#243CA4#243CA4

#243CA4 is a dark, vivid blue. Relative luminance 0.063; OKLCH L 40.9% C 0.170 H 267.8°. Best body text is #FFFFFF at 9.30:1 contrast (WCAG AA passes).

Color values

HEX	#243CA4
RGB	rgb(36, 60, 164)
HSL	hsl(229, 64%, 39%)
HSV	hsv(229, 78%, 64%)
CMYK	cmyk(78%, 63.4%, 0%, 35.7%)
CIE-LAB	lab(30.12, 29.44, -58.58)
CIE-LCH	lch(30.12, 65.57, 296.68°)
OKLab	oklab(40.9% -0.0065 -0.1694)
OKLCH	oklch(40.9% 0.17 267.8)
XYZ	xyz(9.0419, 6.2861, 35.8516)
Luminance	0.0629 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243CA4 #A48C24

analogous

#247CA4 #243CA4 #4C24A4

triadic

#243CA4 #A4243C #3CA424

tetradic

#243CA4 #A4247C #A48C24 #24A44C

square

#243CA4 #A4247C #A48C24 #24A44C

split-complementary

#243CA4 #A44C24 #7CA424

monochromatic

#0E1740 #192A72 #243CA4 #3351D2 #657CDD

Accessibility & contrast

On white

9.30

#243CA4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.26

#243CA4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243CA4

9.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243CA4	#FFFFFF	#000000	##FFFFFF
##243CA4	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)

#004DA7

Deuteranopia (green-blind)

#0041A2

Tritanopia (blue-blind)

#00576A

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #243ca4;
/* rgb */ color: rgb(36, 60, 164);
/* oklch */ color: oklch(40.9% 0.170 267.8);

Tailwind

colors: {
  custom: {
    50: '#7471c0',
    500: '#243ca4',
    950: '#000000',
  },
}

SCSS

$custom: #243ca4;
$custom-light: #7471c0;
$custom-dark: #000000;

JSON

{
  "hex": "#243ca4",
  "rgb": {
    "r": 36,
    "g": 60,
    "b": 164
  },
  "hsl": {
    "h": 228.75,
    "s": 64,
    "l": 39.216
  },
  "oklch": {
    "l": 0.40902,
    "c": 0.16954,
    "h": 267.8
  },
  "luminance": 0.06287
}

Semantic roles & 50–950 ramp

primary

#243CA4

secondary

#C3B061

accent

#C841E7

background

#F7F6FB

surface

#EEECF7

border

#C9C7D0

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #243CA4

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

Preview Lab → · Contrast checker → · Palette generator →