#243F59#243F59

#243F59 is a dark, muted cyan. Relative luminance 0.047; OKLCH L 35.9% C 0.056 H 248.8°. Best body text is #FFFFFF at 10.88:1 contrast (WCAG AA passes).

Color values

HEX	#243F59
RGB	rgb(36, 63, 89)
HSL	hsl(209, 42%, 25%)
HSV	hsv(209, 60%, 35%)
CMYK	cmyk(59.6%, 29.2%, 0%, 65.1%)
CIE-LAB	lab(25.72, -1.55, -18.67)
CIE-LCH	lch(25.72, 18.73, 265.27°)
OKLab	oklab(35.87% -0.0203 -0.0524)
OKLCH	oklch(35.87% 0.056 248.8)
XYZ	xyz(4.3076, 4.6510, 10.1200)
Luminance	0.0465 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243F59 #593E24

analogous

#245959 #243F59 #242559

triadic

#243F59 #59243F #3F5924

tetradic

#243F59 #592459 #593E24 #255924

square

#243F59 #592459 #593E24 #255924

split-complementary

#243F59 #592425 #595924

monochromatic

#090F16 #12202D #243F59 #365E85 #477DB0

Accessibility & contrast

On white

10.88

#243F59 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#243F59 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243F59

10.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243F59	#FFFFFF	#000000	##FFFFFF
##243F59	1.00	10.88	1.93	10.88
#FFFFFF	10.88	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#34405A

Deuteranopia (green-blind)

#2D3B58

Tritanopia (blue-blind)

#024548

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #243f59;
/* rgb */ color: rgb(36, 63, 89);
/* oklch */ color: oklch(35.9% 0.056 248.8);

Tailwind

colors: {
  custom: {
    50: '#637388',
    500: '#243f59',
    950: '#000000',
  },
}

SCSS

$custom: #243f59;
$custom-light: #637388;
$custom-dark: #000000;

JSON

{
  "hex": "#243f59",
  "rgb": {
    "r": 36,
    "g": 63,
    "b": 89
  },
  "hsl": {
    "h": 209.434,
    "s": 42.4,
    "l": 24.51
  },
  "oklch": {
    "l": 0.35869,
    "c": 0.05619,
    "h": 248.8
  },
  "luminance": 0.04651
}

Semantic roles & 50–950 ramp

primary

#243F59

secondary

#8D6C4C

accent

#9356D2

background

#F6F7F8

surface

#EBEDEF

border

#C6C8CA

text

#05080B

muted

#7A7B7C

Preview Lab

Preview with #243F59

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

Preview Lab → · Contrast checker → · Palette generator →