#243B9B#243B9B

#243B9B is a dark, vivid blue. Relative luminance 0.059; OKLCH L 39.9% C 0.159 H 267.9°. Best body text is #FFFFFF at 9.66:1 contrast (WCAG AA passes).

Color values

HEX	#243B9B
RGB	rgb(36, 59, 155)
HSL	hsl(228, 62%, 37%)
HSV	hsv(228, 77%, 61%)
CMYK	cmyk(76.8%, 61.9%, 0%, 39.2%)
CIE-LAB	lab(29.08, 26.68, -54.84)
CIE-LCH	lch(29.08, 60.99, 295.94°)
OKLab	oklab(39.89% -0.0057 -0.1585)
OKLCH	oklch(39.89% 0.159 267.9)
XYZ	xyz(8.2059, 5.8687, 31.7043)
Luminance	0.0587 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243B9B #9B8424

analogous

#24779B #243B9B #48249B

triadic

#243B9B #9B243B #3B9B24

tetradic

#243B9B #9B2477 #9B8424 #249B48

square

#243B9B #9B2477 #9B8424 #249B48

split-complementary

#243B9B #9B4824 #779B24

monochromatic

#0D1538 #182869 #243B9B #304ECD #5F77DA

Accessibility & contrast

On white

9.66

#243B9B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.17

#243B9B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243B9B

9.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243B9B	#FFFFFF	#000000	##FFFFFF
##243B9B	1.00	9.66	2.17	9.66
#FFFFFF	9.66	1.00	21.00	1.00
#000000	2.17	21.00	1.00	21.00
##FFFFFF	9.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004A9E

Deuteranopia (green-blind)

#003F99

Tritanopia (blue-blind)

#005465

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #243b9b;
/* rgb */ color: rgb(36, 59, 155);
/* oklch */ color: oklch(39.9% 0.159 267.9);

Tailwind

colors: {
  custom: {
    50: '#7270b9',
    500: '#243b9b',
    950: '#000000',
  },
}

SCSS

$custom: #243b9b;
$custom-light: #7270b9;
$custom-dark: #000000;

JSON

{
  "hex": "#243b9b",
  "rgb": {
    "r": 36,
    "g": 59,
    "b": 155
  },
  "hsl": {
    "h": 228.403,
    "s": 62.304,
    "l": 37.451
  },
  "oklch": {
    "l": 0.39886,
    "c": 0.15856,
    "h": 267.9
  },
  "luminance": 0.0587
}

Semantic roles & 50–950 ramp

primary

#243B9B

secondary

#BFAC5C

accent

#C642E5

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #243B9B

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

Preview Lab → · Contrast checker → · Palette generator →