#1B40AA#1B40AA

#1B40AA is a dark, vivid blue. Relative luminance 0.068; OKLCH L 41.9% C 0.175 H 264.8°. Best body text is #FFFFFF at 8.90:1 contrast (WCAG AA passes).

Color values

HEX	#1B40AA
RGB	rgb(27, 64, 170)
HSL	hsl(224, 73%, 39%)
HSV	hsv(224, 84%, 67%)
CMYK	cmyk(84.1%, 62.4%, 0%, 33.3%)
CIE-LAB	lab(31.35, 28.26, -60.20)
CIE-LCH	lch(31.35, 66.50, 295.15°)
OKLab	oklab(41.88% -0.0158 -0.1742)
OKLCH	oklch(41.88% 0.175 264.8)
XYZ	xyz(9.5385, 6.8009, 38.8324)
Luminance	0.0680 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B40AA #AA851B

analogous

#1B87AA #1B40AA #3E1BAA

triadic

#1B40AA #AA1B40 #40AA1B

tetradic

#1B40AA #AA1B87 #AA851B #1BAA3E

square

#1B40AA #AA1B87 #AA851B #1BAA3E

split-complementary

#1B40AA #AA3E1B #87AA1B

monochromatic

#0A1840 #132C75 #1B40AA #2655DC #5B7EE5

Accessibility & contrast

On white

8.90

#1B40AA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.36

#1B40AA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B40AA

8.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B40AA	#FFFFFF	#000000	##FFFFFF
##1B40AA	1.00	8.90	2.36	8.90
#FFFFFF	8.90	1.00	21.00	1.00
#000000	2.36	21.00	1.00	21.00
##FFFFFF	8.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051AD

Deuteranopia (green-blind)

#0043A8

Tritanopia (blue-blind)

#005C6F

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #1b40aa;
/* rgb */ color: rgb(27, 64, 170);
/* oklch */ color: oklch(41.9% 0.175 264.8);

Tailwind

colors: {
  custom: {
    50: '#7374c4',
    500: '#1b40aa',
    950: '#000000',
  },
}

SCSS

$custom: #1b40aa;
$custom-light: #7374c4;
$custom-dark: #000000;

JSON

{
  "hex": "#1b40aa",
  "rgb": {
    "r": 27,
    "g": 64,
    "b": 170
  },
  "hsl": {
    "h": 224.476,
    "s": 72.589,
    "l": 38.627
  },
  "oklch": {
    "l": 0.41879,
    "c": 0.17497,
    "h": 264.8
  },
  "luminance": 0.06802
}

Semantic roles & 50–950 ramp

primary

#1B40AA

secondary

#C9AC58

accent

#C039EF

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #1B40AA

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

Preview Lab → · Contrast checker → · Palette generator →