#243C63#243C63

#243C63 is a dark, moderate blue. Relative luminance 0.045; OKLCH L 35.7% C 0.074 H 259.7°. Best body text is #FFFFFF at 11.04:1 contrast (WCAG AA passes).

Color values

HEX	#243C63
RGB	rgb(36, 60, 99)
HSL	hsl(217, 47%, 26%)
HSV	hsv(217, 64%, 39%)
CMYK	cmyk(63.6%, 39.4%, 0%, 61.2%)
CIE-LAB	lab(25.28, 4.20, -25.84)
CIE-LCH	lch(25.28, 26.18, 279.24°)
OKLab	oklab(35.71% -0.0133 -0.0733)
OKLCH	oklch(35.71% 0.074 259.7)
XYZ	xyz(4.5948, 4.5072, 12.4298)
Luminance	0.0451 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243C63 #634B24

analogous

#245C63 #243C63 #2C2463

triadic

#243C63 #63243C #3C6324

tetradic

#243C63 #63245C #634B24 #24632C

square

#243C63 #63245C #634B24 #24632C

split-complementary

#243C63 #632C24 #5C6324

monochromatic

#080E16 #142136 #243C63 #345790 #4673BC

Accessibility & contrast

On white

11.04

#243C63 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.90

#243C63 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243C63

11.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243C63	#FFFFFF	#000000	##FFFFFF
##243C63	1.00	11.04	1.90	11.04
#FFFFFF	11.04	1.00	21.00	1.00
#000000	1.90	21.00	1.00	21.00
##FFFFFF	11.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2C3F65

Deuteranopia (green-blind)

#233962

Tritanopia (blue-blind)

#00454A

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #243c63;
/* rgb */ color: rgb(36, 60, 99);
/* oklch */ color: oklch(35.7% 0.074 259.7);

Tailwind

colors: {
  custom: {
    50: '#65718f',
    500: '#243c63',
    950: '#000000',
  },
}

SCSS

$custom: #243c63;
$custom-light: #65718f;
$custom-dark: #000000;

JSON

{
  "hex": "#243c63",
  "rgb": {
    "r": 36,
    "g": 60,
    "b": 99
  },
  "hsl": {
    "h": 217.143,
    "s": 46.667,
    "l": 26.471
  },
  "oklch": {
    "l": 0.35708,
    "c": 0.07446,
    "h": 259.7
  },
  "luminance": 0.04508
}

Semantic roles & 50–950 ramp

primary

#243C63

secondary

#967A4C

accent

#A451D6

background

#F6F6F8

surface

#EBECF0

border

#C6C7CB

text

#06070C

muted

#7A7A7D

Preview Lab

Preview with #243C63

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

Preview Lab → · Contrast checker → · Palette generator →