#243B5A#243B5A

#243B5A is a dark, moderate cyan. Relative luminance 0.042; OKLCH L 34.9% C 0.062 H 256.2°. Best body text is #FFFFFF at 11.36:1 contrast (WCAG AA passes).

Color values

HEX	#243B5A
RGB	rgb(36, 59, 90)
HSL	hsl(214, 43%, 25%)
HSV	hsv(214, 60%, 35%)
CMYK	cmyk(60%, 34.4%, 0%, 64.7%)
CIE-LAB	lab(24.45, 1.51, -21.30)
CIE-LCH	lch(24.45, 21.35, 274.05°)
OKLab	oklab(34.89% -0.0147 -0.06)
OKLCH	oklch(34.89% 0.062 256.2)
XYZ	xyz(4.1363, 4.2408, 10.2715)
Luminance	0.0424 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243B5A #5A4324

analogous

#24565A #243B5A #28245A

triadic

#243B5A #5A243B #3B5A24

tetradic

#243B5A #5A2456 #5A4324 #245A28

square

#243B5A #5A2456 #5A4324 #245A28

split-complementary

#243B5A #5A2824 #565A24

monochromatic

#090E16 #131E2E #243B5A #355886 #4774B1

Accessibility & contrast

On white

11.36

#243B5A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.85

#243B5A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243B5A

11.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243B5A	#FFFFFF	#000000	##FFFFFF
##243B5A	1.00	11.36	1.85	11.36
#FFFFFF	11.36	1.00	21.00	1.00
#000000	1.85	21.00	1.00	21.00
##FFFFFF	11.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E3D5B

Deuteranopia (green-blind)

#283859

Tritanopia (blue-blind)

#024246

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #243b5a;
/* rgb */ color: rgb(36, 59, 90);
/* oklch */ color: oklch(34.9% 0.062 256.2);

Tailwind

colors: {
  custom: {
    50: '#637089',
    500: '#243b5a',
    950: '#000000',
  },
}

SCSS

$custom: #243b5a;
$custom-light: #637089;
$custom-dark: #000000;

JSON

{
  "hex": "#243b5a",
  "rgb": {
    "r": 36,
    "g": 59,
    "b": 90
  },
  "hsl": {
    "h": 214.444,
    "s": 42.857,
    "l": 24.706
  },
  "oklch": {
    "l": 0.34895,
    "c": 0.06181,
    "h": 256.2
  },
  "luminance": 0.04241
}

Semantic roles & 50–950 ramp

primary

#243B5A

secondary

#8E724C

accent

#9D55D3

background

#F6F6F8

surface

#EBECF0

border

#C6C7CB

text

#05070B

muted

#7A7A7C

Preview Lab

Preview with #243B5A

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

Preview Lab → · Contrast checker → · Palette generator →