#243F6B#243F6B

#243F6B is a dark, moderate blue. Relative luminance 0.050; OKLCH L 37.0% C 0.083 H 259.7°. Best body text is #FFFFFF at 10.51:1 contrast (WCAG AA passes).

Color values

HEX	#243F6B
RGB	rgb(36, 63, 107)
HSL	hsl(217, 50%, 28%)
HSV	hsv(217, 66%, 42%)
CMYK	cmyk(66.4%, 41.1%, 0%, 58%)
CIE-LAB	lab(26.71, 5.21, -28.73)
CIE-LCH	lch(26.71, 29.20, 280.28°)
OKLab	oklab(36.97% -0.0148 -0.0817)
OKLCH	oklch(36.97% 0.083 259.7)
XYZ	xyz(5.1580, 4.9911, 14.5986)
Luminance	0.0499 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243F6B #6B5024

analogous

#24626B #243F6B #2C246B

triadic

#243F6B #6B243F #3F6B24

tetradic

#243F6B #6B2462 #6B5024 #246B2C

square

#243F6B #6B2462 #6B5024 #246B2C

split-complementary

#243F6B #6B2C24 #626B24

monochromatic

#080D17 #15243D #243F6B #335A99 #4876C1

Accessibility & contrast

On white

10.51

#243F6B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.00

#243F6B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243F6B

10.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243F6B	#FFFFFF	#000000	##FFFFFF
##243F6B	1.00	10.51	2.00	10.51
#FFFFFF	10.51	1.00	21.00	1.00
#000000	2.00	21.00	1.00	21.00
##FFFFFF	10.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2C436D

Deuteranopia (green-blind)

#223C6A

Tritanopia (blue-blind)

#00494F

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #243f6b;
/* rgb */ color: rgb(36, 63, 107);
/* oklch */ color: oklch(37.0% 0.083 259.7);

Tailwind

colors: {
  custom: {
    50: '#667395',
    500: '#243f6b',
    950: '#000000',
  },
}

SCSS

$custom: #243f6b;
$custom-light: #667395;
$custom-dark: #000000;

JSON

{
  "hex": "#243f6b",
  "rgb": {
    "r": 36,
    "g": 63,
    "b": 107
  },
  "hsl": {
    "h": 217.183,
    "s": 49.65,
    "l": 28.039
  },
  "oklch": {
    "l": 0.36971,
    "c": 0.083,
    "h": 259.7
  },
  "luminance": 0.04992
}

Semantic roles & 50–950 ramp

primary

#243F6B

secondary

#9E7F4D

accent

#A44FD9

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06080D

muted

#7A7B7E

Preview Lab

Preview with #243F6B

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

Preview Lab → · Contrast checker → · Palette generator →