#243C79#243C79

#243C79 is a dark, moderate blue. Relative luminance 0.050; OKLCH L 37.3% C 0.108 H 265.3°. Best body text is #FFFFFF at 10.51:1 contrast (WCAG AA passes).

Color values

HEX	#243C79
RGB	rgb(36, 60, 121)
HSL	hsl(223, 54%, 31%)
HSV	hsv(223, 70%, 47%)
CMYK	cmyk(70.2%, 50.4%, 0%, 52.5%)
CIE-LAB	lab(26.70, 12.74, -37.64)
CIE-LCH	lch(26.70, 39.74, 288.69°)
OKLab	oklab(37.26% -0.0088 -0.1079)
OKLCH	oklch(37.26% 0.108 265.3)
XYZ	xyz(5.7934, 4.9867, 18.7427)
Luminance	0.0499 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243C79 #796124

analogous

#246679 #243C79 #362479

triadic

#243C79 #79243C #3C7924

tetradic

#243C79 #792466 #796124 #247936

square

#243C79 #792466 #796124 #247936

split-complementary

#243C79 #793624 #667924

monochromatic

#080D1B #16254A #243C79 #3253A8 #4D71CA

Accessibility & contrast

On white

10.51

#243C79 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.00

#243C79 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243C79

10.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243C79	#FFFFFF	#000000	##FFFFFF
##243C79	1.00	10.51	2.00	10.51
#FFFFFF	10.51	1.00	21.00	1.00
#000000	2.00	21.00	1.00	21.00
##FFFFFF	10.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B437B

Deuteranopia (green-blind)

#063B78

Tritanopia (blue-blind)

#004A54

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #243c79;
/* rgb */ color: rgb(36, 60, 121);
/* oklch */ color: oklch(37.3% 0.108 265.3);

Tailwind

colors: {
  custom: {
    50: '#6971a0',
    500: '#243c79',
    950: '#000000',
  },
}

SCSS

$custom: #243c79;
$custom-light: #6971a0;
$custom-dark: #000000;

JSON

{
  "hex": "#243c79",
  "rgb": {
    "r": 36,
    "g": 60,
    "b": 121
  },
  "hsl": {
    "h": 223.059,
    "s": 54.14,
    "l": 30.784
  },
  "oklch": {
    "l": 0.37255,
    "c": 0.10824,
    "h": 265.3
  },
  "luminance": 0.04987
}

Semantic roles & 50–950 ramp

primary

#243C79

secondary

#AC914D

accent

#B44ADE

background

#F6F6F9

surface

#ECECF2

border

#C7C7CC

text

#07070F

muted

#7A7A7E

Preview Lab

Preview with #243C79

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

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