#243D7B#243D7B

#243D7B is a dark, moderate blue. Relative luminance 0.051; OKLCH L 37.6% C 0.110 H 265.0°. Best body text is #FFFFFF at 10.35:1 contrast (WCAG AA passes).

Color values

HEX	#243D7B
RGB	rgb(36, 61, 123)
HSL	hsl(223, 55%, 31%)
HSV	hsv(223, 71%, 48%)
CMYK	cmyk(70.7%, 50.4%, 0%, 51.8%)
CIE-LAB	lab(27.14, 12.83, -38.19)
CIE-LCH	lch(27.14, 40.29, 288.56°)
OKLab	oklab(37.64% -0.0095 -0.1095)
OKLCH	oklch(37.64% 0.11 265)
XYZ	xyz(5.9702, 5.1420, 19.4129)
Luminance	0.0514 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243D7B #7B6224

analogous

#24687B #243D7B #36247B

triadic

#243D7B #7B243D #3D7B24

tetradic

#243D7B #7B2468 #7B6224 #247B36

square

#243D7B #7B2468 #7B6224 #247B36

split-complementary

#243D7B #7B3624 #687B24

monochromatic

#080E1C #16264C #243D7B #3254AA #4E72CB

Accessibility & contrast

On white

10.35

#243D7B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.03

#243D7B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243D7B

10.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243D7B	#FFFFFF	#000000	##FFFFFF
##243D7B	1.00	10.35	2.03	10.35
#FFFFFF	10.35	1.00	21.00	1.00
#000000	2.03	21.00	1.00	21.00
##FFFFFF	10.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B447D

Deuteranopia (green-blind)

#053C7A

Tritanopia (blue-blind)

#004B56

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #243d7b;
/* rgb */ color: rgb(36, 61, 123);
/* oklch */ color: oklch(37.6% 0.110 265.0);

Tailwind

colors: {
  custom: {
    50: '#6a72a2',
    500: '#243d7b',
    950: '#000000',
  },
}

SCSS

$custom: #243d7b;
$custom-light: #6a72a2;
$custom-dark: #000000;

JSON

{
  "hex": "#243d7b",
  "rgb": {
    "r": 36,
    "g": 61,
    "b": 123
  },
  "hsl": {
    "h": 222.759,
    "s": 54.717,
    "l": 31.176
  },
  "oklch": {
    "l": 0.37635,
    "c": 0.1099,
    "h": 265
  },
  "luminance": 0.05143
}

Semantic roles & 50–950 ramp

primary

#243D7B

secondary

#AD924D

accent

#B34ADE

background

#F6F6FA

surface

#ECECF3

border

#C7C7CD

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #243D7B

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

Preview Lab → · Contrast checker → · Palette generator →