#243C83#243C83

#243C83 is a dark, vivid blue. Relative luminance 0.052; OKLCH L 38.0% C 0.123 H 266.5°. Best body text is #FFFFFF at 10.25:1 contrast (WCAG AA passes).

Color values

HEX	#243C83
RGB	rgb(36, 60, 131)
HSL	hsl(225, 57%, 33%)
HSV	hsv(225, 73%, 51%)
CMYK	cmyk(72.5%, 54.2%, 0%, 48.6%)
CIE-LAB	lab(27.42, 16.66, -42.75)
CIE-LCH	lch(27.42, 45.88, 291.30°)
OKLab	oklab(38.04% -0.0076 -0.1229)
OKLCH	oklch(38.04% 0.123 266.5)
XYZ	xyz(6.4387, 5.2448, 22.1414)
Luminance	0.0524 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243C83 #836B24

analogous

#246B83 #243C83 #3B2483

triadic

#243C83 #83243C #3C8324

tetradic

#243C83 #83246B #836B24 #24833B

square

#243C83 #83246B #836B24 #24833B

split-complementary

#243C83 #833B24 #6B8324

monochromatic

#0A1023 #172653 #243C83 #3152B3 #5272CF

Accessibility & contrast

On white

10.25

#243C83 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.05

#243C83 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243C83

10.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243C83	#FFFFFF	#000000	##FFFFFF
##243C83	1.00	10.25	2.05	10.25
#FFFFFF	10.25	1.00	21.00	1.00
#000000	2.05	21.00	1.00	21.00
##FFFFFF	10.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0C4586

Deuteranopia (green-blind)

#003D82

Tritanopia (blue-blind)

#004D59

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #243c83;
/* rgb */ color: rgb(36, 60, 131);
/* oklch */ color: oklch(38.0% 0.123 266.5);

Tailwind

colors: {
  custom: {
    50: '#6c71a8',
    500: '#243c83',
    950: '#000000',
  },
}

SCSS

$custom: #243c83;
$custom-light: #6c71a8;
$custom-dark: #000000;

JSON

{
  "hex": "#243c83",
  "rgb": {
    "r": 36,
    "g": 60,
    "b": 131
  },
  "hsl": {
    "h": 224.842,
    "s": 56.886,
    "l": 32.745
  },
  "oklch": {
    "l": 0.38037,
    "c": 0.12314,
    "h": 266.5
  },
  "luminance": 0.05245
}

Semantic roles & 50–950 ramp

primary

#243C83

secondary

#B39A4F

accent

#BA48E0

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#08070F

muted

#7A7A7F

Preview Lab

Preview with #243C83

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

Preview Lab → · Contrast checker → · Palette generator →