#243B8A#243B8A

#243B8A is a dark, vivid blue. Relative luminance 0.053; OKLCH L 38.4% C 0.135 H 267.4°. Best body text is #FFFFFF at 10.16:1 contrast (WCAG AA passes).

Color values

HEX	#243B8A
RGB	rgb(36, 59, 138)
HSL	hsl(226, 59%, 34%)
HSV	hsv(226, 74%, 54%)
CMYK	cmyk(73.9%, 57.2%, 0%, 45.9%)
CIE-LAB	lab(27.67, 20.10, -46.69)
CIE-LCH	lch(27.67, 50.83, 293.29°)
OKLab	oklab(38.4% -0.0062 -0.1345)
OKLCH	oklch(38.4% 0.135 267.4)
XYZ	xyz(6.8774, 5.3373, 24.7076)
Luminance	0.0534 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243B8A #8A7324

analogous

#246E8A #243B8A #40248A

triadic

#243B8A #8A243B #3B8A24

tetradic

#243B8A #8A246E #8A7324 #248A40

square

#243B8A #8A246E #8A7324 #248A40

split-complementary

#243B8A #8A4024 #6E8A24

monochromatic

#0B1129 #172659 #243B8A #3150BB #5672D3

Accessibility & contrast

On white

10.16

#243B8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.07

#243B8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243B8A

10.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243B8A	#FFFFFF	#000000	##FFFFFF
##243B8A	1.00	10.16	2.07	10.16
#FFFFFF	10.16	1.00	21.00	1.00
#000000	2.07	21.00	1.00	21.00
##FFFFFF	10.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00468D

Deuteranopia (green-blind)

#003D88

Tritanopia (blue-blind)

#004E5C

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #243b8a;
/* rgb */ color: rgb(36, 59, 138);
/* oklch */ color: oklch(38.4% 0.135 267.4);

Tailwind

colors: {
  custom: {
    50: '#6d70ad',
    500: '#243b8a',
    950: '#000000',
  },
}

SCSS

$custom: #243b8a;
$custom-light: #6d70ad;
$custom-dark: #000000;

JSON

{
  "hex": "#243b8a",
  "rgb": {
    "r": 36,
    "g": 59,
    "b": 138
  },
  "hsl": {
    "h": 226.471,
    "s": 58.621,
    "l": 34.118
  },
  "oklch": {
    "l": 0.38399,
    "c": 0.13466,
    "h": 267.4
  },
  "luminance": 0.05338
}

Semantic roles & 50–950 ramp

primary

#243B8A

secondary

#B7A053

accent

#BF46E2

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #243B8A

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

Preview Lab → · Contrast checker → · Palette generator →