#243F9C#243F9C

#243F9C is a dark, vivid blue. Relative luminance 0.063; OKLCH L 40.8% C 0.155 H 266.8°. Best body text is #FFFFFF at 9.27:1 contrast (WCAG AA passes).

Color values

HEX	#243F9C
RGB	rgb(36, 63, 156)
HSL	hsl(227, 63%, 38%)
HSV	hsv(227, 77%, 61%)
CMYK	cmyk(76.9%, 59.6%, 0%, 38.8%)
CIE-LAB	lab(30.23, 24.37, -53.57)
CIE-LCH	lch(30.23, 58.85, 294.46°)
OKLab	oklab(40.77% -0.0085 -0.1547)
OKLCH	oklch(40.77% 0.155 266.8)
XYZ	xyz(8.5037, 6.3294, 32.2196)
Luminance	0.0633 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243F9C #9C8124

analogous

#247B9C #243F9C #45249C

triadic

#243F9C #9C243F #3F9C24

tetradic

#243F9C #9C247B #9C8124 #249C45

square

#243F9C #9C247B #9C8124 #249C45

split-complementary

#243F9C #9C4524 #7B9C24

monochromatic

#0D1739 #192B6A #243F9C #2F53CE #607CDA

Accessibility & contrast

On white

9.27

#243F9C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.27

#243F9C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243F9C

9.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243F9C	#FFFFFF	#000000	##FFFFFF
##243F9C	1.00	9.27	2.27	9.27
#FFFFFF	9.27	1.00	21.00	1.00
#000000	2.27	21.00	1.00	21.00
##FFFFFF	9.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004D9F

Deuteranopia (green-blind)

#00429A

Tritanopia (blue-blind)

#005667

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #243f9c;
/* rgb */ color: rgb(36, 63, 156);
/* oklch */ color: oklch(40.8% 0.155 266.8);

Tailwind

colors: {
  custom: {
    50: '#7273ba',
    500: '#243f9c',
    950: '#000000',
  },
}

SCSS

$custom: #243f9c;
$custom-light: #7273ba;
$custom-dark: #000000;

JSON

{
  "hex": "#243f9c",
  "rgb": {
    "r": 36,
    "g": 63,
    "b": 156
  },
  "hsl": {
    "h": 226.5,
    "s": 62.5,
    "l": 37.647
  },
  "oklch": {
    "l": 0.40769,
    "c": 0.15491,
    "h": 266.8
  },
  "luminance": 0.0633
}

Semantic roles & 50–950 ramp

primary

#243F9C

secondary

#BFA95C

accent

#C142E6

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #243F9C

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

Preview Lab → · Contrast checker → · Palette generator →