#243CA7#243CA7

#243CA7 is a dark, vivid blue. Relative luminance 0.064; OKLCH L 41.2% C 0.174 H 267.8°. Best body text is #FFFFFF at 9.21:1 contrast (WCAG AA passes).

Color values

HEX	#243CA7
RGB	rgb(36, 60, 167)
HSL	hsl(229, 65%, 40%)
HSV	hsv(229, 78%, 65%)
CMYK	cmyk(78.4%, 64.1%, 0%, 34.5%)
CIE-LAB	lab(30.39, 30.58, -59.95)
CIE-LCH	lch(30.39, 67.30, 297.02°)
OKLab	oklab(41.18% -0.0066 -0.1734)
OKLCH	oklch(41.18% 0.174 267.8)
XYZ	xyz(9.3160, 6.3958, 37.2952)
Luminance	0.0640 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243CA7 #A78F24

analogous

#247DA7 #243CA7 #4E24A7

triadic

#243CA7 #A7243C #3CA724

tetradic

#243CA7 #A7247D #A78F24 #24A74E

square

#243CA7 #A7247D #A78F24 #24A74E

split-complementary

#243CA7 #A74E24 #7DA724

monochromatic

#0E1842 #192A75 #243CA7 #3552D3 #677DDE

Accessibility & contrast

On white

9.21

#243CA7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.28

#243CA7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243CA7

9.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243CA7	#FFFFFF	#000000	##FFFFFF
##243CA7	1.00	9.21	2.28	9.21
#FFFFFF	9.21	1.00	21.00	1.00
#000000	2.28	21.00	1.00	21.00
##FFFFFF	9.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EAA

Deuteranopia (green-blind)

#0041A5

Tritanopia (blue-blind)

#00586C

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #243ca7;
/* rgb */ color: rgb(36, 60, 167);
/* oklch */ color: oklch(41.2% 0.174 267.8);

Tailwind

colors: {
  custom: {
    50: '#7571c2',
    500: '#243ca7',
    950: '#000000',
  },
}

SCSS

$custom: #243ca7;
$custom-light: #7571c2;
$custom-dark: #000000;

JSON

{
  "hex": "#243ca7",
  "rgb": {
    "r": 36,
    "g": 60,
    "b": 167
  },
  "hsl": {
    "h": 229.008,
    "s": 64.532,
    "l": 39.804
  },
  "oklch": {
    "l": 0.41181,
    "c": 0.17356,
    "h": 267.8
  },
  "luminance": 0.06397
}

Semantic roles & 50–950 ramp

primary

#243CA7

secondary

#C4B263

accent

#C940E8

background

#F7F6FC

surface

#EEECF8

border

#C9C7D1

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #243CA7

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

Preview Lab → · Contrast checker → · Palette generator →