#243F83#243F83

#243F83 is a dark, moderate blue. Relative luminance 0.056; OKLCH L 38.7% C 0.119 H 265.0°. Best body text is #FFFFFF at 9.93:1 contrast (WCAG AA passes).

Color values

HEX	#243F83
RGB	rgb(36, 63, 131)
HSL	hsl(223, 57%, 33%)
HSV	hsv(223, 73%, 51%)
CMYK	cmyk(72.5%, 51.9%, 0%, 48.6%)
CIE-LAB	lab(28.30, 14.59, -41.33)
CIE-LCH	lch(28.30, 43.83, 289.44°)
OKLab	oklab(38.7% -0.0104 -0.1187)
OKLCH	oklch(38.7% 0.119 265)
XYZ	xyz(6.6004, 5.5681, 22.1952)
Luminance	0.0557 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243F83 #836824

analogous

#246F83 #243F83 #382483

triadic

#243F83 #83243F #3F8324

tetradic

#243F83 #83246F #836824 #248338

square

#243F83 #83246F #836824 #248338

split-complementary

#243F83 #833824 #6F8324

monochromatic

#0A1123 #172853 #243F83 #3156B3 #5276CF

Accessibility & contrast

On white

9.93

#243F83 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.11

#243F83 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243F83

9.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243F83	#FFFFFF	#000000	##FFFFFF
##243F83	1.00	9.93	2.11	9.93
#FFFFFF	9.93	1.00	21.00	1.00
#000000	2.11	21.00	1.00	21.00
##FFFFFF	9.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#174785

Deuteranopia (green-blind)

#003F82

Tritanopia (blue-blind)

#004F5A

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #243f83;
/* rgb */ color: rgb(36, 63, 131);
/* oklch */ color: oklch(38.7% 0.119 265.0);

Tailwind

colors: {
  custom: {
    50: '#6c73a7',
    500: '#243f83',
    950: '#000000',
  },
}

SCSS

$custom: #243f83;
$custom-light: #6c73a7;
$custom-dark: #000000;

JSON

{
  "hex": "#243f83",
  "rgb": {
    "r": 36,
    "g": 63,
    "b": 131
  },
  "hsl": {
    "h": 222.947,
    "s": 56.886,
    "l": 32.745
  },
  "oklch": {
    "l": 0.38701,
    "c": 0.11915,
    "h": 265
  },
  "luminance": 0.05569
}

Semantic roles & 50–950 ramp

primary

#243F83

secondary

#B3974F

accent

#B548E0

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#08080F

muted

#7B7B7F

Preview Lab

Preview with #243F83

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

Preview Lab → · Contrast checker → · Palette generator →