#171B6D#171B6D

#171B6D is a dark, vivid blue. Relative luminance 0.021; OKLCH L 28.7% C 0.138 H 271.6°. Best body text is #FFFFFF at 14.85:1 contrast (WCAG AA passes).

Color values

HEX#171B6D
RGBrgb(23, 27, 109)
HSLhsl(237, 65%, 26%)
HSVhsv(237, 79%, 43%)
CMYKcmyk(78.9%, 75.2%, 0%, 57.3%)
CIE-LABlab(15.85, 29.14, -47.64)
CIE-LCHlch(15.85, 55.85, 301.45°)
OKLaboklab(28.67% 0.0039 -0.1379)
OKLCHoklch(28.67% 0.138 271.6)
XYZxyz(3.5047, 2.0698, 14.6798)
Luminance0.0207 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#171B6D #6D6917
analogous
#17466D #171B6D #3E176D
triadic
#171B6D #6D171B #1B6D17
tetradic
#171B6D #6D1746 #6D6917 #176D3E
square
#171B6D #6D1746 #6D6917 #176D3E
split-complementary
#171B6D #6D3E17 #466D17
monochromatic
#050619 #0C0E3A #171B6D #2228A0 #2C34D2

Accessibility & contrast

On white

14.85
#171B6D on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

1.41
#171B6D on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171B6D
14.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##171B6D#FFFFFF#000000##FFFFFF
##171B6D1.0014.851.4114.85
#FFFFFF14.851.0021.001.00
#0000001.4121.001.0021.00
##FFFFFF14.851.0021.001.00

Color blindness preview

Protanopia (red-blind)
#002C6F
Deuteranopia (green-blind)
#00236C
Tritanopia (blue-blind)
#003242
Achromatopsia (no color)
#272727

Design tokens & code

CSS
--color: #171b6d;
/* rgb */ color: rgb(23, 27, 109);
/* oklch */ color: oklch(28.7% 0.138 271.6);
Tailwind
colors: {
  custom: {
    50: '#645898',
    500: '#171b6d',
    950: '#000000',
  },
}
SCSS
$custom: #171b6d;
$custom-light: #645898;
$custom-dark: #000000;
JSON
{
  "hex": "#171b6d",
  "rgb": {
    "r": 23,
    "g": 27,
    "b": 109
  },
  "hsl": {
    "h": 237.209,
    "s": 65.152,
    "l": 25.882
  },
  "oklch": {
    "l": 0.28672,
    "c": 0.13795,
    "h": 271.6
  },
  "luminance": 0.0207
}

Semantic roles & 50–950 ramp

primary
#171B6D
secondary
#A39E3D
accent
#E040E8
background
#F6F5F9
surface
#EBE9F2
border
#C6C5CC
text
#06030E
muted
#7A787E

Preview Lab

Preview with #171B6D

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

Preview Lab → · Contrast checker → · Palette generator →

#171B6D Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva