#1B3284#1B3284

#1B3284 is a dark, vivid blue. Relative luminance 0.042; OKLCH L 35.6% C 0.140 H 266.8°. Best body text is #FFFFFF at 11.44:1 contrast (WCAG AA passes).

Color values

HEX	#1B3284
RGB	rgb(27, 50, 132)
HSL	hsl(227, 66%, 31%)
HSV	hsv(227, 80%, 52%)
CMYK	cmyk(79.5%, 62.1%, 0%, 48.2%)
CIE-LAB	lab(24.26, 22.83, -48.53)
CIE-LCH	lch(24.26, 53.64, 295.19°)
OKLab	oklab(35.57% -0.0078 -0.1403)
OKLCH	oklch(35.57% 0.14 266.8)
XYZ	xyz(5.7560, 4.1795, 22.3287)
Luminance	0.0418 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3284 #846D1B

analogous

#1B6684 #1B3284 #381B84

triadic

#1B3284 #841B32 #32841B

tetradic

#1B3284 #841B66 #846D1B #1B8438

square

#1B3284 #841B66 #846D1B #1B8438

split-complementary

#1B3284 #84381B #66841B

monochromatic

#060C1E #111F51 #1B3284 #2545B7 #4162D8

Accessibility & contrast

On white

11.44

#1B3284 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.84

#1B3284 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3284

11.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3284	#FFFFFF	#000000	##FFFFFF
##1B3284	1.00	11.44	1.84	11.44
#FFFFFF	11.44	1.00	21.00	1.00
#000000	1.84	21.00	1.00	21.00
##FFFFFF	11.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003F87

Deuteranopia (green-blind)

#003582

Tritanopia (blue-blind)

#004756

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #1b3284;
/* rgb */ color: rgb(27, 50, 132);
/* oklch */ color: oklch(35.6% 0.140 266.8);

Tailwind

colors: {
  custom: {
    50: '#6969a9',
    500: '#1b3284',
    950: '#000000',
  },
}

SCSS

$custom: #1b3284;
$custom-light: #6969a9;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3284",
  "rgb": {
    "r": 27,
    "g": 50,
    "b": 132
  },
  "hsl": {
    "h": 226.857,
    "s": 66.038,
    "l": 31.176
  },
  "oklch": {
    "l": 0.35569,
    "c": 0.14047,
    "h": 266.8
  },
  "luminance": 0.0418
}

Semantic roles & 50–950 ramp

primary

#1B3284

secondary

#B79E43

accent

#C43FE9

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070610

muted

#7A7A7F

Preview Lab

Preview with #1B3284

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

Preview Lab → · Contrast checker → · Palette generator →