#1B176A#1B176A

#1B176A is a dark, vivid blue. Relative luminance 0.019; OKLCH L 28.0% C 0.137 H 275.0°. Best body text is #FFFFFF at 15.25:1 contrast (WCAG AA passes).

Color values

HEX	#1B176A
RGB	rgb(27, 23, 106)
HSL	hsl(243, 64%, 25%)
HSV	hsv(243, 78%, 42%)
CMYK	cmyk(74.5%, 78.3%, 0%, 58.4%)
CIE-LAB	lab(14.88, 30.99, -47.27)
CIE-LCH	lch(14.88, 56.52, 303.25°)
OKLab	oklab(27.95% 0.0119 -0.1367)
OKLCH	oklch(27.95% 0.137 275)
XYZ	xyz(3.3590, 1.8861, 13.8199)
Luminance	0.0189 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B176A #666A17

analogous

#173C6A #1B176A #45176A

triadic

#1B176A #6A1B17 #176A1B

tetradic

#1B176A #6A173C #666A17 #176A45

square

#1B176A #6A173C #666A17 #176A45

split-complementary

#1B176A #6A4517 #3C6A17

monochromatic

#060519 #0E0C38 #1B176A #28229C #352DCF

Accessibility & contrast

On white

15.25

#1B176A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.38

#1B176A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B176A

15.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B176A	#FFFFFF	#000000	##FFFFFF
##1B176A	1.00	15.25	1.38	15.25
#FFFFFF	15.25	1.00	21.00	1.00
#000000	1.38	21.00	1.00	21.00
##FFFFFF	15.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00296C

Deuteranopia (green-blind)

#002269

Tritanopia (blue-blind)

#002F3F

Achromatopsia (no color)

#252525

Design tokens & code

CSS

--color: #1b176a;
/* rgb */ color: rgb(27, 23, 106);
/* oklch */ color: oklch(28.0% 0.137 275.0);

Tailwind

colors: {
  custom: {
    50: '#655596',
    500: '#1b176a',
    950: '#000000',
  },
}

SCSS

$custom: #1b176a;
$custom-light: #655596;
$custom-dark: #000000;

JSON

{
  "hex": "#1b176a",
  "rgb": {
    "r": 27,
    "g": 23,
    "b": 106
  },
  "hsl": {
    "h": 242.892,
    "s": 64.341,
    "l": 25.294
  },
  "oklch": {
    "l": 0.2795,
    "c": 0.13721,
    "h": 275
  },
  "luminance": 0.01886
}

Semantic roles & 50–950 ramp

primary

#1B176A

secondary

#9BA03D

accent

#E740DF

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#06030D

muted

#7A787E

Preview Lab

Preview with #1B176A

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

Preview Lab → · Contrast checker → · Palette generator →