#243A5C#243A5C

#243A5C is a dark, moderate blue. Relative luminance 0.042; OKLCH L 34.8% C 0.066 H 258.8°. Best body text is #FFFFFF at 11.45:1 contrast (WCAG AA passes).

Color values

HEX	#243A5C
RGB	rgb(36, 58, 92)
HSL	hsl(216, 44%, 25%)
HSV	hsv(216, 61%, 36%)
CMYK	cmyk(60.9%, 37%, 0%, 63.9%)
CIE-LAB	lab(24.24, 2.94, -22.95)
CIE-LCH	lch(24.24, 23.13, 277.29°)
OKLab	oklab(34.76% -0.0128 -0.0648)
OKLCH	oklch(34.76% 0.066 258.8)
XYZ	xyz(4.1717, 4.1735, 10.7089)
Luminance	0.0417 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243A5C #5C4624

analogous

#24565C #243A5C #2A245C

triadic

#243A5C #5C243A #3A5C24

tetradic

#243A5C #5C2456 #5C4624 #245C2A

square

#243A5C #5C2456 #5C4624 #245C2A

split-complementary

#243A5C #5C2A24 #565C24

monochromatic

#090E16 #131E30 #243A5C #355688 #4671B4

Accessibility & contrast

On white

11.45

#243A5C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.83

#243A5C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243A5C

11.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243A5C	#FFFFFF	#000000	##FFFFFF
##243A5C	1.00	11.45	1.83	11.45
#FFFFFF	11.45	1.00	21.00	1.00
#000000	1.83	21.00	1.00	21.00
##FFFFFF	11.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2C3C5D

Deuteranopia (green-blind)

#25375B

Tritanopia (blue-blind)

#004246

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #243a5c;
/* rgb */ color: rgb(36, 58, 92);
/* oklch */ color: oklch(34.8% 0.066 258.8);

Tailwind

colors: {
  custom: {
    50: '#646f8a',
    500: '#243a5c',
    950: '#000000',
  },
}

SCSS

$custom: #243a5c;
$custom-light: #646f8a;
$custom-dark: #000000;

JSON

{
  "hex": "#243a5c",
  "rgb": {
    "r": 36,
    "g": 58,
    "b": 92
  },
  "hsl": {
    "h": 216.429,
    "s": 43.75,
    "l": 25.098
  },
  "oklch": {
    "l": 0.34763,
    "c": 0.06607,
    "h": 258.8
  },
  "luminance": 0.04174
}

Semantic roles & 50–950 ramp

primary

#243A5C

secondary

#90754C

accent

#A254D3

background

#F6F6F8

surface

#EBECF0

border

#C6C7CB

text

#06070B

muted

#7A7A7C

Preview Lab

Preview with #243A5C

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

Preview Lab → · Contrast checker → · Palette generator →