#243C9D#243C9D

#243C9D is a dark, vivid blue. Relative luminance 0.060; OKLCH L 40.3% C 0.160 H 267.7°. Best body text is #FFFFFF at 9.51:1 contrast (WCAG AA passes).

Color values

HEX	#243C9D
RGB	rgb(36, 60, 157)
HSL	hsl(228, 63%, 38%)
HSV	hsv(228, 77%, 62%)
CMYK	cmyk(77.1%, 61.8%, 0%, 38.4%)
CIE-LAB	lab(29.51, 26.78, -55.34)
CIE-LCH	lch(29.51, 61.48, 295.82°)
OKLab	oklab(40.26% -0.0064 -0.1599)
OKLCH	oklch(40.26% 0.16 267.7)
XYZ	xyz(8.4271, 6.0402, 32.6135)
Luminance	0.0604 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243C9D #9D8524

analogous

#24789D #243C9D #48249D

triadic

#243C9D #9D243C #3C9D24

tetradic

#243C9D #9D2478 #9D8524 #249D48

square

#243C9D #9D2478 #9D8524 #249D48

split-complementary

#243C9D #9D4824 #789D24

monochromatic

#0D1639 #19296B #243C9D #2F4FCF #6179DB

Accessibility & contrast

On white

9.51

#243C9D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.21

#243C9D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243C9D

9.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243C9D	#FFFFFF	#000000	##FFFFFF
##243C9D	1.00	9.51	2.21	9.51
#FFFFFF	9.51	1.00	21.00	1.00
#000000	2.21	21.00	1.00	21.00
##FFFFFF	9.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BA0

Deuteranopia (green-blind)

#00409B

Tritanopia (blue-blind)

#005566

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #243c9d;
/* rgb */ color: rgb(36, 60, 157);
/* oklch */ color: oklch(40.3% 0.160 267.7);

Tailwind

colors: {
  custom: {
    50: '#7271bb',
    500: '#243c9d',
    950: '#000000',
  },
}

SCSS

$custom: #243c9d;
$custom-light: #7271bb;
$custom-dark: #000000;

JSON

{
  "hex": "#243c9d",
  "rgb": {
    "r": 36,
    "g": 60,
    "b": 157
  },
  "hsl": {
    "h": 228.099,
    "s": 62.694,
    "l": 37.843
  },
  "oklch": {
    "l": 0.40262,
    "c": 0.16006,
    "h": 267.7
  },
  "luminance": 0.06041
}

Semantic roles & 50–950 ramp

primary

#243C9D

secondary

#C0AC5D

accent

#C542E6

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #243C9D

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

Preview Lab → · Contrast checker → · Palette generator →