#243B83#243B83

#243B83 is a dark, vivid blue. Relative luminance 0.051; OKLCH L 37.8% C 0.124 H 266.9°. Best body text is #FFFFFF at 10.35:1 contrast (WCAG AA passes).

Color values

HEX	#243B83
RGB	rgb(36, 59, 131)
HSL	hsl(225, 57%, 33%)
HSV	hsv(225, 73%, 51%)
CMYK	cmyk(72.5%, 55%, 0%, 48.6%)
CIE-LAB	lab(27.13, 17.36, -43.21)
CIE-LCH	lch(27.13, 46.57, 291.89°)
OKLab	oklab(37.82% -0.0067 -0.1243)
OKLCH	oklch(37.82% 0.124 266.9)
XYZ	xyz(6.3868, 5.1410, 22.1241)
Luminance	0.0514 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243B83 #836C24

analogous

#246A83 #243B83 #3D2483

triadic

#243B83 #83243B #3B8324

tetradic

#243B83 #83246A #836C24 #24833D

square

#243B83 #83246A #836C24 #24833D

split-complementary

#243B83 #833D24 #6A8324

monochromatic

#0A1023 #172553 #243B83 #3151B3 #5270CF

Accessibility & contrast

On white

10.35

#243B83 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.03

#243B83 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243B83

10.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243B83	#FFFFFF	#000000	##FFFFFF
##243B83	1.00	10.35	2.03	10.35
#FFFFFF	10.35	1.00	21.00	1.00
#000000	2.03	21.00	1.00	21.00
##FFFFFF	10.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#074586

Deuteranopia (green-blind)

#003C82

Tritanopia (blue-blind)

#004C59

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #243b83;
/* rgb */ color: rgb(36, 59, 131);
/* oklch */ color: oklch(37.8% 0.124 266.9);

Tailwind

colors: {
  custom: {
    50: '#6c70a8',
    500: '#243b83',
    950: '#000000',
  },
}

SCSS

$custom: #243b83;
$custom-light: #6c70a8;
$custom-dark: #000000;

JSON

{
  "hex": "#243b83",
  "rgb": {
    "r": 36,
    "g": 59,
    "b": 131
  },
  "hsl": {
    "h": 225.474,
    "s": 56.886,
    "l": 32.745
  },
  "oklch": {
    "l": 0.37819,
    "c": 0.12448,
    "h": 266.9
  },
  "luminance": 0.05142
}

Semantic roles & 50–950 ramp

primary

#243B83

secondary

#B39B4F

accent

#BB48E0

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#08070F

muted

#7A7A7F

Preview Lab

Preview with #243B83

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

Preview Lab → · Contrast checker → · Palette generator →