#171B72#171B72

#171B72 is a dark, vivid blue. Relative luminance 0.022; OKLCH L 29.2% C 0.145 H 271.2°. Best body text is #FFFFFF at 14.62:1 contrast (WCAG AA passes).

Color values

HEX	#171B72
RGB	rgb(23, 27, 114)
HSL	hsl(237, 66%, 27%)
HSV	hsv(237, 80%, 45%)
CMYK	cmyk(79.8%, 76.3%, 0%, 55.3%)
CIE-LAB	lab(16.41, 31.00, -49.97)
CIE-LCH	lch(16.41, 58.81, 301.82°)
OKLab	oklab(29.24% 0.0031 -0.1447)
OKLCH	oklch(29.24% 0.145 271.2)
XYZ	xyz(3.7815, 2.1805, 16.1379)
Luminance	0.0218 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171B72 #726E17

analogous

#174972 #171B72 #411772

triadic

#171B72 #72171B #1B7217

tetradic

#171B72 #721749 #726E17 #177241

square

#171B72 #721749 #726E17 #177241

split-complementary

#171B72 #724117 #497217

monochromatic

#050619 #0D0F3F #171B72 #2127A5 #2E36D5

Accessibility & contrast

On white

14.62

#171B72 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.44

#171B72 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171B72

14.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171B72	#FFFFFF	#000000	##FFFFFF
##171B72	1.00	14.62	1.44	14.62
#FFFFFF	14.62	1.00	21.00	1.00
#000000	1.44	21.00	1.00	21.00
##FFFFFF	14.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002D75

Deuteranopia (green-blind)

#002470

Tritanopia (blue-blind)

#003445

Achromatopsia (no color)

#292929

Design tokens & code

CSS

--color: #171b72;
/* rgb */ color: rgb(23, 27, 114);
/* oklch */ color: oklch(29.2% 0.145 271.2);

Tailwind

colors: {
  custom: {
    50: '#66589c',
    500: '#171b72',
    950: '#000000',
  },
}

SCSS

$custom: #171b72;
$custom-light: #66589c;
$custom-dark: #000000;

JSON

{
  "hex": "#171b72",
  "rgb": {
    "r": 23,
    "g": 27,
    "b": 114
  },
  "hsl": {
    "h": 237.363,
    "s": 66.423,
    "l": 26.863
  },
  "oklch": {
    "l": 0.29238,
    "c": 0.14469,
    "h": 271.2
  },
  "luminance": 0.02181
}

Semantic roles & 50–950 ramp

primary

#171B72

secondary

#A8A33D

accent

#E23EE9

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07030E

muted

#7A787E

Preview Lab

Preview with #171B72

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

Preview Lab → · Contrast checker → · Palette generator →