#243C7B#243C7B

#243C7B is a dark, moderate blue. Relative luminance 0.050; OKLCH L 37.4% C 0.111 H 265.6°. Best body text is #FFFFFF at 10.46:1 contrast (WCAG AA passes).

Color values

HEX#243C7B
RGBrgb(36, 60, 123)
HSLhsl(223, 55%, 31%)
HSVhsv(223, 71%, 48%)
CMYKcmyk(70.7%, 51.2%, 0%, 51.8%)
CIE-LABlab(26.84, 13.52, -38.67)
CIE-LCHlch(26.84, 40.97, 289.27°)
OKLaboklab(37.41% -0.0085 -0.1109)
OKLCHoklch(37.41% 0.111 265.6)
XYZxyz(5.9173, 5.0363, 19.3953)
Luminance0.0504 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#243C7B #7B6324
analogous
#24677B #243C7B #37247B
triadic
#243C7B #7B243C #3C7B24
tetradic
#243C7B #7B2467 #7B6324 #247B37
square
#243C7B #7B2467 #7B6324 #247B37
split-complementary
#243C7B #7B3724 #677B24
monochromatic
#080E1C #16254C #243C7B #3253AA #4E71CB

Accessibility & contrast

On white

10.46
#243C7B on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

2.01
#243C7B on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243C7B
10.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##243C7B#FFFFFF#000000##FFFFFF
##243C7B1.0010.462.0110.46
#FFFFFF10.461.0021.001.00
#0000002.0121.001.0021.00
##FFFFFF10.461.0021.001.00

Color blindness preview

Protanopia (red-blind)
#19447D
Deuteranopia (green-blind)
#013C7A
Tritanopia (blue-blind)
#004B55
Achromatopsia (no color)
#3F3F3F

Design tokens & code

CSS
--color: #243c7b;
/* rgb */ color: rgb(36, 60, 123);
/* oklch */ color: oklch(37.4% 0.111 265.6);
Tailwind
colors: {
  custom: {
    50: '#6a71a2',
    500: '#243c7b',
    950: '#000000',
  },
}
SCSS
$custom: #243c7b;
$custom-light: #6a71a2;
$custom-dark: #000000;
JSON
{
  "hex": "#243c7b",
  "rgb": {
    "r": 36,
    "g": 60,
    "b": 123
  },
  "hsl": {
    "h": 223.448,
    "s": 54.717,
    "l": 31.176
  },
  "oklch": {
    "l": 0.37408,
    "c": 0.11125,
    "h": 265.6
  },
  "luminance": 0.05037
}

Semantic roles & 50–950 ramp

primary
#243C7B
secondary
#AD934D
accent
#B54ADE
background
#F6F6FA
surface
#ECECF3
border
#C7C7CD
text
#07070F
muted
#7A7A7F

Preview Lab

Preview with #243C7B

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

Preview Lab → · Contrast checker → · Palette generator →

#243C7B Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva