#243D9E#243D9E

#243D9E is a dark, vivid blue. Relative luminance 0.062; OKLCH L 40.5% C 0.160 H 267.5°. Best body text is #FFFFFF at 9.39:1 contrast (WCAG AA passes).

Color values

HEX	#243D9E
RGB	rgb(36, 61, 158)
HSL	hsl(228, 63%, 38%)
HSV	hsv(228, 77%, 62%)
CMYK	cmyk(77.2%, 61.4%, 0%, 38%)
CIE-LAB	lab(29.86, 26.49, -55.38)
CIE-LCH	lch(29.86, 61.39, 295.56°)
OKLab	oklab(40.55% -0.0071 -0.16)
OKLCH	oklch(40.55% 0.16 267.5)
XYZ	xyz(8.5657, 6.1802, 33.0826)
Luminance	0.0618 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243D9E #9E8524

analogous

#247A9E #243D9E #48249E

triadic

#243D9E #9E243D #3D9E24

tetradic

#243D9E #9E247A #9E8524 #249E48

square

#243D9E #9E247A #9E8524 #249E48

split-complementary

#243D9E #9E4824 #7A9E24

monochromatic

#0D173A #192A6C #243D9E #2F50D0 #617ADB

Accessibility & contrast

On white

9.39

#243D9E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.24

#243D9E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243D9E

9.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243D9E	#FFFFFF	#000000	##FFFFFF
##243D9E	1.00	9.39	2.24	9.39
#FFFFFF	9.39	1.00	21.00	1.00
#000000	2.24	21.00	1.00	21.00
##FFFFFF	9.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CA1

Deuteranopia (green-blind)

#00419C

Tritanopia (blue-blind)

#005667

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #243d9e;
/* rgb */ color: rgb(36, 61, 158);
/* oklch */ color: oklch(40.5% 0.160 267.5);

Tailwind

colors: {
  custom: {
    50: '#7272bb',
    500: '#243d9e',
    950: '#000000',
  },
}

SCSS

$custom: #243d9e;
$custom-light: #7272bb;
$custom-dark: #000000;

JSON

{
  "hex": "#243d9e",
  "rgb": {
    "r": 36,
    "g": 61,
    "b": 158
  },
  "hsl": {
    "h": 227.705,
    "s": 62.887,
    "l": 38.039
  },
  "oklch": {
    "l": 0.40548,
    "c": 0.16018,
    "h": 267.5
  },
  "luminance": 0.06181
}

Semantic roles & 50–950 ramp

primary

#243D9E

secondary

#C0AC5E

accent

#C442E6

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #243D9E

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

Preview Lab → · Contrast checker → · Palette generator →