#243B66#243B66

#243B66 is a dark, moderate blue. Relative luminance 0.045; OKLCH L 35.7% C 0.080 H 261.9°. Best body text is #FFFFFF at 11.10:1 contrast (WCAG AA passes).

Color values

HEX	#243B66
RGB	rgb(36, 59, 102)
HSL	hsl(219, 48%, 27%)
HSV	hsv(219, 65%, 40%)
CMYK	cmyk(64.7%, 42.2%, 0%, 60%)
CIE-LAB	lab(25.14, 6.04, -28.00)
CIE-LCH	lch(25.14, 28.65, 282.17°)
OKLab	oklab(35.66% -0.0114 -0.0796)
OKLCH	oklch(35.66% 0.08 261.9)
XYZ	xyz(4.6890, 4.4619, 13.1819)
Luminance	0.0446 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243B66 #664F24

analogous

#245C66 #243B66 #2E2466

triadic

#243B66 #66243B #3B6624

tetradic

#243B66 #66245C #664F24 #24662E

square

#243B66 #66245C #664F24 #24662E

split-complementary

#243B66 #662E24 #5C6624

monochromatic

#080D17 #142139 #243B66 #345593 #4770BE

Accessibility & contrast

On white

11.10

#243B66 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.89

#243B66 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243B66

11.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243B66	#FFFFFF	#000000	##FFFFFF
##243B66	1.00	11.10	1.89	11.10
#FFFFFF	11.10	1.00	21.00	1.00
#000000	1.89	21.00	1.00	21.00
##FFFFFF	11.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#283F68

Deuteranopia (green-blind)

#1F3965

Tritanopia (blue-blind)

#00454B

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #243b66;
/* rgb */ color: rgb(36, 59, 102);
/* oklch */ color: oklch(35.7% 0.080 261.9);

Tailwind

colors: {
  custom: {
    50: '#667092',
    500: '#243b66',
    950: '#000000',
  },
}

SCSS

$custom: #243b66;
$custom-light: #667092;
$custom-dark: #000000;

JSON

{
  "hex": "#243b66",
  "rgb": {
    "r": 36,
    "g": 59,
    "b": 102
  },
  "hsl": {
    "h": 219.091,
    "s": 47.826,
    "l": 27.059
  },
  "oklch": {
    "l": 0.35658,
    "c": 0.0804,
    "h": 261.9
  },
  "luminance": 0.04462
}

Semantic roles & 50–950 ramp

primary

#243B66

secondary

#997F4C

accent

#A850D7

background

#F6F6F9

surface

#EBECF1

border

#C6C7CB

text

#06070D

muted

#7A7A7E

Preview Lab

Preview with #243B66

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

Preview Lab → · Contrast checker → · Palette generator →