#243C70#243C70

#243C70 is a dark, moderate blue. Relative luminance 0.048; OKLCH L 36.6% C 0.095 H 263.7°. Best body text is #FFFFFF at 10.74:1 contrast (WCAG AA passes).

Color values

HEX	#243C70
RGB	rgb(36, 60, 112)
HSL	hsl(221, 51%, 29%)
HSV	hsv(221, 68%, 44%)
CMYK	cmyk(67.9%, 46.4%, 0%, 56.1%)
CIE-LAB	lab(26.09, 9.21, -32.91)
CIE-LCH	lch(26.09, 34.18, 285.64°)
OKLab	oklab(36.59% -0.0103 -0.094)
OKLCH	oklch(36.59% 0.095 263.7)
XYZ	xyz(5.2670, 4.7761, 15.9704)
Luminance	0.0478 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243C70 #705824

analogous

#246270 #243C70 #322470

triadic

#243C70 #70243C #3C7024

tetradic

#243C70 #702462 #705824 #247032

square

#243C70 #702462 #705824 #247032

split-complementary

#243C70 #703224 #627024

monochromatic

#070C17 #152342 #243C70 #33559E #4A71C5

Accessibility & contrast

On white

10.74

#243C70 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.96

#243C70 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243C70

10.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243C70	#FFFFFF	#000000	##FFFFFF
##243C70	1.00	10.74	1.96	10.74
#FFFFFF	10.74	1.00	21.00	1.00
#000000	1.96	21.00	1.00	21.00
##FFFFFF	10.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#234172

Deuteranopia (green-blind)

#173A6F

Tritanopia (blue-blind)

#004850

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #243c70;
/* rgb */ color: rgb(36, 60, 112);
/* oklch */ color: oklch(36.6% 0.095 263.7);

Tailwind

colors: {
  custom: {
    50: '#687199',
    500: '#243c70',
    950: '#000000',
  },
}

SCSS

$custom: #243c70;
$custom-light: #687199;
$custom-dark: #000000;

JSON

{
  "hex": "#243c70",
  "rgb": {
    "r": 36,
    "g": 60,
    "b": 112
  },
  "hsl": {
    "h": 221.053,
    "s": 51.351,
    "l": 29.02
  },
  "oklch": {
    "l": 0.36592,
    "c": 0.09453,
    "h": 263.7
  },
  "luminance": 0.04777
}

Semantic roles & 50–950 ramp

primary

#243C70

secondary

#A3884D

accent

#AE4DDB

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#07070E

muted

#7A7A7E

Preview Lab

Preview with #243C70

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

Preview Lab → · Contrast checker → · Palette generator →