#1B41A1#1B41A1

#1B41A1 is a dark, vivid blue. Relative luminance 0.066; OKLCH L 41.3% C 0.162 H 264.1°. Best body text is #FFFFFF at 9.06:1 contrast (WCAG AA passes).

Color values

HEX	#1B41A1
RGB	rgb(27, 65, 161)
HSL	hsl(223, 71%, 37%)
HSV	hsv(223, 83%, 63%)
CMYK	cmyk(83.2%, 59.6%, 0%, 36.9%)
CIE-LAB	lab(30.84, 24.05, -55.61)
CIE-LCH	lch(30.84, 60.58, 293.39°)
OKLab	oklab(41.26% -0.0167 -0.1608)
OKLCH	oklch(41.26% 0.162 264.1)
XYZ	xyz(8.7730, 6.5858, 34.5201)
Luminance	0.0659 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B41A1 #A17B1B

analogous

#1B84A1 #1B41A1 #381BA1

triadic

#1B41A1 #A11B41 #41A11B

tetradic

#1B41A1 #A11B84 #A17B1B #1BA138

square

#1B41A1 #A11B84 #A17B1B #1BA138

split-complementary

#1B41A1 #A1381B #84A11B

monochromatic

#091738 #122C6D #1B41A1 #2456D5 #547CE2

Accessibility & contrast

On white

9.06

#1B41A1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.32

#1B41A1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B41A1

9.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B41A1	#FFFFFF	#000000	##FFFFFF
##1B41A1	1.00	9.06	2.32	9.06
#FFFFFF	9.06	1.00	21.00	1.00
#000000	2.32	21.00	1.00	21.00
##FFFFFF	9.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FA4

Deuteranopia (green-blind)

#00439F

Tritanopia (blue-blind)

#00596A

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #1b41a1;
/* rgb */ color: rgb(27, 65, 161);
/* oklch */ color: oklch(41.3% 0.162 264.1);

Tailwind

colors: {
  custom: {
    50: '#7075be',
    500: '#1b41a1',
    950: '#000000',
  },
}

SCSS

$custom: #1b41a1;
$custom-light: #7075be;
$custom-dark: #000000;

JSON

{
  "hex": "#1b41a1",
  "rgb": {
    "r": 27,
    "g": 65,
    "b": 161
  },
  "hsl": {
    "h": 222.985,
    "s": 71.277,
    "l": 36.863
  },
  "oklch": {
    "l": 0.41263,
    "c": 0.16165,
    "h": 264.1
  },
  "luminance": 0.06587
}

Semantic roles & 50–950 ramp

primary

#1B41A1

secondary

#C5A552

accent

#BB3AEE

background

#F7F7FB

surface

#EDEDF7

border

#C8C8D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #1B41A1

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

Preview Lab → · Contrast checker → · Palette generator →