#243BA9#243BA9

#243BA9 is a dark, vivid blue. Relative luminance 0.064; OKLCH L 41.2% C 0.177 H 268.0°. Best body text is #FFFFFF at 9.24:1 contrast (WCAG AA passes).

Color values

HEX	#243BA9
RGB	rgb(36, 59, 169)
HSL	hsl(230, 65%, 40%)
HSV	hsv(230, 79%, 66%)
CMYK	cmyk(78.7%, 65.1%, 0%, 33.7%)
CIE-LAB	lab(30.32, 31.99, -61.27)
CIE-LCH	lch(30.32, 69.12, 297.57°)
OKLab	oklab(41.18% -0.006 -0.1773)
OKLCH	oklch(41.18% 0.177 268)
XYZ	xyz(9.4505, 6.3665, 38.2592)
Luminance	0.0637 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243BA9 #A99224

analogous

#247DA9 #243BA9 #4F24A9

triadic

#243BA9 #A9243B #3BA924

tetradic

#243BA9 #A9247D #A99224 #24A94F

square

#243BA9 #A9247D #A99224 #24A94F

split-complementary

#243BA9 #A94F24 #7DA924

monochromatic

#0F1844 #192977 #243BA9 #3651D4 #687DDF

Accessibility & contrast

On white

9.24

#243BA9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.27

#243BA9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243BA9

9.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243BA9	#FFFFFF	#000000	##FFFFFF
##243BA9	1.00	9.24	2.27	9.24
#FFFFFF	9.24	1.00	21.00	1.00
#000000	2.27	21.00	1.00	21.00
##FFFFFF	9.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EAD

Deuteranopia (green-blind)

#0041A7

Tritanopia (blue-blind)

#00586C

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #243ba9;
/* rgb */ color: rgb(36, 59, 169);
/* oklch */ color: oklch(41.2% 0.177 268.0);

Tailwind

colors: {
  custom: {
    50: '#7571c4',
    500: '#243ba9',
    950: '#000000',
  },
}

SCSS

$custom: #243ba9;
$custom-light: #7571c4;
$custom-dark: #000000;

JSON

{
  "hex": "#243ba9",
  "rgb": {
    "r": 36,
    "g": 59,
    "b": 169
  },
  "hsl": {
    "h": 229.624,
    "s": 64.878,
    "l": 40.196
  },
  "oklch": {
    "l": 0.41184,
    "c": 0.1774,
    "h": 268
  },
  "luminance": 0.06368
}

Semantic roles & 50–950 ramp

primary

#243BA9

secondary

#C5B464

accent

#CB40E8

background

#F7F6FC

surface

#EEECF8

border

#C9C7D1

text

#0A0713

muted

#7C7A82

Preview Lab

Preview with #243BA9

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

Preview Lab → · Contrast checker → · Palette generator →