#243C7B#243C7B

#243C7B is a dark, moderate blue. Relative luminance 0.050; OKLCH L 37.4% C 0.111 H 265.6°. Best body text is #FFFFFF at 10.46:1 contrast (WCAG AA passes).

Color values

HEX	#243C7B
RGB	rgb(36, 60, 123)
HSL	hsl(223, 55%, 31%)
HSV	hsv(223, 71%, 48%)
CMYK	cmyk(70.7%, 51.2%, 0%, 51.8%)
CIE-LAB	lab(26.84, 13.52, -38.67)
CIE-LCH	lch(26.84, 40.97, 289.27°)
OKLab	oklab(37.41% -0.0085 -0.1109)
OKLCH	oklch(37.41% 0.111 265.6)
XYZ	xyz(5.9173, 5.0363, 19.3953)
Luminance	0.0504 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243C7B #7B6324

analogous

#24677B #243C7B #37247B

triadic

#243C7B #7B243C #3C7B24

tetradic

#243C7B #7B2467 #7B6324 #247B37

square

#243C7B #7B2467 #7B6324 #247B37

split-complementary

#243C7B #7B3724 #677B24

monochromatic

#080E1C #16254C #243C7B #3253AA #4E71CB

Accessibility & contrast

On white

10.46

#243C7B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#243C7B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243C7B

10.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243C7B	#FFFFFF	#000000	##FFFFFF
##243C7B	1.00	10.46	2.01	10.46
#FFFFFF	10.46	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#19447D

Deuteranopia (green-blind)

#013C7A

Tritanopia (blue-blind)

#004B55

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #243c7b;
/* rgb */ color: rgb(36, 60, 123);
/* oklch */ color: oklch(37.4% 0.111 265.6);

Tailwind

colors: {
  custom: {
    50: '#6a71a2',
    500: '#243c7b',
    950: '#000000',
  },
}

SCSS

$custom: #243c7b;
$custom-light: #6a71a2;
$custom-dark: #000000;

JSON

{
  "hex": "#243c7b",
  "rgb": {
    "r": 36,
    "g": 60,
    "b": 123
  },
  "hsl": {
    "h": 223.448,
    "s": 54.717,
    "l": 31.176
  },
  "oklch": {
    "l": 0.37408,
    "c": 0.11125,
    "h": 265.6
  },
  "luminance": 0.05037
}

Semantic roles & 50–950 ramp

primary

#243C7B

secondary

#AD934D

accent

#B54ADE

background

#F6F6FA

surface

#ECECF3

border

#C7C7CD

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #243C7B

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

Preview Lab → · Contrast checker → · Palette generator →