#1B40AD#1B40AD

#1B40AD is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.2% C 0.179 H 264.9°. Best body text is #FFFFFF at 8.81:1 contrast (WCAG AA passes).

Color values

HEX	#1B40AD
RGB	rgb(27, 64, 173)
HSL	hsl(225, 73%, 39%)
HSV	hsv(225, 84%, 68%)
CMYK	cmyk(84.4%, 63%, 0%, 32.2%)
CIE-LAB	lab(31.61, 29.43, -61.56)
CIE-LCH	lch(31.61, 68.23, 295.55°)
OKLab	oklab(42.16% -0.0158 -0.1782)
OKLCH	oklch(42.16% 0.179 264.9)
XYZ	xyz(9.8255, 6.9157, 40.3441)
Luminance	0.0692 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B40AD #AD881B

analogous

#1B89AD #1B40AD #3F1BAD

triadic

#1B40AD #AD1B40 #40AD1B

tetradic

#1B40AD #AD1B89 #AD881B #1BAD3F

square

#1B40AD #AD1B89 #AD881B #1BAD3F

split-complementary

#1B40AD #AD3F1B #89AD1B

monochromatic

#0A1943 #132C78 #1B40AD #2856DD #5D7FE6

Accessibility & contrast

On white

8.81

#1B40AD on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.38

#1B40AD on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B40AD

8.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B40AD	#FFFFFF	#000000	##FFFFFF
##1B40AD	1.00	8.81	2.38	8.81
#FFFFFF	8.81	1.00	21.00	1.00
#000000	2.38	21.00	1.00	21.00
##FFFFFF	8.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051B1

Deuteranopia (green-blind)

#0044AB

Tritanopia (blue-blind)

#005D70

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #1b40ad;
/* rgb */ color: rgb(27, 64, 173);
/* oklch */ color: oklch(42.2% 0.179 264.9);

Tailwind

colors: {
  custom: {
    50: '#7374c6',
    500: '#1b40ad',
    950: '#000000',
  },
}

SCSS

$custom: #1b40ad;
$custom-light: #7374c6;
$custom-dark: #000000;

JSON

{
  "hex": "#1b40ad",
  "rgb": {
    "r": 27,
    "g": 64,
    "b": 173
  },
  "hsl": {
    "h": 224.795,
    "s": 73,
    "l": 39.216
  },
  "oklch": {
    "l": 0.42158,
    "c": 0.17893,
    "h": 264.9
  },
  "luminance": 0.06917
}

Semantic roles & 50–950 ramp

primary

#1B40AD

secondary

#CAAD5A

accent

#C138F0

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #1B40AD

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

Preview Lab → · Contrast checker → · Palette generator →