#1B3CA1#1B3CA1

#1B3CA1 is a dark, vivid blue. Relative luminance 0.060; OKLCH L 40.3% C 0.168 H 265.3°. Best body text is #FFFFFF at 9.51:1 contrast (WCAG AA passes).

Color values

HEX	#1B3CA1
RGB	rgb(27, 60, 161)
HSL	hsl(225, 71%, 37%)
HSV	hsv(225, 83%, 63%)
CMYK	cmyk(83.2%, 62.7%, 0%, 36.9%)
CIE-LAB	lab(29.51, 27.44, -57.80)
CIE-LCH	lch(29.51, 63.98, 295.40°)
OKLab	oklab(40.26% -0.0137 -0.1673)
OKLCH	oklch(40.26% 0.168 265.3)
XYZ	xyz(8.4986, 6.0369, 34.4286)
Luminance	0.0604 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3CA1 #A1801B

analogous

#1B7FA1 #1B3CA1 #3D1BA1

triadic

#1B3CA1 #A11B3C #3CA11B

tetradic

#1B3CA1 #A11B7F #A1801B #1BA13D

square

#1B3CA1 #A11B7F #A1801B #1BA13D

split-complementary

#1B3CA1 #A13D1B #7FA11B

monochromatic

#091538 #12286D #1B3CA1 #2450D5 #5477E2

Accessibility & contrast

On white

9.51

#1B3CA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.21

#1B3CA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3CA1

9.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3CA1	#FFFFFF	#000000	##FFFFFF
##1B3CA1	1.00	9.51	2.21	9.51
#FFFFFF	9.51	1.00	21.00	1.00
#000000	2.21	21.00	1.00	21.00
##FFFFFF	9.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CA4

Deuteranopia (green-blind)

#003F9F

Tritanopia (blue-blind)

#005668

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #1b3ca1;
/* rgb */ color: rgb(27, 60, 161);
/* oklch */ color: oklch(40.3% 0.168 265.3);

Tailwind

colors: {
  custom: {
    50: '#7071be',
    500: '#1b3ca1',
    950: '#000000',
  },
}

SCSS

$custom: #1b3ca1;
$custom-light: #7071be;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3ca1",
  "rgb": {
    "r": 27,
    "g": 60,
    "b": 161
  },
  "hsl": {
    "h": 225.224,
    "s": 71.277,
    "l": 36.863
  },
  "oklch": {
    "l": 0.40264,
    "c": 0.16784,
    "h": 265.3
  },
  "luminance": 0.06038
}

Semantic roles & 50–950 ramp

primary

#1B3CA1

secondary

#C5A952

accent

#C23AEE

background

#F7F6FB

surface

#EDECF7

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #1B3CA1

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

Preview Lab → · Contrast checker → · Palette generator →