#243B9A#243B9A

#243B9A is a dark, vivid blue. Relative luminance 0.058; OKLCH L 39.8% C 0.157 H 267.9°. Best body text is #FFFFFF at 9.69:1 contrast (WCAG AA passes).

Color values

HEX	#243B9A
RGB	rgb(36, 59, 154)
HSL	hsl(228, 62%, 37%)
HSV	hsv(228, 77%, 60%)
CMYK	cmyk(76.6%, 61.7%, 0%, 39.6%)
CIE-LAB	lab(28.99, 26.30, -54.37)
CIE-LCH	lch(28.99, 60.40, 295.81°)
OKLab	oklab(39.8% -0.0057 -0.1571)
OKLCH	oklch(39.8% 0.157 267.9)
XYZ	xyz(8.1222, 5.8352, 31.2638)
Luminance	0.0584 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243B9A #9A8324

analogous

#24769A #243B9A #48249A

triadic

#243B9A #9A243B #3B9A24

tetradic

#243B9A #9A2476 #9A8324 #249A48

square

#243B9A #9A2476 #9A8324 #249A48

split-complementary

#243B9A #9A4824 #769A24

monochromatic

#0D1537 #182868 #243B9A #304ECC #5F77DA

Accessibility & contrast

On white

9.69

#243B9A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.17

#243B9A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243B9A

9.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243B9A	#FFFFFF	#000000	##FFFFFF
##243B9A	1.00	9.69	2.17	9.69
#FFFFFF	9.69	1.00	21.00	1.00
#000000	2.17	21.00	1.00	21.00
##FFFFFF	9.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004A9D

Deuteranopia (green-blind)

#003F98

Tritanopia (blue-blind)

#005364

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #243b9a;
/* rgb */ color: rgb(36, 59, 154);
/* oklch */ color: oklch(39.8% 0.157 267.9);

Tailwind

colors: {
  custom: {
    50: '#7170b9',
    500: '#243b9a',
    950: '#000000',
  },
}

SCSS

$custom: #243b9a;
$custom-light: #7170b9;
$custom-dark: #000000;

JSON

{
  "hex": "#243b9a",
  "rgb": {
    "r": 36,
    "g": 59,
    "b": 154
  },
  "hsl": {
    "h": 228.305,
    "s": 62.105,
    "l": 37.255
  },
  "oklch": {
    "l": 0.39796,
    "c": 0.15718,
    "h": 267.9
  },
  "luminance": 0.05836
}

Semantic roles & 50–950 ramp

primary

#243B9A

secondary

#BFAB5B

accent

#C543E5

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090711

muted

#7B7A80

Preview Lab

Preview with #243B9A

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

Preview Lab → · Contrast checker → · Palette generator →