#171D5C#171D5C

#171D5C is a dark, moderate blue. Relative luminance 0.018; OKLCH L 27.2% C 0.111 H 272.3°. Best body text is #FFFFFF at 15.36:1 contrast (WCAG AA passes).

Color values

HEX	#171D5C
RGB	rgb(23, 29, 92)
HSL	hsl(235, 60%, 23%)
HSV	hsv(235, 75%, 36%)
CMYK	cmyk(75%, 68.5%, 0%, 63.9%)
CIE-LAB	lab(14.59, 21.17, -38.49)
CIE-LCH	lch(14.59, 43.93, 298.81°)
OKLab	oklab(27.22% 0.0046 -0.1111)
OKLCH	oklch(27.22% 0.111 272.3)
XYZ	xyz(2.7238, 1.8333, 10.3335)
Luminance	0.0183 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171D5C #5C5617

analogous

#173F5C #171D5C #34175C

triadic

#171D5C #5C171D #1D5C17

tetradic

#171D5C #5C173F #5C5617 #175C34

square

#171D5C #5C173F #5C5617 #175C34

split-complementary

#171D5C #5C3417 #3F5C17

monochromatic

#060818 #0B0E2B #171D5C #232C8D #2F3CBE

Accessibility & contrast

On white

15.36

#171D5C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.37

#171D5C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171D5C

15.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171D5C	#FFFFFF	#000000	##FFFFFF
##171D5C	1.00	15.36	1.37	15.36
#FFFFFF	15.36	1.00	21.00	1.00
#000000	1.37	21.00	1.00	21.00
##FFFFFF	15.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00285E

Deuteranopia (green-blind)

#00225B

Tritanopia (blue-blind)

#002D39

Achromatopsia (no color)

#252525

Design tokens & code

CSS

--color: #171d5c;
/* rgb */ color: rgb(23, 29, 92);
/* oklch */ color: oklch(27.2% 0.111 272.3);

Tailwind

colors: {
  custom: {
    50: '#5f598b',
    500: '#171d5c',
    950: '#000000',
  },
}

SCSS

$custom: #171d5c;
$custom-light: #5f598b;
$custom-dark: #000000;

JSON

{
  "hex": "#171d5c",
  "rgb": {
    "r": 23,
    "g": 29,
    "b": 92
  },
  "hsl": {
    "h": 234.783,
    "s": 60,
    "l": 22.549
  },
  "oklch": {
    "l": 0.27219,
    "c": 0.11123,
    "h": 272.3
  },
  "luminance": 0.01834
}

Semantic roles & 50–950 ramp

primary

#171D5C

secondary

#938B3C

accent

#D545E3

background

#F5F5F8

surface

#EAE9F0

border

#C6C5CB

text

#05030C

muted

#79787D

Preview Lab

Preview with #171D5C

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

Preview Lab → · Contrast checker → · Palette generator →