#243F66#243F66

#243F66 is a dark, moderate blue. Relative luminance 0.049; OKLCH L 36.6% C 0.075 H 257.6°. Best body text is #FFFFFF at 10.62:1 contrast (WCAG AA passes).

Color values

HEX	#243F66
RGB	rgb(36, 63, 102)
HSL	hsl(215, 48%, 27%)
HSV	hsv(215, 65%, 40%)
CMYK	cmyk(64.7%, 38.2%, 0%, 60%)
CIE-LAB	lab(26.42, 3.29, -25.99)
CIE-LCH	lch(26.42, 26.19, 277.23°)
OKLab	oklab(36.65% -0.0162 -0.0736)
OKLCH	oklch(36.65% 0.075 257.6)
XYZ	xyz(4.9025, 4.8889, 13.2531)
Luminance	0.0489 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243F66 #664B24

analogous

#246066 #243F66 #2A2466

triadic

#243F66 #66243F #3F6624

tetradic

#243F66 #662460 #664B24 #24662A

square

#243F66 #662460 #664B24 #24662A

split-complementary

#243F66 #662A24 #606624

monochromatic

#080E17 #142339 #243F66 #345B93 #4777BE

Accessibility & contrast

On white

10.62

#243F66 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.98

#243F66 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243F66

10.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243F66	#FFFFFF	#000000	##FFFFFF
##243F66	1.00	10.62	1.98	10.62
#FFFFFF	10.62	1.00	21.00	1.00
#000000	1.98	21.00	1.00	21.00
##FFFFFF	10.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E4268

Deuteranopia (green-blind)

#263C65

Tritanopia (blue-blind)

#00484D

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #243f66;
/* rgb */ color: rgb(36, 63, 102);
/* oklch */ color: oklch(36.6% 0.075 257.6);

Tailwind

colors: {
  custom: {
    50: '#657392',
    500: '#243f66',
    950: '#000000',
  },
}

SCSS

$custom: #243f66;
$custom-light: #657392;
$custom-dark: #000000;

JSON

{
  "hex": "#243f66",
  "rgb": {
    "r": 36,
    "g": 63,
    "b": 102
  },
  "hsl": {
    "h": 215.455,
    "s": 47.826,
    "l": 27.059
  },
  "oklch": {
    "l": 0.36647,
    "c": 0.07539,
    "h": 257.6
  },
  "luminance": 0.04889
}

Semantic roles & 50–950 ramp

primary

#243F66

secondary

#997A4C

accent

#A050D7

background

#F6F6F8

surface

#EBECF0

border

#C6C7CB

text

#06080D

muted

#7A7B7D

Preview Lab

Preview with #243F66

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

Preview Lab → · Contrast checker → · Palette generator →