#243C8C#243C8C

#243C8C is a dark, vivid blue. Relative luminance 0.055; OKLCH L 38.8% C 0.136 H 267.1°. Best body text is #FFFFFF at 10.00:1 contrast (WCAG AA passes).

Color values

HEX	#243C8C
RGB	rgb(36, 60, 140)
HSL	hsl(226, 59%, 35%)
HSV	hsv(226, 74%, 55%)
CMYK	cmyk(74.3%, 57.1%, 0%, 45.1%)
CIE-LAB	lab(28.11, 20.19, -47.21)
CIE-LCH	lch(28.11, 51.35, 293.15°)
OKLab	oklab(38.78% -0.0069 -0.136)
OKLCH	oklch(38.78% 0.136 267.1)
XYZ	xyz(7.0754, 5.4995, 25.4945)
Luminance	0.0550 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243C8C #8C7424

analogous

#24708C #243C8C #40248C

triadic

#243C8C #8C243C #3C8C24

tetradic

#243C8C #8C2470 #8C7424 #248C40

square

#243C8C #8C2470 #8C7424 #248C40

split-complementary

#243C8C #8C4024 #708C24

monochromatic

#0B122B #17275B #243C8C #3151BD #5774D4

Accessibility & contrast

On white

10.00

#243C8C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.10

#243C8C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243C8C

10.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243C8C	#FFFFFF	#000000	##FFFFFF
##243C8C	1.00	10.00	2.10	10.00
#FFFFFF	10.00	1.00	21.00	1.00
#000000	2.10	21.00	1.00	21.00
##FFFFFF	10.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00478F

Deuteranopia (green-blind)

#003E8A

Tritanopia (blue-blind)

#00505E

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #243c8c;
/* rgb */ color: rgb(36, 60, 140);
/* oklch */ color: oklch(38.8% 0.136 267.1);

Tailwind

colors: {
  custom: {
    50: '#6e71ae',
    500: '#243c8c',
    950: '#000000',
  },
}

SCSS

$custom: #243c8c;
$custom-light: #6e71ae;
$custom-dark: #000000;

JSON

{
  "hex": "#243c8c",
  "rgb": {
    "r": 36,
    "g": 60,
    "b": 140
  },
  "hsl": {
    "h": 226.154,
    "s": 59.091,
    "l": 34.51
  },
  "oklch": {
    "l": 0.38778,
    "c": 0.13622,
    "h": 267.1
  },
  "luminance": 0.055
}

Semantic roles & 50–950 ramp

primary

#243C8C

secondary

#B8A154

accent

#BE46E2

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #243C8C

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

Preview Lab → · Contrast checker → · Palette generator →