#1B40A0#1B40A0

#1B40A0 is a dark, vivid blue. Relative luminance 0.064; OKLCH L 41.0% C 0.162 H 264.3°. Best body text is #FFFFFF at 9.18:1 contrast (WCAG AA passes).

Color values

HEX	#1B40A0
RGB	rgb(27, 64, 160)
HSL	hsl(223, 71%, 37%)
HSV	hsv(223, 83%, 63%)
CMYK	cmyk(83.1%, 60%, 0%, 37.3%)
CIE-LAB	lab(30.49, 24.33, -55.58)
CIE-LCH	lch(30.49, 60.68, 293.64°)
OKLab	oklab(40.97% -0.0161 -0.1607)
OKLCH	oklch(40.97% 0.162 264.3)
XYZ	xyz(8.6283, 6.4368, 34.0386)
Luminance	0.0644 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B40A0 #A07B1B

analogous

#1B83A0 #1B40A0 #381BA0

triadic

#1B40A0 #A01B40 #40A01B

tetradic

#1B40A0 #A01B83 #A07B1B #1BA038

square

#1B40A0 #A01B83 #A07B1B #1BA038

split-complementary

#1B40A0 #A0381B #83A01B

monochromatic

#091637 #122B6C #1B40A0 #2455D4 #537BE2

Accessibility & contrast

On white

9.18

#1B40A0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.29

#1B40A0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B40A0

9.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B40A0	#FFFFFF	#000000	##FFFFFF
##1B40A0	1.00	9.18	2.29	9.18
#FFFFFF	9.18	1.00	21.00	1.00
#000000	2.29	21.00	1.00	21.00
##FFFFFF	9.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EA3

Deuteranopia (green-blind)

#00429E

Tritanopia (blue-blind)

#005969

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #1b40a0;
/* rgb */ color: rgb(27, 64, 160);
/* oklch */ color: oklch(41.0% 0.162 264.3);

Tailwind

colors: {
  custom: {
    50: '#7074bd',
    500: '#1b40a0',
    950: '#000000',
  },
}

SCSS

$custom: #1b40a0;
$custom-light: #7074bd;
$custom-dark: #000000;

JSON

{
  "hex": "#1b40a0",
  "rgb": {
    "r": 27,
    "g": 64,
    "b": 160
  },
  "hsl": {
    "h": 223.308,
    "s": 71.123,
    "l": 36.667
  },
  "oklch": {
    "l": 0.40971,
    "c": 0.16153,
    "h": 264.3
  },
  "luminance": 0.06438
}

Semantic roles & 50–950 ramp

primary

#1B40A0

secondary

#C5A552

accent

#BC3AEE

background

#F7F7FB

surface

#EDEDF7

border

#C8C8D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #1B40A0

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

Preview Lab → · Contrast checker → · Palette generator →