#243A8E#243A8E

#243A8E is a dark, vivid blue. Relative luminance 0.054; OKLCH L 38.5% C 0.142 H 267.9°. Best body text is #FFFFFF at 10.14:1 contrast (WCAG AA passes).

Color values

HEX	#243A8E
RGB	rgb(36, 58, 142)
HSL	hsl(228, 60%, 35%)
HSV	hsv(228, 75%, 56%)
CMYK	cmyk(74.6%, 59.2%, 0%, 44.3%)
CIE-LAB	lab(27.72, 22.34, -49.09)
CIE-LCH	lch(27.72, 53.94, 294.47°)
OKLab	oklab(38.53% -0.0052 -0.1416)
OKLCH	oklch(38.53% 0.142 267.9)
XYZ	xyz(7.1214, 5.3534, 26.2439)
Luminance	0.0535 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243A8E #8E7824

analogous

#246F8E #243A8E #43248E

triadic

#243A8E #8E243A #3A8E24

tetradic

#243A8E #8E246F #8E7824 #248E43

square

#243A8E #8E246F #8E7824 #248E43

split-complementary

#243A8E #8E4324 #6F8E24

monochromatic

#0B122C #18265D #243A8E #304EBF #5872D5

Accessibility & contrast

On white

10.14

#243A8E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.07

#243A8E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243A8E

10.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243A8E	#FFFFFF	#000000	##FFFFFF
##243A8E	1.00	10.14	2.07	10.14
#FFFFFF	10.14	1.00	21.00	1.00
#000000	2.07	21.00	1.00	21.00
##FFFFFF	10.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004791

Deuteranopia (green-blind)

#003D8C

Tritanopia (blue-blind)

#004F5E

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #243a8e;
/* rgb */ color: rgb(36, 58, 142);
/* oklch */ color: oklch(38.5% 0.142 267.9);

Tailwind

colors: {
  custom: {
    50: '#6f6fb0',
    500: '#243a8e',
    950: '#000000',
  },
}

SCSS

$custom: #243a8e;
$custom-light: #6f6fb0;
$custom-dark: #000000;

JSON

{
  "hex": "#243a8e",
  "rgb": {
    "r": 36,
    "g": 58,
    "b": 142
  },
  "hsl": {
    "h": 227.547,
    "s": 59.551,
    "l": 34.902
  },
  "oklch": {
    "l": 0.38533,
    "c": 0.14168,
    "h": 267.9
  },
  "luminance": 0.05354
}

Semantic roles & 50–950 ramp

primary

#243A8E

secondary

#B9A455

accent

#C245E3

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #243A8E

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

Preview Lab → · Contrast checker → · Palette generator →