#243B8F#243B8F

#243B8F is a dark, vivid blue. Relative luminance 0.055; OKLCH L 38.8% C 0.142 H 267.6°. Best body text is #FFFFFF at 10.01:1 contrast (WCAG AA passes).

Color values

HEX	#243B8F
RGB	rgb(36, 59, 143)
HSL	hsl(227, 60%, 35%)
HSV	hsv(227, 75%, 56%)
CMYK	cmyk(74.8%, 58.7%, 0%, 43.9%)
CIE-LAB	lab(28.08, 22.05, -49.13)
CIE-LCH	lch(28.08, 53.85, 294.17°)
OKLab	oklab(38.82% -0.0059 -0.1417)
OKLCH	oklch(38.82% 0.142 267.6)
XYZ	xyz(7.2477, 5.4854, 26.6581)
Luminance	0.0549 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243B8F #8F7824

analogous

#24708F #243B8F #43248F

triadic

#243B8F #8F243B #3B8F24

tetradic

#243B8F #8F2470 #8F7824 #248F43

square

#243B8F #8F2470 #8F7824 #248F43

split-complementary

#243B8F #8F4324 #708F24

monochromatic

#0B132D #18275E #243B8F #304FC0 #5873D5

Accessibility & contrast

On white

10.01

#243B8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.10

#243B8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243B8F

10.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243B8F	#FFFFFF	#000000	##FFFFFF
##243B8F	1.00	10.01	2.10	10.01
#FFFFFF	10.01	1.00	21.00	1.00
#000000	2.10	21.00	1.00	21.00
##FFFFFF	10.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004792

Deuteranopia (green-blind)

#003D8D

Tritanopia (blue-blind)

#00505F

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #243b8f;
/* rgb */ color: rgb(36, 59, 143);
/* oklch */ color: oklch(38.8% 0.142 267.6);

Tailwind

colors: {
  custom: {
    50: '#6f70b0',
    500: '#243b8f',
    950: '#000000',
  },
}

SCSS

$custom: #243b8f;
$custom-light: #6f70b0;
$custom-dark: #000000;

JSON

{
  "hex": "#243b8f",
  "rgb": {
    "r": 36,
    "g": 59,
    "b": 143
  },
  "hsl": {
    "h": 227.103,
    "s": 59.777,
    "l": 35.098
  },
  "oklch": {
    "l": 0.38825,
    "c": 0.14181,
    "h": 267.6
  },
  "luminance": 0.05486
}

Semantic roles & 50–950 ramp

primary

#243B8F

secondary

#B9A455

accent

#C145E3

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#080711

muted

#7B7A80

Preview Lab

Preview with #243B8F

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

Preview Lab → · Contrast checker → · Palette generator →