#243DA8#243DA8

#243DA8 is a dark, vivid blue. Relative luminance 0.065; OKLCH L 41.5% C 0.174 H 267.6°. Best body text is #FFFFFF at 9.10:1 contrast (WCAG AA passes).

Color values

HEX	#243DA8
RGB	rgb(36, 61, 168)
HSL	hsl(229, 65%, 40%)
HSV	hsv(229, 79%, 66%)
CMYK	cmyk(78.6%, 63.7%, 0%, 34.1%)
CIE-LAB	lab(30.73, 30.30, -59.99)
CIE-LCH	lch(30.73, 67.21, 296.79°)
OKLab	oklab(41.46% -0.0072 -0.1735)
OKLCH	oklch(41.46% 0.174 267.6)
XYZ	xyz(9.4617, 6.5386, 37.8016)
Luminance	0.0654 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243DA8 #A88F24

analogous

#247FA8 #243DA8 #4D24A8

triadic

#243DA8 #A8243D #3DA824

tetradic

#243DA8 #A8247F #A88F24 #24A84D

square

#243DA8 #A8247F #A88F24 #24A84D

split-complementary

#243DA8 #A84D24 #7FA824

monochromatic

#0E1843 #192B76 #243DA8 #3553D4 #687EDF

Accessibility & contrast

On white

9.10

#243DA8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.31

#243DA8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243DA8

9.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243DA8	#FFFFFF	#000000	##FFFFFF
##243DA8	1.00	9.10	2.31	9.10
#FFFFFF	9.10	1.00	21.00	1.00
#000000	2.31	21.00	1.00	21.00
##FFFFFF	9.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FAB

Deuteranopia (green-blind)

#0042A6

Tritanopia (blue-blind)

#00596C

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #243da8;
/* rgb */ color: rgb(36, 61, 168);
/* oklch */ color: oklch(41.5% 0.174 267.6);

Tailwind

colors: {
  custom: {
    50: '#7572c3',
    500: '#243da8',
    950: '#000000',
  },
}

SCSS

$custom: #243da8;
$custom-light: #7572c3;
$custom-dark: #000000;

JSON

{
  "hex": "#243da8",
  "rgb": {
    "r": 36,
    "g": 61,
    "b": 168
  },
  "hsl": {
    "h": 228.636,
    "s": 64.706,
    "l": 40
  },
  "oklch": {
    "l": 0.41461,
    "c": 0.17369,
    "h": 267.6
  },
  "luminance": 0.0654
}

Semantic roles & 50–950 ramp

primary

#243DA8

secondary

#C4B263

accent

#C840E8

background

#F7F6FC

surface

#EEECF8

border

#C9C7D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #243DA8

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

Preview Lab → · Contrast checker → · Palette generator →