#243B5B#243B5B

#243B5B is a dark, moderate cyan. Relative luminance 0.043; OKLCH L 35.0% C 0.063 H 256.9°. Best body text is #FFFFFF at 11.34:1 contrast (WCAG AA passes).

Color values

HEX	#243B5B
RGB	rgb(36, 59, 91)
HSL	hsl(215, 43%, 25%)
HSV	hsv(215, 60%, 36%)
CMYK	cmyk(60.4%, 35.2%, 0%, 64.3%)
CIE-LAB	lab(24.51, 1.88, -21.87)
CIE-LCH	lch(24.51, 21.95, 274.91°)
OKLab	oklab(34.96% -0.0144 -0.0617)
OKLCH	oklch(34.96% 0.063 256.9)
XYZ	xyz(4.1792, 4.2580, 10.4971)
Luminance	0.0426 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243B5B #5B4424

analogous

#24575B #243B5B #29245B

triadic

#243B5B #5B243B #3B5B24

tetradic

#243B5B #5B2457 #5B4424 #245B29

square

#243B5B #5B2457 #5B4424 #245B29

split-complementary

#243B5B #5B2924 #575B24

monochromatic

#090E16 #131F2F #243B5B #355787 #4774B3

Accessibility & contrast

On white

11.34

#243B5B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.85

#243B5B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243B5B

11.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243B5B	#FFFFFF	#000000	##FFFFFF
##243B5B	1.00	11.34	1.85	11.34
#FFFFFF	11.34	1.00	21.00	1.00
#000000	1.85	21.00	1.00	21.00
##FFFFFF	11.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E3D5C

Deuteranopia (green-blind)

#27385A

Tritanopia (blue-blind)

#004246

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #243b5b;
/* rgb */ color: rgb(36, 59, 91);
/* oklch */ color: oklch(35.0% 0.063 256.9);

Tailwind

colors: {
  custom: {
    50: '#647089',
    500: '#243b5b',
    950: '#000000',
  },
}

SCSS

$custom: #243b5b;
$custom-light: #647089;
$custom-dark: #000000;

JSON

{
  "hex": "#243b5b",
  "rgb": {
    "r": 36,
    "g": 59,
    "b": 91
  },
  "hsl": {
    "h": 214.909,
    "s": 43.307,
    "l": 24.902
  },
  "oklch": {
    "l": 0.34955,
    "c": 0.06334,
    "h": 256.9
  },
  "luminance": 0.04258
}

Semantic roles & 50–950 ramp

primary

#243B5B

secondary

#8F734C

accent

#9E55D3

background

#F6F6F8

surface

#EBECF0

border

#C6C7CB

text

#06070B

muted

#7A7A7C

Preview Lab

Preview with #243B5B

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

Preview Lab → · Contrast checker → · Palette generator →