

triadic

#4258CB #CB4258 #58CB42

tetradic

#4258CB #CB429C #CBB542 #42CB70

square

#4258CB #CB429C #CBB542 #42CB70

split-complementary

#4258CB #CB7042 #9CCB42

monochromatic

#202D73 #2D40A3 #4258CB #7282D8 #A2ADE5

Accessibility & contrast

On white

6.02

#4258CB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.49

#4258CB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4258CB

6.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4258CB	#FFFFFF	#000000	##FFFFFF
##4258CB	1.00	6.02	3.49	6.02
#FFFFFF	6.02	1.00	21.00	1.00
#000000	3.49	21.00	1.00	21.00
##FFFFFF	6.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0069CF

Deuteranopia (green-blind)

#005DC9

Tritanopia (blue-blind)

#007489

Achromatopsia (no color)

#636363

Design tokens & code

CSS

--color: #4258cb;
/* rgb */ color: rgb(66, 88, 203);
/* oklch */ color: oklch(51.1% 0.179 270.5);

Tailwind

colors: {
  custom: {
    50: '#8686dc',
    500: '#4258cb',
    950: '#000000',
  },
}

SCSS

$custom: #4258cb;
$custom-light: #8686dc;
$custom-dark: #000000;

JSON

{
  "hex": "#4258cb",
  "rgb": {
    "r": 66,
    "g": 88,
    "b": 203
  },
  "hsl": {
    "h": 230.365,
    "s": 56.846,
    "l": 52.745
  },
  "oklch": {
    "l": 0.51057,
    "c": 0.17933,
    "h": 270.5
  },
  "luminance": 0.12449
}

Semantic roles & 50–950 ramp

primary

#4258CB

secondary

#D2C997

accent

#C848E0

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0C0B15

muted

#7D7C83

Preview Lab

Preview with #4258CB

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

Preview Lab → · Contrast checker → · Palette generator →