#1B3AA1#1B3AA1

#1B3AA1 is a dark, vivid blue. Relative luminance 0.058; OKLCH L 39.9% C 0.170 H 265.7°. Best body text is #FFFFFF at 9.69:1 contrast (WCAG AA passes).

Color values

HEX	#1B3AA1
RGB	rgb(27, 58, 161)
HSL	hsl(226, 71%, 37%)
HSV	hsv(226, 83%, 63%)
CMYK	cmyk(83.2%, 64%, 0%, 36.9%)
CIE-LAB	lab(28.98, 28.79, -58.65)
CIE-LCH	lch(28.98, 65.34, 296.14°)
OKLab	oklab(39.88% -0.0126 -0.1698)
OKLCH	oklch(39.88% 0.17 265.7)
XYZ	xyz(8.3958, 5.8313, 34.3944)
Luminance	0.0583 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3AA1 #A1821B

analogous

#1B7DA1 #1B3AA1 #3F1BA1

triadic

#1B3AA1 #A11B3A #3AA11B

tetradic

#1B3AA1 #A11B7D #A1821B #1BA13F

square

#1B3AA1 #A11B7D #A1821B #1BA13F

split-complementary

#1B3AA1 #A13F1B #7DA11B

monochromatic

#091438 #12276D #1B3AA1 #244DD5 #5475E2

Accessibility & contrast

On white

9.69

#1B3AA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.17

#1B3AA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3AA1

9.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3AA1	#FFFFFF	#000000	##FFFFFF
##1B3AA1	1.00	9.69	2.17	9.69
#FFFFFF	9.69	1.00	21.00	1.00
#000000	2.17	21.00	1.00	21.00
##FFFFFF	9.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BA4

Deuteranopia (green-blind)

#003E9F

Tritanopia (blue-blind)

#005568

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #1b3aa1;
/* rgb */ color: rgb(27, 58, 161);
/* oklch */ color: oklch(39.9% 0.170 265.7);

Tailwind

colors: {
  custom: {
    50: '#716fbe',
    500: '#1b3aa1',
    950: '#000000',
  },
}

SCSS

$custom: #1b3aa1;
$custom-light: #716fbe;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3aa1",
  "rgb": {
    "r": 27,
    "g": 58,
    "b": 161
  },
  "hsl": {
    "h": 226.119,
    "s": 71.277,
    "l": 36.863
  },
  "oklch": {
    "l": 0.39877,
    "c": 0.17028,
    "h": 265.7
  },
  "luminance": 0.05832
}

Semantic roles & 50–950 ramp

primary

#1B3AA1

secondary

#C5AB52

accent

#C43AEE

background

#F7F6FB

surface

#EDECF7

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #1B3AA1

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

Preview Lab → · Contrast checker → · Palette generator →