#1B3596#1B3596

#1B3596 is a dark, vivid blue. Relative luminance 0.050; OKLCH L 37.9% C 0.162 H 266.6°. Best body text is #FFFFFF at 10.52:1 contrast (WCAG AA passes).

Color values

HEX	#1B3596
RGB	rgb(27, 53, 150)
HSL	hsl(227, 69%, 35%)
HSV	hsv(227, 82%, 59%)
CMYK	cmyk(82%, 64.7%, 0%, 41.2%)
CIE-LAB	lab(26.68, 27.88, -55.73)
CIE-LCH	lch(26.68, 62.31, 296.58°)
OKLab	oklab(37.87% -0.0097 -0.1613)
OKLCH	oklch(37.87% 0.162 266.6)
XYZ	xyz(7.2282, 4.9804, 29.4286)
Luminance	0.0498 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3596 #967C1B

analogous

#1B7396 #1B3596 #3E1B96

triadic

#1B3596 #961B35 #35961B

tetradic

#1B3596 #961B73 #967C1B #1B963E

square

#1B3596 #961B73 #967C1B #1B963E

split-complementary

#1B3596 #963E1B #73961B

monochromatic

#08102E #122362 #1B3596 #2447CA #4D6BDF

Accessibility & contrast

On white

10.52

#1B3596 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.00

#1B3596 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3596

10.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3596	#FFFFFF	#000000	##FFFFFF
##1B3596	1.00	10.52	2.00	10.52
#FFFFFF	10.52	1.00	21.00	1.00
#000000	2.00	21.00	1.00	21.00
##FFFFFF	10.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004599

Deuteranopia (green-blind)

#003994

Tritanopia (blue-blind)

#004F60

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #1b3596;
/* rgb */ color: rgb(27, 53, 150);
/* oklch */ color: oklch(37.9% 0.162 266.6);

Tailwind

colors: {
  custom: {
    50: '#6e6cb6',
    500: '#1b3596',
    950: '#000000',
  },
}

SCSS

$custom: #1b3596;
$custom-light: #6e6cb6;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3596",
  "rgb": {
    "r": 27,
    "g": 53,
    "b": 150
  },
  "hsl": {
    "h": 227.317,
    "s": 69.492,
    "l": 34.706
  },
  "oklch": {
    "l": 0.37866,
    "c": 0.16159,
    "h": 266.6
  },
  "luminance": 0.04981
}

Semantic roles & 50–950 ramp

primary

#1B3596

secondary

#C1A84C

accent

#C73BEC

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#080611

muted

#7B7A80

Preview Lab

Preview with #1B3596

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

Preview Lab → · Contrast checker → · Palette generator →