#243C71#243C71

#243C71 is a dark, moderate blue. Relative luminance 0.048; OKLCH L 36.7% C 0.096 H 263.9°. Best body text is #FFFFFF at 10.72:1 contrast (WCAG AA passes).

Color values

HEX	#243C71
RGB	rgb(36, 60, 113)
HSL	hsl(221, 52%, 29%)
HSV	hsv(221, 68%, 44%)
CMYK	cmyk(68.1%, 46.9%, 0%, 55.7%)
CIE-LAB	lab(26.15, 9.60, -33.44)
CIE-LCH	lch(26.15, 34.79, 286.02°)
OKLab	oklab(36.66% -0.0101 -0.0955)
OKLCH	oklch(36.66% 0.096 263.9)
XYZ	xyz(5.3230, 4.7985, 16.2653)
Luminance	0.0480 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243C71 #715924

analogous

#246371 #243C71 #332471

triadic

#243C71 #71243C #3C7124

tetradic

#243C71 #712463 #715924 #247133

square

#243C71 #712463 #715924 #247133

split-complementary

#243C71 #713324 #637124

monochromatic

#070C17 #152343 #243C71 #33559F #4A70C5

Accessibility & contrast

On white

10.72

#243C71 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.96

#243C71 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243C71

10.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243C71	#FFFFFF	#000000	##FFFFFF
##243C71	1.00	10.72	1.96	10.72
#FFFFFF	10.72	1.00	21.00	1.00
#000000	1.96	21.00	1.00	21.00
##FFFFFF	10.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#234273

Deuteranopia (green-blind)

#153B70

Tritanopia (blue-blind)

#004851

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #243c71;
/* rgb */ color: rgb(36, 60, 113);
/* oklch */ color: oklch(36.7% 0.096 263.9);

Tailwind

colors: {
  custom: {
    50: '#68719a',
    500: '#243c71',
    950: '#000000',
  },
}

SCSS

$custom: #243c71;
$custom-light: #68719a;
$custom-dark: #000000;

JSON

{
  "hex": "#243c71",
  "rgb": {
    "r": 36,
    "g": 60,
    "b": 113
  },
  "hsl": {
    "h": 221.299,
    "s": 51.678,
    "l": 29.216
  },
  "oklch": {
    "l": 0.36663,
    "c": 0.09608,
    "h": 263.9
  },
  "luminance": 0.04799
}

Semantic roles & 50–950 ramp

primary

#243C71

secondary

#A4894D

accent

#AF4DDB

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#07070E

muted

#7A7A7E

Preview Lab

Preview with #243C71

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

Preview Lab → · Contrast checker → · Palette generator →