#243C6F#243C6F

#243C6F is a dark, moderate blue. Relative luminance 0.048; OKLCH L 36.5% C 0.093 H 263.5°. Best body text is #FFFFFF at 10.76:1 contrast (WCAG AA passes).

Color values

HEX	#243C6F
RGB	rgb(36, 60, 111)
HSL	hsl(221, 51%, 29%)
HSV	hsv(221, 68%, 44%)
CMYK	cmyk(67.6%, 45.9%, 0%, 56.5%)
CIE-LAB	lab(26.02, 8.83, -32.38)
CIE-LCH	lch(26.02, 33.56, 285.25°)
OKLab	oklab(36.52% -0.0105 -0.0924)
OKLCH	oklch(36.52% 0.093 263.5)
XYZ	xyz(5.2117, 4.7540, 15.6788)
Luminance	0.0475 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243C6F #6F5724

analogous

#24626F #243C6F #32246F

triadic

#243C6F #6F243C #3C6F24

tetradic

#243C6F #6F2462 #6F5724 #246F32

square

#243C6F #6F2462 #6F5724 #246F32

split-complementary

#243C6F #6F3224 #626F24

monochromatic

#070C17 #152341 #243C6F #33559D #4971C4

Accessibility & contrast

On white

10.76

#243C6F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.95

#243C6F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243C6F

10.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243C6F	#FFFFFF	#000000	##FFFFFF
##243C6F	1.00	10.76	1.95	10.76
#FFFFFF	10.76	1.00	21.00	1.00
#000000	1.95	21.00	1.00	21.00
##FFFFFF	10.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#244171

Deuteranopia (green-blind)

#183A6E

Tritanopia (blue-blind)

#004850

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #243c6f;
/* rgb */ color: rgb(36, 60, 111);
/* oklch */ color: oklch(36.5% 0.093 263.5);

Tailwind

colors: {
  custom: {
    50: '#677199',
    500: '#243c6f',
    950: '#000000',
  },
}

SCSS

$custom: #243c6f;
$custom-light: #677199;
$custom-dark: #000000;

JSON

{
  "hex": "#243c6f",
  "rgb": {
    "r": 36,
    "g": 60,
    "b": 111
  },
  "hsl": {
    "h": 220.8,
    "s": 51.02,
    "l": 28.824
  },
  "oklch": {
    "l": 0.36521,
    "c": 0.09301,
    "h": 263.5
  },
  "luminance": 0.04754
}

Semantic roles & 50–950 ramp

primary

#243C6F

secondary

#A2874D

accent

#AD4DDA

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #243C6F

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

Preview Lab → · Contrast checker → · Palette generator →