#1B2173#1B2173

#1B2173 is a dark, vivid blue. Relative luminance 0.026; OKLCH L 30.6% C 0.138 H 271.8°. Best body text is #FFFFFF at 13.89:1 contrast (WCAG AA passes).

Color values

HEX	#1B2173
RGB	rgb(27, 33, 115)
HSL	hsl(236, 62%, 28%)
HSV	hsv(236, 77%, 45%)
CMYK	cmyk(76.5%, 71.3%, 0%, 54.9%)
CIE-LAB	lab(18.18, 27.88, -47.69)
CIE-LCH	lch(18.18, 55.24, 300.31°)
OKLab	oklab(30.61% 0.0044 -0.1379)
OKLCH	oklch(30.61% 0.138 271.8)
XYZ	xyz(4.0893, 2.5581, 16.4946)
Luminance	0.0256 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2173 #736D1B

analogous

#1B4D73 #1B2173 #411B73

triadic

#1B2173 #731B21 #21731B

tetradic

#1B2173 #731B4D #736D1B #1B7341

square

#1B2173 #731B4D #736D1B #1B7341

split-complementary

#1B2173 #73411B #4D731B

monochromatic

#060719 #0F1341 #1B2173 #272FA5 #3842D0

Accessibility & contrast

On white

13.89

#1B2173 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.51

#1B2173 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2173

13.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2173	#FFFFFF	#000000	##FFFFFF
##1B2173	1.00	13.89	1.51	13.89
#FFFFFF	13.89	1.00	21.00	1.00
#000000	1.51	21.00	1.00	21.00
##FFFFFF	13.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003176

Deuteranopia (green-blind)

#002871

Tritanopia (blue-blind)

#003747

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #1b2173;
/* rgb */ color: rgb(27, 33, 115);
/* oklch */ color: oklch(30.6% 0.138 271.8);

Tailwind

colors: {
  custom: {
    50: '#675c9c',
    500: '#1b2173',
    950: '#000000',
  },
}

SCSS

$custom: #1b2173;
$custom-light: #675c9c;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2173",
  "rgb": {
    "r": 27,
    "g": 33,
    "b": 115
  },
  "hsl": {
    "h": 235.909,
    "s": 61.972,
    "l": 27.843
  },
  "oklch": {
    "l": 0.30608,
    "c": 0.138,
    "h": 271.8
  },
  "luminance": 0.02559
}

Semantic roles & 50–950 ramp

primary

#1B2173

secondary

#A8A142

accent

#DA43E5

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07040E

muted

#7A797E

Preview Lab

Preview with #1B2173

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

Preview Lab → · Contrast checker → · Palette generator →