#1B1671#1B1671

#1B1671 is a dark, vivid blue. Relative luminance 0.020; OKLCH L 28.6% C 0.147 H 274.2°. Best body text is #FFFFFF at 15.00:1 contrast (WCAG AA passes).

Color values

HEX	#1B1671
RGB	rgb(27, 22, 113)
HSL	hsl(243, 67%, 26%)
HSV	hsv(243, 81%, 44%)
CMYK	cmyk(76.1%, 80.5%, 0%, 55.7%)
CIE-LAB	lab(15.48, 34.05, -50.84)
CIE-LCH	lch(15.48, 61.19, 303.81°)
OKLab	oklab(28.62% 0.0108 -0.1471)
OKLCH	oklch(28.62% 0.147 274.2)
XYZ	xyz(3.7186, 1.9987, 15.8094)
Luminance	0.0200 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1671 #6C7116

analogous

#163F71 #1B1671 #491671

triadic

#1B1671 #711B16 #16711B

tetradic

#1B1671 #71163F #6C7116 #167149

square

#1B1671 #71163F #6C7116 #167149

split-complementary

#1B1671 #714916 #3F7116

monochromatic

#06051A #0F0C3E #1B1671 #2720A4 #352CD6

Accessibility & contrast

On white

15.00

#1B1671 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.40

#1B1671 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1671

15.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1671	#FFFFFF	#000000	##FFFFFF
##1B1671	1.00	15.00	1.40	15.00
#FFFFFF	15.00	1.00	21.00	1.00
#000000	1.40	21.00	1.00	21.00
##FFFFFF	15.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002B74

Deuteranopia (green-blind)

#00226F

Tritanopia (blue-blind)

#003143

Achromatopsia (no color)

#272727

Design tokens & code

CSS

--color: #1b1671;
/* rgb */ color: rgb(27, 22, 113);
/* oklch */ color: oklch(28.6% 0.147 274.2);

Tailwind

colors: {
  custom: {
    50: '#67559b',
    500: '#1b1671',
    950: '#000000',
  },
}

SCSS

$custom: #1b1671;
$custom-light: #67559b;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1671",
  "rgb": {
    "r": 27,
    "g": 22,
    "b": 113
  },
  "hsl": {
    "h": 243.297,
    "s": 67.407,
    "l": 26.471
  },
  "oklch": {
    "l": 0.28616,
    "c": 0.14747,
    "h": 274.2
  },
  "luminance": 0.01999
}

Semantic roles & 50–950 ramp

primary

#1B1671

secondary

#A1A73C

accent

#EA3EE1

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07030E

muted

#7A787E

Preview Lab

Preview with #1B1671

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

Preview Lab → · Contrast checker → · Palette generator →