#243C8F#243C8F

#243C8F is a dark, vivid blue. Relative luminance 0.056; OKLCH L 39.0% C 0.141 H 267.3°. Best body text is #FFFFFF at 9.92:1 contrast (WCAG AA passes).

Color values

HEX	#243C8F
RGB	rgb(36, 60, 143)
HSL	hsl(227, 60%, 35%)
HSV	hsv(227, 75%, 56%)
CMYK	cmyk(74.8%, 58%, 0%, 43.9%)
CIE-LAB	lab(28.35, 21.36, -48.68)
CIE-LCH	lch(28.35, 53.16, 293.69°)
OKLab	oklab(39.03% -0.0067 -0.1403)
OKLCH	oklch(39.03% 0.141 267.3)
XYZ	xyz(7.2996, 5.5892, 26.6754)
Luminance	0.0559 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243C8F #8F7724

analogous

#24728F #243C8F #41248F

triadic

#243C8F #8F243C #3C8F24

tetradic

#243C8F #8F2472 #8F7724 #248F41

square

#243C8F #8F2472 #8F7724 #248F41

split-complementary

#243C8F #8F4124 #728F24

monochromatic

#0B132D #18275E #243C8F #3051C0 #5874D5

Accessibility & contrast

On white

9.92

#243C8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.12

#243C8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243C8F

9.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243C8F	#FFFFFF	#000000	##FFFFFF
##243C8F	1.00	9.92	2.12	9.92
#FFFFFF	9.92	1.00	21.00	1.00
#000000	2.12	21.00	1.00	21.00
##FFFFFF	9.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004892

Deuteranopia (green-blind)

#003E8D

Tritanopia (blue-blind)

#00505F

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #243c8f;
/* rgb */ color: rgb(36, 60, 143);
/* oklch */ color: oklch(39.0% 0.141 267.3);

Tailwind

colors: {
  custom: {
    50: '#6f71b0',
    500: '#243c8f',
    950: '#000000',
  },
}

SCSS

$custom: #243c8f;
$custom-light: #6f71b0;
$custom-dark: #000000;

JSON

{
  "hex": "#243c8f",
  "rgb": {
    "r": 36,
    "g": 60,
    "b": 143
  },
  "hsl": {
    "h": 226.542,
    "s": 59.777,
    "l": 35.098
  },
  "oklch": {
    "l": 0.39032,
    "c": 0.14051,
    "h": 267.3
  },
  "luminance": 0.0559
}

Semantic roles & 50–950 ramp

primary

#243C8F

secondary

#B9A355

accent

#BF45E3

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#080711

muted

#7B7A80

Preview Lab

Preview with #243C8F

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

Preview Lab → · Contrast checker → · Palette generator →