#243A9B#243A9B

#243A9B is a dark, vivid blue. Relative luminance 0.058; OKLCH L 39.7% C 0.160 H 268.2°. Best body text is #FFFFFF at 9.75:1 contrast (WCAG AA passes).

Color values

HEX	#243A9B
RGB	rgb(36, 58, 155)
HSL	hsl(229, 62%, 37%)
HSV	hsv(229, 77%, 61%)
CMYK	cmyk(76.8%, 62.6%, 0%, 39.2%)
CIE-LAB	lab(28.82, 27.35, -55.27)
CIE-LCH	lch(28.82, 61.67, 296.33°)
OKLab	oklab(39.69% -0.0051 -0.1597)
OKLCH	oklch(39.69% 0.16 268.2)
XYZ	xyz(8.1550, 5.7668, 31.6873)
Luminance	0.0577 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243A9B #9B8524

analogous

#24759B #243A9B #4A249B

triadic

#243A9B #9B243A #3A9B24

tetradic

#243A9B #9B2475 #9B8524 #249B4A

square

#243A9B #9B2475 #9B8524 #249B4A

split-complementary

#243A9B #9B4A24 #759B24

monochromatic

#0D1538 #182769 #243A9B #304DCD #5F76DA

Accessibility & contrast

On white

9.75

#243A9B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.15

#243A9B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243A9B

9.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243A9B	#FFFFFF	#000000	##FFFFFF
##243A9B	1.00	9.75	2.15	9.75
#FFFFFF	9.75	1.00	21.00	1.00
#000000	2.15	21.00	1.00	21.00
##FFFFFF	9.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004A9E

Deuteranopia (green-blind)

#003F99

Tritanopia (blue-blind)

#005365

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #243a9b;
/* rgb */ color: rgb(36, 58, 155);
/* oklch */ color: oklch(39.7% 0.160 268.2);

Tailwind

colors: {
  custom: {
    50: '#7270b9',
    500: '#243a9b',
    950: '#000000',
  },
}

SCSS

$custom: #243a9b;
$custom-light: #7270b9;
$custom-dark: #000000;

JSON

{
  "hex": "#243a9b",
  "rgb": {
    "r": 36,
    "g": 58,
    "b": 155
  },
  "hsl": {
    "h": 228.908,
    "s": 62.304,
    "l": 37.451
  },
  "oklch": {
    "l": 0.39692,
    "c": 0.15981,
    "h": 268.2
  },
  "luminance": 0.05768
}

Semantic roles & 50–950 ramp

primary

#243A9B

secondary

#BFAD5C

accent

#C742E5

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #243A9B

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

Preview Lab → · Contrast checker → · Palette generator →