#243DA4#243DA4

#243DA4 is a dark, vivid blue. Relative luminance 0.064; OKLCH L 41.1% C 0.168 H 267.6°. Best body text is #FFFFFF at 9.22:1 contrast (WCAG AA passes).

Color values

HEX	#243DA4
RGB	rgb(36, 61, 164)
HSL	hsl(228, 64%, 39%)
HSV	hsv(228, 78%, 64%)
CMYK	cmyk(78%, 62.8%, 0%, 35.7%)
CIE-LAB	lab(30.38, 28.78, -58.16)
CIE-LCH	lch(30.38, 64.89, 296.33°)
OKLab	oklab(41.09% -0.0071 -0.1682)
OKLCH	oklch(41.09% 0.168 267.6)
XYZ	xyz(9.0948, 6.3919, 35.8692)
Luminance	0.0639 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243DA4 #A48B24

analogous

#247DA4 #243DA4 #4B24A4

triadic

#243DA4 #A4243D #3DA424

tetradic

#243DA4 #A4247D #A48B24 #24A44B

square

#243DA4 #A4247D #A48B24 #24A44B

split-complementary

#243DA4 #A44B24 #7DA424

monochromatic

#0E1840 #192A72 #243DA4 #3352D2 #657DDD

Accessibility & contrast

On white

9.22

#243DA4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.28

#243DA4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243DA4

9.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243DA4	#FFFFFF	#000000	##FFFFFF
##243DA4	1.00	9.22	2.28	9.22
#FFFFFF	9.22	1.00	21.00	1.00
#000000	2.28	21.00	1.00	21.00
##FFFFFF	9.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EA7

Deuteranopia (green-blind)

#0042A2

Tritanopia (blue-blind)

#00586A

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #243da4;
/* rgb */ color: rgb(36, 61, 164);
/* oklch */ color: oklch(41.1% 0.168 267.6);

Tailwind

colors: {
  custom: {
    50: '#7472c0',
    500: '#243da4',
    950: '#000000',
  },
}

SCSS

$custom: #243da4;
$custom-light: #7472c0;
$custom-dark: #000000;

JSON

{
  "hex": "#243da4",
  "rgb": {
    "r": 36,
    "g": 61,
    "b": 164
  },
  "hsl": {
    "h": 228.281,
    "s": 64,
    "l": 39.216
  },
  "oklch": {
    "l": 0.41092,
    "c": 0.16833,
    "h": 267.6
  },
  "luminance": 0.06393
}

Semantic roles & 50–950 ramp

primary

#243DA4

secondary

#C3B061

accent

#C741E7

background

#F7F6FB

surface

#EEECF7

border

#C9C7D0

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #243DA4

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

Preview Lab → · Contrast checker → · Palette generator →