#243DA1#243DA1

#243DA1 is a dark, vivid blue. Relative luminance 0.063; OKLCH L 40.8% C 0.164 H 267.5°. Best body text is #FFFFFF at 9.30:1 contrast (WCAG AA passes).

Color values

HEX	#243DA1
RGB	rgb(36, 61, 161)
HSL	hsl(228, 63%, 39%)
HSV	hsv(228, 78%, 63%)
CMYK	cmyk(77.6%, 62.1%, 0%, 36.9%)
CIE-LAB	lab(30.12, 27.64, -56.78)
CIE-LCH	lch(30.12, 63.15, 295.95°)
OKLab	oklab(40.82% -0.0071 -0.1641)
OKLCH	oklch(40.82% 0.164 267.5)
XYZ	xyz(8.8271, 6.2848, 34.4592)
Luminance	0.0629 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243DA1 #A18824

analogous

#247BA1 #243DA1 #4924A1

triadic

#243DA1 #A1243D #3DA124

tetradic

#243DA1 #A1247B #A18824 #24A149

square

#243DA1 #A1247B #A18824 #24A149

split-complementary

#243DA1 #A14924 #7BA124

monochromatic

#0E173D #192A6F #243DA1 #3151D1 #637BDC

Accessibility & contrast

On white

9.30

#243DA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.26

#243DA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243DA1

9.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243DA1	#FFFFFF	#000000	##FFFFFF
##243DA1	1.00	9.30	2.26	9.30
#FFFFFF	9.30	1.00	21.00	1.00
#000000	2.26	21.00	1.00	21.00
##FFFFFF	9.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DA4

Deuteranopia (green-blind)

#00419F

Tritanopia (blue-blind)

#005769

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #243da1;
/* rgb */ color: rgb(36, 61, 161);
/* oklch */ color: oklch(40.8% 0.164 267.5);

Tailwind

colors: {
  custom: {
    50: '#7372be',
    500: '#243da1',
    950: '#000000',
  },
}

SCSS

$custom: #243da1;
$custom-light: #7372be;
$custom-dark: #000000;

JSON

{
  "hex": "#243da1",
  "rgb": {
    "r": 36,
    "g": 61,
    "b": 161
  },
  "hsl": {
    "h": 228,
    "s": 63.452,
    "l": 38.627
  },
  "oklch": {
    "l": 0.40819,
    "c": 0.16427,
    "h": 267.5
  },
  "luminance": 0.06286
}

Semantic roles & 50–950 ramp

primary

#243DA1

secondary

#C2AE5F

accent

#C541E6

background

#F7F6FB

surface

#EEECF7

border

#C9C7D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #243DA1

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

Preview Lab → · Contrast checker → · Palette generator →