#243B88#243B88

#243B88 is a dark, vivid blue. Relative luminance 0.053; OKLCH L 38.2% C 0.132 H 267.3°. Best body text is #FFFFFF at 10.21:1 contrast (WCAG AA passes).

Color values

HEX	#243B88
RGB	rgb(36, 59, 136)
HSL	hsl(226, 58%, 34%)
HSV	hsv(226, 74%, 53%)
CMYK	cmyk(73.5%, 56.6%, 0%, 46.7%)
CIE-LAB	lab(27.52, 19.32, -45.70)
CIE-LCH	lch(27.52, 49.62, 292.91°)
OKLab	oklab(38.23% -0.0063 -0.1316)
OKLCH	oklch(38.23% 0.132 267.3)
XYZ	xyz(6.7339, 5.2799, 23.9520)
Luminance	0.0528 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243B88 #887124

analogous

#246D88 #243B88 #3F2488

triadic

#243B88 #88243B #3B8824

tetradic

#243B88 #88246D #887124 #24883F

square

#243B88 #88246D #887124 #24883F

split-complementary

#243B88 #883F24 #6D8824

monochromatic

#0A1127 #172658 #243B88 #3150B8 #5571D2

Accessibility & contrast

On white

10.21

#243B88 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.06

#243B88 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243B88

10.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243B88	#FFFFFF	#000000	##FFFFFF
##243B88	1.00	10.21	2.06	10.21
#FFFFFF	10.21	1.00	21.00	1.00
#000000	2.06	21.00	1.00	21.00
##FFFFFF	10.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00468B

Deuteranopia (green-blind)

#003D86

Tritanopia (blue-blind)

#004E5B

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #243b88;
/* rgb */ color: rgb(36, 59, 136);
/* oklch */ color: oklch(38.2% 0.132 267.3);

Tailwind

colors: {
  custom: {
    50: '#6d70ab',
    500: '#243b88',
    950: '#000000',
  },
}

SCSS

$custom: #243b88;
$custom-light: #6d70ab;
$custom-dark: #000000;

JSON

{
  "hex": "#243b88",
  "rgb": {
    "r": 36,
    "g": 59,
    "b": 136
  },
  "hsl": {
    "h": 226.2,
    "s": 58.14,
    "l": 33.725
  },
  "oklch": {
    "l": 0.38231,
    "c": 0.13177,
    "h": 267.3
  },
  "luminance": 0.05281
}

Semantic roles & 50–950 ramp

primary

#243B88

secondary

#B69F52

accent

#BE46E1

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #243B88

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

Preview Lab → · Contrast checker → · Palette generator →