#171B45#171B45

#171B45 is a very dark, moderate blue. Relative luminance 0.014; OKLCH L 24.6% C 0.078 H 275.0°. Best body text is #FFFFFF at 16.42:1 contrast (WCAG AA passes).

Color values

HEX	#171B45
RGB	rgb(23, 27, 69)
HSL	hsl(235, 50%, 18%)
HSV	hsv(235, 67%, 27%)
CMYK	cmyk(66.7%, 60.9%, 0%, 72.9%)
CIE-LAB	lab(11.93, 13.36, -27.11)
CIE-LCH	lch(11.93, 30.23, 296.24°)
OKLab	oklab(24.6% 0.0068 -0.0777)
OKLCH	oklch(24.6% 0.078 275)
XYZ	xyz(1.8191, 1.3956, 5.8026)
Luminance	0.0140 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171B45 #454117

analogous

#173245 #171B45 #2A1745

triadic

#171B45 #45171B #1B4517

tetradic

#171B45 #451732 #454117 #17452A

square

#171B45 #451732 #454117 #17452A

split-complementary

#171B45 #452A17 #324517

monochromatic

#080917 #080917 #171B45 #262D73 #363FA1

Accessibility & contrast

On white

16.42

#171B45 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.28

#171B45 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171B45

16.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171B45	#FFFFFF	#000000	##FFFFFF
##171B45	1.00	16.42	1.28	16.42
#FFFFFF	16.42	1.00	21.00	1.00
#000000	1.28	21.00	1.00	21.00
##FFFFFF	16.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#022146

Deuteranopia (green-blind)

#001D44

Tritanopia (blue-blind)

#00252C

Achromatopsia (no color)

#1F1F1F

Design tokens & code

CSS

--color: #171b45;
/* rgb */ color: rgb(23, 27, 69);
/* oklch */ color: oklch(24.6% 0.078 275.0);

Tailwind

colors: {
  custom: {
    50: '#5a5779',
    500: '#171b45',
    950: '#000000',
  },
}

SCSS

$custom: #171b45;
$custom-light: #5a5779;
$custom-dark: #000000;

JSON

{
  "hex": "#171b45",
  "rgb": {
    "r": 23,
    "g": 27,
    "b": 69
  },
  "hsl": {
    "h": 234.783,
    "s": 50,
    "l": 18.039
  },
  "oklch": {
    "l": 0.24598,
    "c": 0.07803,
    "h": 275
  },
  "luminance": 0.01396
}

Semantic roles & 50–950 ramp

primary

#171B45

secondary

#7C763C

accent

#CD4EDA

background

#F5F5F7

surface

#E9E9ED

border

#C5C5C8

text

#040309

muted

#79787B

Preview Lab

Preview with #171B45

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

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