#243C78#243C78

#243C78 is a dark, moderate blue. Relative luminance 0.050; OKLCH L 37.2% C 0.107 H 265.2°. Best body text is #FFFFFF at 10.54:1 contrast (WCAG AA passes).

Color values

HEX	#243C78
RGB	rgb(36, 60, 120)
HSL	hsl(223, 54%, 31%)
HSV	hsv(223, 70%, 47%)
CMYK	cmyk(70%, 50%, 0%, 52.9%)
CIE-LAB	lab(26.63, 12.34, -37.12)
CIE-LCH	lch(26.63, 39.12, 288.39°)
OKLab	oklab(37.18% -0.0089 -0.1063)
OKLCH	oklch(37.18% 0.107 265.2)
XYZ	xyz(5.7324, 4.9623, 18.4214)
Luminance	0.0496 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243C78 #786024

analogous

#246678 #243C78 #362478

triadic

#243C78 #78243C #3C7824

tetradic

#243C78 #782466 #786024 #247836

square

#243C78 #782466 #786024 #247836

split-complementary

#243C78 #783624 #667824

monochromatic

#080D1A #162449 #243C78 #3254A7 #4D70CA

Accessibility & contrast

On white

10.54

#243C78 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.99

#243C78 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243C78

10.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243C78	#FFFFFF	#000000	##FFFFFF
##243C78	1.00	10.54	1.99	10.54
#FFFFFF	10.54	1.00	21.00	1.00
#000000	1.99	21.00	1.00	21.00
##FFFFFF	10.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1C437A

Deuteranopia (green-blind)

#083B77

Tritanopia (blue-blind)

#004A54

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #243c78;
/* rgb */ color: rgb(36, 60, 120);
/* oklch */ color: oklch(37.2% 0.107 265.2);

Tailwind

colors: {
  custom: {
    50: '#69719f',
    500: '#243c78',
    950: '#000000',
  },
}

SCSS

$custom: #243c78;
$custom-light: #69719f;
$custom-dark: #000000;

JSON

{
  "hex": "#243c78",
  "rgb": {
    "r": 36,
    "g": 60,
    "b": 120
  },
  "hsl": {
    "h": 222.857,
    "s": 53.846,
    "l": 30.588
  },
  "oklch": {
    "l": 0.37179,
    "c": 0.10673,
    "h": 265.2
  },
  "luminance": 0.04963
}

Semantic roles & 50–950 ramp

primary

#243C78

secondary

#AB904D

accent

#B34BDD

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#07070E

muted

#7A7A7E

Preview Lab

Preview with #243C78

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

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