#243B63#243B63

#243B63 is a dark, moderate blue. Relative luminance 0.044; OKLCH L 35.5% C 0.076 H 260.8°. Best body text is #FFFFFF at 11.17:1 contrast (WCAG AA passes).

Color values

HEX	#243B63
RGB	rgb(36, 59, 99)
HSL	hsl(218, 47%, 26%)
HSV	hsv(218, 64%, 39%)
CMYK	cmyk(63.6%, 40.4%, 0%, 61.2%)
CIE-LAB	lab(24.96, 4.89, -26.35)
CIE-LCH	lch(24.96, 26.80, 280.51°)
OKLab	oklab(35.46% -0.0121 -0.0747)
OKLCH	oklch(35.46% 0.076 260.8)
XYZ	xyz(4.5429, 4.4035, 12.4125)
Luminance	0.0440 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243B63 #634C24

analogous

#245B63 #243B63 #2D2463

triadic

#243B63 #63243B #3B6324

tetradic

#243B63 #63245B #634C24 #24632D

square

#243B63 #63245B #634C24 #24632D

split-complementary

#243B63 #632D24 #5B6324

monochromatic

#080D16 #142036 #243B63 #345690 #4671BC

Accessibility & contrast

On white

11.17

#243B63 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#243B63 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243B63

11.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243B63	#FFFFFF	#000000	##FFFFFF
##243B63	1.00	11.17	1.88	11.17
#FFFFFF	11.17	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A3E65

Deuteranopia (green-blind)

#223962

Tritanopia (blue-blind)

#00444A

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #243b63;
/* rgb */ color: rgb(36, 59, 99);
/* oklch */ color: oklch(35.5% 0.076 260.8);

Tailwind

colors: {
  custom: {
    50: '#65708f',
    500: '#243b63',
    950: '#000000',
  },
}

SCSS

$custom: #243b63;
$custom-light: #65708f;
$custom-dark: #000000;

JSON

{
  "hex": "#243b63",
  "rgb": {
    "r": 36,
    "g": 59,
    "b": 99
  },
  "hsl": {
    "h": 218.095,
    "s": 46.667,
    "l": 26.471
  },
  "oklch": {
    "l": 0.3546,
    "c": 0.07572,
    "h": 260.8
  },
  "luminance": 0.04404
}

Semantic roles & 50–950 ramp

primary

#243B63

secondary

#967B4C

accent

#A651D6

background

#F6F6F8

surface

#EBECF0

border

#C6C7CB

text

#06070C

muted

#7A7A7D

Preview Lab

Preview with #243B63

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

Preview Lab → · Contrast checker → · Palette generator →