#1B2171#1B2171

#1B2171 is a dark, vivid blue. Relative luminance 0.025; OKLCH L 30.4% C 0.135 H 271.9°. Best body text is #FFFFFF at 13.98:1 contrast (WCAG AA passes).

Color values

HEX	#1B2171
RGB	rgb(27, 33, 113)
HSL	hsl(236, 61%, 27%)
HSV	hsv(236, 76%, 44%)
CMYK	cmyk(76.1%, 70.8%, 0%, 55.7%)
CIE-LAB	lab(17.98, 27.12, -46.73)
CIE-LCH	lch(17.98, 54.03, 300.13°)
OKLab	oklab(30.4% 0.0046 -0.1351)
OKLCH	oklch(30.4% 0.135 271.9)
XYZ	xyz(3.9755, 2.5126, 15.8950)
Luminance	0.0251 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2171 #716B1B

analogous

#1B4C71 #1B2171 #401B71

triadic

#1B2171 #711B21 #21711B

tetradic

#1B2171 #711B4C #716B1B #1B7140

square

#1B2171 #711B4C #716B1B #1B7140

split-complementary

#1B2171 #71401B #4C711B

monochromatic

#060719 #0F1340 #1B2171 #272FA2 #3742CF

Accessibility & contrast

On white

13.98

#1B2171 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.50

#1B2171 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2171

13.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2171	#FFFFFF	#000000	##FFFFFF
##1B2171	1.00	13.98	1.50	13.98
#FFFFFF	13.98	1.00	21.00	1.00
#000000	1.50	21.00	1.00	21.00
##FFFFFF	13.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003073

Deuteranopia (green-blind)

#002870

Tritanopia (blue-blind)

#003746

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #1b2171;
/* rgb */ color: rgb(27, 33, 113);
/* oklch */ color: oklch(30.4% 0.135 271.9);

Tailwind

colors: {
  custom: {
    50: '#665c9b',
    500: '#1b2171',
    950: '#000000',
  },
}

SCSS

$custom: #1b2171;
$custom-light: #665c9b;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2171",
  "rgb": {
    "r": 27,
    "g": 33,
    "b": 113
  },
  "hsl": {
    "h": 235.814,
    "s": 61.429,
    "l": 27.451
  },
  "oklch": {
    "l": 0.30399,
    "c": 0.13521,
    "h": 271.9
  },
  "luminance": 0.02513
}

Semantic roles & 50–950 ramp

primary

#1B2171

secondary

#A69F42

accent

#D943E5

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07040E

muted

#7A797E

Preview Lab

Preview with #1B2171

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

Preview Lab → · Contrast checker → · Palette generator →