#243EB1#243EB1

#243EB1 is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.5% C 0.184 H 267.5°. Best body text is #FFFFFF at 8.75:1 contrast (WCAG AA passes).

Color values

HEX	#243EB1
RGB	rgb(36, 62, 177)
HSL	hsl(229, 66%, 42%)
HSV	hsv(229, 80%, 69%)
CMYK	cmyk(79.7%, 65%, 0%, 30.6%)
CIE-LAB	lab(31.79, 33.02, -63.64)
CIE-LCH	lch(31.79, 71.69, 297.42°)
OKLab	oklab(42.49% -0.008 -0.1842)
OKLCH	oklch(42.49% 0.184 267.5)
XYZ	xyz(10.3832, 6.9934, 42.3891)
Luminance	0.0699 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243EB1 #B19724

analogous

#2485B1 #243EB1 #5124B1

triadic

#243EB1 #B1243E #3EB124

tetradic

#243EB1 #B12485 #B19724 #24B151

square

#243EB1 #B12485 #B19724 #24B151

split-complementary

#243EB1 #B15124 #85B124

monochromatic

#0F1A4B #1A2C7E #243EB1 #3B58D7 #6E83E1

Accessibility & contrast

On white

8.75

#243EB1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.40

#243EB1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243EB1

8.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243EB1	#FFFFFF	#000000	##FFFFFF
##243EB1	1.00	8.75	2.40	8.75
#FFFFFF	8.75	1.00	21.00	1.00
#000000	2.40	21.00	1.00	21.00
##FFFFFF	8.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052B5

Deuteranopia (green-blind)

#0044AF

Tritanopia (blue-blind)

#005D72

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #243eb1;
/* rgb */ color: rgb(36, 62, 177);
/* oklch */ color: oklch(42.5% 0.184 267.5);

Tailwind

colors: {
  custom: {
    50: '#7773c9',
    500: '#243eb1',
    950: '#000000',
  },
}

SCSS

$custom: #243eb1;
$custom-light: #7773c9;
$custom-dark: #000000;

JSON

{
  "hex": "#243eb1",
  "rgb": {
    "r": 36,
    "g": 62,
    "b": 177
  },
  "hsl": {
    "h": 228.936,
    "s": 66.197,
    "l": 41.765
  },
  "oklch": {
    "l": 0.4249,
    "c": 0.18438,
    "h": 267.5
  },
  "luminance": 0.06995
}

Semantic roles & 50–950 ramp

primary

#243EB1

secondary

#C8B669

accent

#CA3FE9

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #243EB1

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

Preview Lab → · Contrast checker → · Palette generator →