#171F5C#171F5C

#171F5C is a dark, moderate blue. Relative luminance 0.019; OKLCH L 27.6% C 0.109 H 271.5°. Best body text is #FFFFFF at 15.14:1 contrast (WCAG AA passes).

Color values

HEX	#171F5C
RGB	rgb(23, 31, 92)
HSL	hsl(233, 60%, 23%)
HSV	hsv(233, 75%, 36%)
CMYK	cmyk(75%, 66.3%, 0%, 63.9%)
CIE-LAB	lab(15.14, 19.73, -37.59)
CIE-LCH	lch(15.14, 42.45, 297.69°)
OKLab	oklab(27.63% 0.0029 -0.1085)
OKLCH	oklch(27.63% 0.109 271.5)
XYZ	xyz(2.7744, 1.9346, 10.3503)
Luminance	0.0193 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171F5C #5C5417

analogous

#17425C #171F5C #31175C

triadic

#171F5C #5C171F #1F5C17

tetradic

#171F5C #5C1742 #5C5417 #175C31

square

#171F5C #5C1742 #5C5417 #175C31

split-complementary

#171F5C #5C3117 #425C17

monochromatic

#060818 #0B0F2B #171F5C #232F8D #2F40BE

Accessibility & contrast

On white

15.14

#171F5C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.39

#171F5C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171F5C

15.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171F5C	#FFFFFF	#000000	##FFFFFF
##171F5C	1.00	15.14	1.39	15.14
#FFFFFF	15.14	1.00	21.00	1.00
#000000	1.39	21.00	1.00	21.00
##FFFFFF	15.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00295E

Deuteranopia (green-blind)

#00235B

Tritanopia (blue-blind)

#002F3A

Achromatopsia (no color)

#262626

Design tokens & code

CSS

--color: #171f5c;
/* rgb */ color: rgb(23, 31, 92);
/* oklch */ color: oklch(27.6% 0.109 271.5);

Tailwind

colors: {
  custom: {
    50: '#5f5a8b',
    500: '#171f5c',
    950: '#000000',
  },
}

SCSS

$custom: #171f5c;
$custom-light: #5f5a8b;
$custom-dark: #000000;

JSON

{
  "hex": "#171f5c",
  "rgb": {
    "r": 23,
    "g": 31,
    "b": 92
  },
  "hsl": {
    "h": 233.043,
    "s": 60,
    "l": 22.549
  },
  "oklch": {
    "l": 0.27626,
    "c": 0.10851,
    "h": 271.5
  },
  "luminance": 0.01935
}

Semantic roles & 50–950 ramp

primary

#171F5C

secondary

#93893C

accent

#D145E3

background

#F5F5F8

surface

#EAE9F0

border

#C6C5CB

text

#05030C

muted

#79787D

Preview Lab

Preview with #171F5C

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

Preview Lab → · Contrast checker → · Palette generator →