#171B56#171B56

#171B56 is a dark, moderate blue. Relative luminance 0.016; OKLCH L 26.2% C 0.105 H 273.6°. Best body text is #FFFFFF at 15.82:1 contrast (WCAG AA passes).

Color values

HEX	#171B56
RGB	rgb(23, 27, 86)
HSL	hsl(236, 58%, 21%)
HSV	hsv(236, 73%, 34%)
CMYK	cmyk(73.3%, 68.6%, 0%, 66.3%)
CIE-LAB	lab(13.46, 20.21, -36.30)
CIE-LCH	lch(13.46, 41.55, 299.11°)
OKLab	oklab(26.21% 0.0066 -0.1047)
OKLCH	oklch(26.21% 0.105 273.6)
XYZ	xyz(2.4244, 1.6377, 8.9906)
Luminance	0.0164 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171B56 #565217

analogous

#173B56 #171B56 #331756

triadic

#171B56 #56171B #1B5617

tetradic

#171B56 #56173B #565217 #175633

square

#171B56 #56173B #565217 #175633

split-complementary

#171B56 #563317 #3B5617

monochromatic

#060818 #0A0C26 #171B56 #242A86 #3139B7

Accessibility & contrast

On white

15.82

#171B56 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.33

#171B56 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171B56

15.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171B56	#FFFFFF	#000000	##FFFFFF
##171B56	1.00	15.82	1.33	15.82
#FFFFFF	15.82	1.00	21.00	1.00
#000000	1.33	21.00	1.00	21.00
##FFFFFF	15.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002558

Deuteranopia (green-blind)

#002055

Tritanopia (blue-blind)

#002A35

Achromatopsia (no color)

#222222

Design tokens & code

CSS

--color: #171b56;
/* rgb */ color: rgb(23, 27, 86);
/* oklch */ color: oklch(26.2% 0.105 273.6);

Tailwind

colors: {
  custom: {
    50: '#5e5786',
    500: '#171b56',
    950: '#000000',
  },
}

SCSS

$custom: #171b56;
$custom-light: #5e5786;
$custom-dark: #000000;

JSON

{
  "hex": "#171b56",
  "rgb": {
    "r": 23,
    "g": 27,
    "b": 86
  },
  "hsl": {
    "h": 236.19,
    "s": 57.798,
    "l": 21.373
  },
  "oklch": {
    "l": 0.26211,
    "c": 0.10495,
    "h": 273.6
  },
  "luminance": 0.01638
}

Semantic roles & 50–950 ramp

primary

#171B56

secondary

#8D883C

accent

#D747E1

background

#F5F5F8

surface

#EAE9EF

border

#C6C5CA

text

#05030B

muted

#79787C

Preview Lab

Preview with #171B56

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

Preview Lab → · Contrast checker → · Palette generator →