#243E8B#243E8B

#243E8B is a dark, vivid blue. Relative luminance 0.057; OKLCH L 39.1% C 0.132 H 266.3°. Best body text is #FFFFFF at 9.83:1 contrast (WCAG AA passes).

Color values

HEX	#243E8B
RGB	rgb(36, 62, 139)
HSL	hsl(225, 59%, 34%)
HSV	hsv(225, 74%, 55%)
CMYK	cmyk(74.1%, 55.4%, 0%, 45.5%)
CIE-LAB	lab(28.60, 18.42, -45.81)
CIE-LCH	lch(28.60, 49.37, 291.91°)
OKLab	oklab(39.12% -0.0086 -0.1319)
OKLCH	oklch(39.12% 0.132 266.3)
XYZ	xyz(7.1087, 5.6836, 25.1435)
Luminance	0.0568 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243E8B #8B7124

analogous

#24728B #243E8B #3D248B

triadic

#243E8B #8B243E #3E8B24

tetradic

#243E8B #8B2472 #8B7124 #248B3D

square

#243E8B #8B2472 #8B7124 #248B3D

split-complementary

#243E8B #8B3D24 #728B24

monochromatic

#0B132A #17285A #243E8B #3154BC #5676D3

Accessibility & contrast

On white

9.83

#243E8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.14

#243E8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243E8B

9.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243E8B	#FFFFFF	#000000	##FFFFFF
##243E8B	1.00	9.83	2.14	9.83
#FFFFFF	9.83	1.00	21.00	1.00
#000000	2.14	21.00	1.00	21.00
##FFFFFF	9.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#02488E

Deuteranopia (green-blind)

#003F89

Tritanopia (blue-blind)

#00515E

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #243e8b;
/* rgb */ color: rgb(36, 62, 139);
/* oklch */ color: oklch(39.1% 0.132 266.3);

Tailwind

colors: {
  custom: {
    50: '#6e72ad',
    500: '#243e8b',
    950: '#000000',
  },
}

SCSS

$custom: #243e8b;
$custom-light: #6e72ad;
$custom-dark: #000000;

JSON

{
  "hex": "#243e8b",
  "rgb": {
    "r": 36,
    "g": 62,
    "b": 139
  },
  "hsl": {
    "h": 224.854,
    "s": 58.857,
    "l": 34.314
  },
  "oklch": {
    "l": 0.3912,
    "c": 0.13215,
    "h": 266.3
  },
  "luminance": 0.05684
}

Semantic roles & 50–950 ramp

primary

#243E8B

secondary

#B79E53

accent

#BB46E2

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#080810

muted

#7B7B7F

Preview Lab

Preview with #243E8B

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

Preview Lab → · Contrast checker → · Palette generator →