#243C9B#243C9B

#243C9B is a dark, vivid blue. Relative luminance 0.060; OKLCH L 40.1% C 0.157 H 267.7°. Best body text is #FFFFFF at 9.57:1 contrast (WCAG AA passes).

Color values

HEX	#243C9B
RGB	rgb(36, 60, 155)
HSL	hsl(228, 62%, 37%)
HSV	hsv(228, 77%, 61%)
CMYK	cmyk(76.8%, 61.3%, 0%, 39.2%)
CIE-LAB	lab(29.34, 26.01, -54.41)
CIE-LCH	lch(29.34, 60.30, 295.55°)
OKLab	oklab(40.08% -0.0064 -0.1572)
OKLCH	oklch(40.08% 0.157 267.7)
XYZ	xyz(8.2578, 5.9724, 31.7216)
Luminance	0.0597 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243C9B #9B8324

analogous

#24789B #243C9B #47249B

triadic

#243C9B #9B243C #3C9B24

tetradic

#243C9B #9B2478 #9B8324 #249B47

square

#243C9B #9B2478 #9B8324 #249B47

split-complementary

#243C9B #9B4724 #789B24

monochromatic

#0D1638 #182969 #243C9B #304FCD #5F78DA

Accessibility & contrast

On white

9.57

#243C9B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.19

#243C9B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243C9B

9.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243C9B	#FFFFFF	#000000	##FFFFFF
##243C9B	1.00	9.57	2.19	9.57
#FFFFFF	9.57	1.00	21.00	1.00
#000000	2.19	21.00	1.00	21.00
##FFFFFF	9.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004B9E

Deuteranopia (green-blind)

#004099

Tritanopia (blue-blind)

#005465

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #243c9b;
/* rgb */ color: rgb(36, 60, 155);
/* oklch */ color: oklch(40.1% 0.157 267.7);

Tailwind

colors: {
  custom: {
    50: '#7271b9',
    500: '#243c9b',
    950: '#000000',
  },
}

SCSS

$custom: #243c9b;
$custom-light: #7271b9;
$custom-dark: #000000;

JSON

{
  "hex": "#243c9b",
  "rgb": {
    "r": 36,
    "g": 60,
    "b": 155
  },
  "hsl": {
    "h": 227.899,
    "s": 62.304,
    "l": 37.451
  },
  "oklch": {
    "l": 0.40082,
    "c": 0.15731,
    "h": 267.7
  },
  "luminance": 0.05973
}

Semantic roles & 50–950 ramp

primary

#243C9B

secondary

#BFAB5C

accent

#C542E5

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #243C9B

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

Preview Lab → · Contrast checker → · Palette generator →