#243EA8#243EA8

#243EA8 is a dark, vivid blue. Relative luminance 0.066; OKLCH L 41.6% C 0.172 H 267.4°. Best body text is #FFFFFF at 9.02:1 contrast (WCAG AA passes).

Color values

HEX	#243EA8
RGB	rgb(36, 62, 168)
HSL	hsl(228, 65%, 40%)
HSV	hsv(228, 79%, 66%)
CMYK	cmyk(78.6%, 63.1%, 0%, 34.1%)
CIE-LAB	lab(30.99, 29.63, -59.57)
CIE-LCH	lch(30.99, 66.54, 296.45°)
OKLab	oklab(41.65% -0.0078 -0.1723)
OKLCH	oklch(41.65% 0.172 267.4)
XYZ	xyz(9.5156, 6.6464, 37.8196)
Luminance	0.0665 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243EA8 #A88E24

analogous

#2480A8 #243EA8 #4C24A8

triadic

#243EA8 #A8243E #3EA824

tetradic

#243EA8 #A82480 #A88E24 #24A84C

square

#243EA8 #A82480 #A88E24 #24A84C

split-complementary

#243EA8 #A84C24 #80A824

monochromatic

#0E1943 #192B76 #243EA8 #3555D4 #687FDF

Accessibility & contrast

On white

9.02

#243EA8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.33

#243EA8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243EA8

9.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243EA8	#FFFFFF	#000000	##FFFFFF
##243EA8	1.00	9.02	2.33	9.02
#FFFFFF	9.02	1.00	21.00	1.00
#000000	2.33	21.00	1.00	21.00
##FFFFFF	9.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FAB

Deuteranopia (green-blind)

#0043A6

Tritanopia (blue-blind)

#005A6D

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #243ea8;
/* rgb */ color: rgb(36, 62, 168);
/* oklch */ color: oklch(41.6% 0.172 267.4);

Tailwind

colors: {
  custom: {
    50: '#7573c3',
    500: '#243ea8',
    950: '#000000',
  },
}

SCSS

$custom: #243ea8;
$custom-light: #7573c3;
$custom-dark: #000000;

JSON

{
  "hex": "#243ea8",
  "rgb": {
    "r": 36,
    "g": 62,
    "b": 168
  },
  "hsl": {
    "h": 228.182,
    "s": 64.706,
    "l": 40
  },
  "oklch": {
    "l": 0.4165,
    "c": 0.17249,
    "h": 267.4
  },
  "luminance": 0.06647
}

Semantic roles & 50–950 ramp

primary

#243EA8

secondary

#C4B163

accent

#C740E8

background

#F7F6FC

surface

#EEECF8

border

#C9C7D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #243EA8

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

Preview Lab → · Contrast checker → · Palette generator →