#243C9E#243C9E

#243C9E is a dark, vivid blue. Relative luminance 0.061; OKLCH L 40.4% C 0.161 H 267.7°. Best body text is #FFFFFF at 9.48:1 contrast (WCAG AA passes).

Color values

HEX	#243C9E
RGB	rgb(36, 60, 158)
HSL	hsl(228, 63%, 38%)
HSV	hsv(228, 77%, 62%)
CMYK	cmyk(77.2%, 62%, 0%, 38%)
CIE-LAB	lab(29.60, 27.16, -55.81)
CIE-LCH	lch(29.60, 62.07, 295.95°)
OKLab	oklab(40.35% -0.0064 -0.1613)
OKLCH	oklch(40.35% 0.161 267.7)
XYZ	xyz(8.5128, 6.0745, 33.0650)
Luminance	0.0607 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243C9E #9E8624

analogous

#24799E #243C9E #49249E

triadic

#243C9E #9E243C #3C9E24

tetradic

#243C9E #9E2479 #9E8624 #249E49

square

#243C9E #9E2479 #9E8624 #249E49

split-complementary

#243C9E #9E4924 #799E24

monochromatic

#0D163A #19296C #243C9E #2F4FD0 #6179DB

Accessibility & contrast

On white

9.48

#243C9E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.22

#243C9E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243C9E

9.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243C9E	#FFFFFF	#000000	##FFFFFF
##243C9E	1.00	9.48	2.22	9.48
#FFFFFF	9.48	1.00	21.00	1.00
#000000	2.22	21.00	1.00	21.00
##FFFFFF	9.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CA1

Deuteranopia (green-blind)

#00409C

Tritanopia (blue-blind)

#005567

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #243c9e;
/* rgb */ color: rgb(36, 60, 158);
/* oklch */ color: oklch(40.4% 0.161 267.7);

Tailwind

colors: {
  custom: {
    50: '#7271bc',
    500: '#243c9e',
    950: '#000000',
  },
}

SCSS

$custom: #243c9e;
$custom-light: #7271bc;
$custom-dark: #000000;

JSON

{
  "hex": "#243c9e",
  "rgb": {
    "r": 36,
    "g": 60,
    "b": 158
  },
  "hsl": {
    "h": 228.197,
    "s": 62.887,
    "l": 38.039
  },
  "oklch": {
    "l": 0.40353,
    "c": 0.16143,
    "h": 267.7
  },
  "luminance": 0.06075
}

Semantic roles & 50–950 ramp

primary

#243C9E

secondary

#C0AD5E

accent

#C642E6

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #243C9E

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

Preview Lab → · Contrast checker → · Palette generator →