#243FAE#243FAE

#243FAE is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.4% C 0.179 H 267.3°. Best body text is #FFFFFF at 8.76:1 contrast (WCAG AA passes).

Color values

HEX	#243FAE
RGB	rgb(36, 63, 174)
HSL	hsl(228, 66%, 41%)
HSV	hsv(228, 79%, 68%)
CMYK	cmyk(79.3%, 63.8%, 0%, 31.8%)
CIE-LAB	lab(31.77, 31.24, -61.88)
CIE-LCH	lch(31.77, 69.32, 296.79°)
OKLab	oklab(42.39% -0.0085 -0.179)
OKLCH	oklch(42.39% 0.179 267.3)
XYZ	xyz(10.1424, 6.9849, 40.8499)
Luminance	0.0699 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243FAE #AE9324

analogous

#2484AE #243FAE #4E24AE

triadic

#243FAE #AE243F #3FAE24

tetradic

#243FAE #AE2484 #AE9324 #24AE4E

square

#243FAE #AE2484 #AE9324 #24AE4E

split-complementary

#243FAE #AE4E24 #84AE24

monochromatic

#0F1A49 #1A2D7B #243FAE #3958D6 #6C83E1

Accessibility & contrast

On white

8.76

#243FAE on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.40

#243FAE on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243FAE

8.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243FAE	#FFFFFF	#000000	##FFFFFF
##243FAE	1.00	8.76	2.40	8.76
#FFFFFF	8.76	1.00	21.00	1.00
#000000	2.40	21.00	1.00	21.00
##FFFFFF	8.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051B2

Deuteranopia (green-blind)

#0044AC

Tritanopia (blue-blind)

#005C70

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #243fae;
/* rgb */ color: rgb(36, 63, 174);
/* oklch */ color: oklch(42.4% 0.179 267.3);

Tailwind

colors: {
  custom: {
    50: '#7673c7',
    500: '#243fae',
    950: '#000000',
  },
}

SCSS

$custom: #243fae;
$custom-light: #7673c7;
$custom-dark: #000000;

JSON

{
  "hex": "#243fae",
  "rgb": {
    "r": 36,
    "g": 63,
    "b": 174
  },
  "hsl": {
    "h": 228.261,
    "s": 65.714,
    "l": 41.176
  },
  "oklch": {
    "l": 0.42393,
    "c": 0.17925,
    "h": 267.3
  },
  "luminance": 0.06986
}

Semantic roles & 50–950 ramp

primary

#243FAE

secondary

#C7B467

accent

#C73FE9

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #243FAE

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

Preview Lab → · Contrast checker → · Palette generator →