#243C7F#243C7F

#243C7F is a dark, moderate blue. Relative luminance 0.051; OKLCH L 37.7% C 0.117 H 266.1°. Best body text is #FFFFFF at 10.36:1 contrast (WCAG AA passes).

Color values

HEX	#243C7F
RGB	rgb(36, 60, 127)
HSL	hsl(224, 56%, 32%)
HSV	hsv(224, 72%, 50%)
CMYK	cmyk(71.7%, 52.8%, 0%, 50.2%)
CIE-LAB	lab(27.13, 15.09, -40.72)
CIE-LCH	lch(27.13, 43.43, 290.34°)
OKLab	oklab(37.72% -0.008 -0.1169)
OKLCH	oklch(37.72% 0.117 266.1)
XYZ	xyz(6.1728, 5.1385, 20.7411)
Luminance	0.0514 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243C7F #7F6724

analogous

#246A7F #243C7F #3A247F

triadic

#243C7F #7F243C #3C7F24

tetradic

#243C7F #7F246A #7F6724 #247F3A

square

#243C7F #7F246A #7F6724 #247F3A

split-complementary

#243C7F #7F3A24 #6A7F24

monochromatic

#090F20 #16254F #243C7F #3253AF #5071CD

Accessibility & contrast

On white

10.36

#243C7F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.03

#243C7F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243C7F

10.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243C7F	#FFFFFF	#000000	##FFFFFF
##243C7F	1.00	10.36	2.03	10.36
#FFFFFF	10.36	1.00	21.00	1.00
#000000	2.03	21.00	1.00	21.00
##FFFFFF	10.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#144481

Deuteranopia (green-blind)

#003C7E

Tritanopia (blue-blind)

#004C57

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #243c7f;
/* rgb */ color: rgb(36, 60, 127);
/* oklch */ color: oklch(37.7% 0.117 266.1);

Tailwind

colors: {
  custom: {
    50: '#6b71a5',
    500: '#243c7f',
    950: '#000000',
  },
}

SCSS

$custom: #243c7f;
$custom-light: #6b71a5;
$custom-dark: #000000;

JSON

{
  "hex": "#243c7f",
  "rgb": {
    "r": 36,
    "g": 60,
    "b": 127
  },
  "hsl": {
    "h": 224.176,
    "s": 55.828,
    "l": 31.961
  },
  "oklch": {
    "l": 0.37719,
    "c": 0.11722,
    "h": 266.1
  },
  "luminance": 0.05139
}

Semantic roles & 50–950 ramp

primary

#243C7F

secondary

#B1974E

accent

#B749DF

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #243C7F

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

Preview Lab → · Contrast checker → · Palette generator →