#243DA6#243DA6

#243DA6 is a dark, vivid blue. Relative luminance 0.065; OKLCH L 41.3% C 0.171 H 267.6°. Best body text is #FFFFFF at 9.16:1 contrast (WCAG AA passes).

Color values

HEX	#243DA6
RGB	rgb(36, 61, 166)
HSL	hsl(228, 64%, 40%)
HSV	hsv(228, 78%, 65%)
CMYK	cmyk(78.3%, 63.3%, 0%, 34.9%)
CIE-LAB	lab(30.56, 29.54, -59.08)
CIE-LCH	lch(30.56, 66.05, 296.56°)
OKLab	oklab(41.28% -0.0071 -0.1709)
OKLCH	oklch(41.28% 0.171 267.6)
XYZ	xyz(9.2768, 6.4647, 36.8279)
Luminance	0.0647 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243DA6 #A68D24

analogous

#247EA6 #243DA6 #4C24A6

triadic

#243DA6 #A6243D #3DA624

tetradic

#243DA6 #A6247E #A68D24 #24A64C

square

#243DA6 #A6247E #A68D24 #24A64C

split-complementary

#243DA6 #A64C24 #7EA624

monochromatic

#0E1841 #192B74 #243DA6 #3453D3 #667DDE

Accessibility & contrast

On white

9.16

#243DA6 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.29

#243DA6 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243DA6

9.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243DA6	#FFFFFF	#000000	##FFFFFF
##243DA6	1.00	9.16	2.29	9.16
#FFFFFF	9.16	1.00	21.00	1.00
#000000	2.29	21.00	1.00	21.00
##FFFFFF	9.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EA9

Deuteranopia (green-blind)

#0042A4

Tritanopia (blue-blind)

#00586B

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #243da6;
/* rgb */ color: rgb(36, 61, 166);
/* oklch */ color: oklch(41.3% 0.171 267.6);

Tailwind

colors: {
  custom: {
    50: '#7472c1',
    500: '#243da6',
    950: '#000000',
  },
}

SCSS

$custom: #243da6;
$custom-light: #7472c1;
$custom-dark: #000000;

JSON

{
  "hex": "#243da6",
  "rgb": {
    "r": 36,
    "g": 61,
    "b": 166
  },
  "hsl": {
    "h": 228.462,
    "s": 64.356,
    "l": 39.608
  },
  "oklch": {
    "l": 0.41276,
    "c": 0.17102,
    "h": 267.6
  },
  "luminance": 0.06466
}

Semantic roles & 50–950 ramp

primary

#243DA6

secondary

#C4B162

accent

#C740E7

background

#F7F6FC

surface

#EEECF8

border

#C9C7D1

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #243DA6

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

Preview Lab → · Contrast checker → · Palette generator →