#1B2184#1B2184

#1B2184 is a dark, vivid blue. Relative luminance 0.030; OKLCH L 32.5% C 0.161 H 270.7°. Best body text is #FFFFFF at 13.15:1 contrast (WCAG AA passes).

Color values

HEX	#1B2184
RGB	rgb(27, 33, 132)
HSL	hsl(237, 66%, 31%)
HSV	hsv(237, 80%, 52%)
CMYK	cmyk(79.5%, 75%, 0%, 48.2%)
CIE-LAB	lab(19.99, 34.19, -55.54)
CIE-LCH	lch(19.99, 65.22, 301.62°)
OKLab	oklab(32.45% 0.002 -0.1608)
OKLCH	oklch(32.45% 0.161 270.7)
XYZ	xyz(5.1593, 2.9861, 22.1298)
Luminance	0.0299 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2184 #847E1B

analogous

#1B5584 #1B2184 #491B84

triadic

#1B2184 #841B21 #21841B

tetradic

#1B2184 #841B55 #847E1B #1B8449

square

#1B2184 #841B55 #847E1B #1B8449

split-complementary

#1B2184 #84491B #55841B

monochromatic

#06081E #111451 #1B2184 #252EB7 #414AD8

Accessibility & contrast

On white

13.15

#1B2184 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.60

#1B2184 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2184

13.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2184	#FFFFFF	#000000	##FFFFFF
##1B2184	1.00	13.15	1.60	13.15
#FFFFFF	13.15	1.00	21.00	1.00
#000000	1.60	21.00	1.00	21.00
##FFFFFF	13.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003587

Deuteranopia (green-blind)

#002B82

Tritanopia (blue-blind)

#003D50

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #1b2184;
/* rgb */ color: rgb(27, 33, 132);
/* oklch */ color: oklch(32.5% 0.161 270.7);

Tailwind

colors: {
  custom: {
    50: '#6b5da9',
    500: '#1b2184',
    950: '#000000',
  },
}

SCSS

$custom: #1b2184;
$custom-light: #6b5da9;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2184",
  "rgb": {
    "r": 27,
    "g": 33,
    "b": 132
  },
  "hsl": {
    "h": 236.571,
    "s": 66.038,
    "l": 31.176
  },
  "oklch": {
    "l": 0.32453,
    "c": 0.16084,
    "h": 270.7
  },
  "luminance": 0.02987
}

Semantic roles & 50–950 ramp

primary

#1B2184

secondary

#B7B143

accent

#DF3FE9

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080410

muted

#7B797F

Preview Lab

Preview with #1B2184

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

Preview Lab → · Contrast checker → · Palette generator →