#243F79#243F79

#243F79 is a dark, moderate blue. Relative luminance 0.053; OKLCH L 37.9% C 0.104 H 263.5°. Best body text is #FFFFFF at 10.18:1 contrast (WCAG AA passes).

Color values

HEX	#243F79
RGB	rgb(36, 63, 121)
HSL	hsl(221, 54%, 31%)
HSV	hsv(221, 70%, 47%)
CMYK	cmyk(70.2%, 47.9%, 0%, 52.5%)
CIE-LAB	lab(27.60, 10.65, -36.19)
CIE-LCH	lch(27.60, 37.72, 286.41°)
OKLab	oklab(37.95% -0.0119 -0.1036)
OKLCH	oklch(37.95% 0.104 263.5)
XYZ	xyz(5.9550, 5.3100, 18.7965)
Luminance	0.0531 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243F79 #795E24

analogous

#246979 #243F79 #332479

triadic

#243F79 #79243F #3F7924

tetradic

#243F79 #792469 #795E24 #247933

square

#243F79 #792469 #795E24 #247933

split-complementary

#243F79 #793324 #697924

monochromatic

#080E1B #16264A #243F79 #3258A8 #4D75CA

Accessibility & contrast

On white

10.18

#243F79 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.06

#243F79 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243F79

10.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243F79	#FFFFFF	#000000	##FFFFFF
##243F79	1.00	10.18	2.06	10.18
#FFFFFF	10.18	1.00	21.00	1.00
#000000	2.06	21.00	1.00	21.00
##FFFFFF	10.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#22457B

Deuteranopia (green-blind)

#113E78

Tritanopia (blue-blind)

#004C56

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #243f79;
/* rgb */ color: rgb(36, 63, 121);
/* oklch */ color: oklch(37.9% 0.104 263.5);

Tailwind

colors: {
  custom: {
    50: '#6973a0',
    500: '#243f79',
    950: '#000000',
  },
}

SCSS

$custom: #243f79;
$custom-light: #6973a0;
$custom-dark: #000000;

JSON

{
  "hex": "#243f79",
  "rgb": {
    "r": 36,
    "g": 63,
    "b": 121
  },
  "hsl": {
    "h": 220.941,
    "s": 54.14,
    "l": 30.784
  },
  "oklch": {
    "l": 0.37946,
    "c": 0.10424,
    "h": 263.5
  },
  "luminance": 0.05311
}

Semantic roles & 50–950 ramp

primary

#243F79

secondary

#AC8E4D

accent

#AF4ADE

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#07080F

muted

#7A7B7E

Preview Lab

Preview with #243F79

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

Preview Lab → · Contrast checker → · Palette generator →