#1B41AD#1B41AD

#1B41AD is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.4% C 0.178 H 264.7°. Best body text is #FFFFFF at 8.73:1 contrast (WCAG AA passes).

Color values

HEX	#1B41AD
RGB	rgb(27, 65, 173)
HSL	hsl(224, 73%, 39%)
HSV	hsv(224, 84%, 68%)
CMYK	cmyk(84.4%, 62.4%, 0%, 32.2%)
CIE-LAB	lab(31.87, 28.76, -61.13)
CIE-LCH	lch(31.87, 67.56, 295.20°)
OKLab	oklab(42.35% -0.0163 -0.177)
OKLCH	oklch(42.35% 0.178 264.7)
XYZ	xyz(9.8824, 7.0295, 40.3630)
Luminance	0.0703 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B41AD #AD871B

analogous

#1B8AAD #1B41AD #3E1BAD

triadic

#1B41AD #AD1B41 #41AD1B

tetradic

#1B41AD #AD1B8A #AD871B #1BAD3E

square

#1B41AD #AD1B8A #AD871B #1BAD3E

split-complementary

#1B41AD #AD3E1B #8AAD1B

monochromatic

#0A1943 #132D78 #1B41AD #2857DD #5D80E6

Accessibility & contrast

On white

8.73

#1B41AD on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.41

#1B41AD on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B41AD

8.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B41AD	#FFFFFF	#000000	##FFFFFF
##1B41AD	1.00	8.73	2.41	8.73
#FFFFFF	8.73	1.00	21.00	1.00
#000000	2.41	21.00	1.00	21.00
##FFFFFF	8.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052B1

Deuteranopia (green-blind)

#0044AB

Tritanopia (blue-blind)

#005D71

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #1b41ad;
/* rgb */ color: rgb(27, 65, 173);
/* oklch */ color: oklch(42.4% 0.178 264.7);

Tailwind

colors: {
  custom: {
    50: '#7375c6',
    500: '#1b41ad',
    950: '#000000',
  },
}

SCSS

$custom: #1b41ad;
$custom-light: #7375c6;
$custom-dark: #000000;

JSON

{
  "hex": "#1b41ad",
  "rgb": {
    "r": 27,
    "g": 65,
    "b": 173
  },
  "hsl": {
    "h": 224.384,
    "s": 73,
    "l": 39.216
  },
  "oklch": {
    "l": 0.4235,
    "c": 0.17772,
    "h": 264.7
  },
  "luminance": 0.07031
}

Semantic roles & 50–950 ramp

primary

#1B41AD

secondary

#CAAD5A

accent

#C038F0

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #1B41AD

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

Preview Lab → · Contrast checker → · Palette generator →