#243FAF#243FAF

#243FAF is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.5% C 0.181 H 267.3°. Best body text is #FFFFFF at 8.73:1 contrast (WCAG AA passes).

Color values

HEX	#243FAF
RGB	rgb(36, 63, 175)
HSL	hsl(228, 66%, 41%)
HSV	hsv(228, 79%, 69%)
CMYK	cmyk(79.4%, 64%, 0%, 31.4%)
CIE-LAB	lab(31.86, 31.62, -62.33)
CIE-LCH	lch(31.86, 69.89, 296.90°)
OKLab	oklab(42.49% -0.0085 -0.1804)
OKLCH	oklch(42.49% 0.181 267.3)
XYZ	xyz(10.2402, 7.0240, 41.3652)
Luminance	0.0703 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243FAF #AF9424

analogous

#2485AF #243FAF #4F24AF

triadic

#243FAF #AF243F #3FAF24

tetradic

#243FAF #AF2485 #AF9424 #24AF4F

square

#243FAF #AF2485 #AF9424 #24AF4F

split-complementary

#243FAF #AF4F24 #85AF24

monochromatic

#0F1A49 #1A2D7C #243FAF #3A58D6 #6D83E1

Accessibility & contrast

On white

8.73

#243FAF on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.41

#243FAF on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243FAF

8.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243FAF	#FFFFFF	#000000	##FFFFFF
##243FAF	1.00	8.73	2.41	8.73
#FFFFFF	8.73	1.00	21.00	1.00
#000000	2.41	21.00	1.00	21.00
##FFFFFF	8.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052B3

Deuteranopia (green-blind)

#0045AD

Tritanopia (blue-blind)

#005C71

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #243faf;
/* rgb */ color: rgb(36, 63, 175);
/* oklch */ color: oklch(42.5% 0.181 267.3);

Tailwind

colors: {
  custom: {
    50: '#7673c8',
    500: '#243faf',
    950: '#000000',
  },
}

SCSS

$custom: #243faf;
$custom-light: #7673c8;
$custom-dark: #000000;

JSON

{
  "hex": "#243faf",
  "rgb": {
    "r": 36,
    "g": 63,
    "b": 175
  },
  "hsl": {
    "h": 228.345,
    "s": 65.877,
    "l": 41.373
  },
  "oklch": {
    "l": 0.42486,
    "c": 0.18057,
    "h": 267.3
  },
  "luminance": 0.07025
}

Semantic roles & 50–950 ramp

primary

#243FAF

secondary

#C7B568

accent

#C83FE9

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #243FAF

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

Preview Lab → · Contrast checker → · Palette generator →