#243F6F#243F6F

#243F6F is a dark, moderate blue. Relative luminance 0.051; OKLCH L 37.2% C 0.089 H 261.0°. Best body text is #FFFFFF at 10.42:1 contrast (WCAG AA passes).

Color values

HEX	#243F6F
RGB	rgb(36, 63, 111)
HSL	hsl(218, 51%, 29%)
HSV	hsv(218, 68%, 44%)
CMYK	cmyk(67.6%, 43.2%, 0%, 56.5%)
CIE-LAB	lab(26.95, 6.75, -30.89)
CIE-LCH	lch(26.95, 31.62, 282.33°)
OKLab	oklab(37.24% -0.0139 -0.088)
OKLCH	oklch(37.24% 0.089 261)
XYZ	xyz(5.3733, 5.0773, 15.7327)
Luminance	0.0508 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243F6F #6F5424

analogous

#24656F #243F6F #2F246F

triadic

#243F6F #6F243F #3F6F24

tetradic

#243F6F #6F2465 #6F5424 #246F2F

square

#243F6F #6F2465 #6F5424 #246F2F

split-complementary

#243F6F #6F2F24 #656F24

monochromatic

#070D17 #152541 #243F6F #33599D #4976C4

Accessibility & contrast

On white

10.42

#243F6F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.02

#243F6F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243F6F

10.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243F6F	#FFFFFF	#000000	##FFFFFF
##243F6F	1.00	10.42	2.02	10.42
#FFFFFF	10.42	1.00	21.00	1.00
#000000	2.02	21.00	1.00	21.00
##FFFFFF	10.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#294371

Deuteranopia (green-blind)

#1E3C6E

Tritanopia (blue-blind)

#004A51

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #243f6f;
/* rgb */ color: rgb(36, 63, 111);
/* oklch */ color: oklch(37.2% 0.089 261.0);

Tailwind

colors: {
  custom: {
    50: '#677398',
    500: '#243f6f',
    950: '#000000',
  },
}

SCSS

$custom: #243f6f;
$custom-light: #677398;
$custom-dark: #000000;

JSON

{
  "hex": "#243f6f",
  "rgb": {
    "r": 36,
    "g": 63,
    "b": 111
  },
  "hsl": {
    "h": 218.4,
    "s": 51.02,
    "l": 28.824
  },
  "oklch": {
    "l": 0.37239,
    "c": 0.08909,
    "h": 261
  },
  "luminance": 0.05078
}

Semantic roles & 50–950 ramp

primary

#243F6F

secondary

#A2834D

accent

#A84DDA

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06080E

muted

#7A7B7E

Preview Lab

Preview with #243F6F

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

Preview Lab → · Contrast checker → · Palette generator →