#1B1D83#1B1D83

#1B1D83 is a dark, vivid blue. Relative luminance 0.028; OKLCH L 31.7% C 0.164 H 271.4°. Best body text is #FFFFFF at 13.55:1 contrast (WCAG AA passes).

Color values

HEX	#1B1D83
RGB	rgb(27, 29, 131)
HSL	hsl(239, 66%, 31%)
HSV	hsv(239, 79%, 51%)
CMYK	cmyk(79.4%, 77.9%, 0%, 48.6%)
CIE-LAB	lab(19.01, 36.26, -56.52)
CIE-LCH	lch(19.01, 67.15, 302.68°)
OKLab	oklab(31.73% 0.0039 -0.1636)
OKLCH	oklch(31.73% 0.164 271.4)
XYZ	xyz(4.9867, 2.7499, 21.7363)
Luminance	0.0275 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1D83 #83811B

analogous

#1B5183 #1B1D83 #4D1B83

triadic

#1B1D83 #831B1D #1D831B

tetradic

#1B1D83 #831B51 #83811B #1B834D

square

#1B1D83 #831B51 #83811B #1B834D

split-complementary

#1B1D83 #834D1B #51831B

monochromatic

#06071E #111250 #1B1D83 #2528B6 #4144D8

Accessibility & contrast

On white

13.55

#1B1D83 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.55

#1B1D83 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1D83

13.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1D83	#FFFFFF	#000000	##FFFFFF
##1B1D83	1.00	13.55	1.55	13.55
#FFFFFF	13.55	1.00	21.00	1.00
#000000	1.55	21.00	1.00	21.00
##FFFFFF	13.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003386

Deuteranopia (green-blind)

#002981

Tritanopia (blue-blind)

#003B4F

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #1b1d83;
/* rgb */ color: rgb(27, 29, 131);
/* oklch */ color: oklch(31.7% 0.164 271.4);

Tailwind

colors: {
  custom: {
    50: '#6b5aa8',
    500: '#1b1d83',
    950: '#000000',
  },
}

SCSS

$custom: #1b1d83;
$custom-light: #6b5aa8;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1d83",
  "rgb": {
    "r": 27,
    "g": 29,
    "b": 131
  },
  "hsl": {
    "h": 238.846,
    "s": 65.823,
    "l": 30.98
  },
  "oklch": {
    "l": 0.31726,
    "c": 0.1637,
    "h": 271.4
  },
  "luminance": 0.0275
}

Semantic roles & 50–950 ramp

primary

#1B1D83

secondary

#B6B443

accent

#E63FE9

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080410

muted

#7B797F

Preview Lab

Preview with #1B1D83

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

Preview Lab → · Contrast checker → · Palette generator →