#171F5F#171F5F

#171F5F is a dark, moderate blue. Relative luminance 0.020; OKLCH L 27.9% C 0.113 H 271.4°. Best body text is #FFFFFF at 15.03:1 contrast (WCAG AA passes).

Color values

HEX	#171F5F
RGB	rgb(23, 31, 95)
HSL	hsl(233, 61%, 23%)
HSV	hsv(233, 76%, 37%)
CMYK	cmyk(75.8%, 67.4%, 0%, 62.7%)
CIE-LAB	lab(15.42, 20.94, -39.12)
CIE-LCH	lch(15.42, 44.37, 298.15°)
OKLab	oklab(27.92% 0.0028 -0.113)
OKLCH	oklch(27.92% 0.113 271.4)
XYZ	xyz(2.9082, 1.9881, 11.0547)
Luminance	0.0199 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171F5F #5F5717

analogous

#17435F #171F5F #33175F

triadic

#171F5F #5F171F #1F5F17

tetradic

#171F5F #5F1743 #5F5717 #175F33

square

#171F5F #5F1743 #5F5717 #175F33

split-complementary

#171F5F #5F3317 #435F17

monochromatic

#060819 #0B0F2E #171F5F #232F90 #2F3FC2

Accessibility & contrast

On white

15.03

#171F5F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.40

#171F5F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171F5F

15.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171F5F	#FFFFFF	#000000	##FFFFFF
##171F5F	1.00	15.03	1.40	15.03
#FFFFFF	15.03	1.00	21.00	1.00
#000000	1.40	21.00	1.00	21.00
##FFFFFF	15.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002A61

Deuteranopia (green-blind)

#00235E

Tritanopia (blue-blind)

#002F3B

Achromatopsia (no color)

#272727

Design tokens & code

CSS

--color: #171f5f;
/* rgb */ color: rgb(23, 31, 95);
/* oklch */ color: oklch(27.9% 0.113 271.4);

Tailwind

colors: {
  custom: {
    50: '#605a8d',
    500: '#171f5f',
    950: '#000000',
  },
}

SCSS

$custom: #171f5f;
$custom-light: #605a8d;
$custom-dark: #000000;

JSON

{
  "hex": "#171f5f",
  "rgb": {
    "r": 23,
    "g": 31,
    "b": 95
  },
  "hsl": {
    "h": 233.333,
    "s": 61.017,
    "l": 23.137
  },
  "oklch": {
    "l": 0.27924,
    "c": 0.113,
    "h": 271.4
  },
  "luminance": 0.01988
}

Semantic roles & 50–950 ramp

primary

#171F5F

secondary

#968C3C

accent

#D244E4

background

#F6F5F8

surface

#EBE9F0

border

#C6C5CB

text

#05030C

muted

#7A787D

Preview Lab

Preview with #171F5F

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

Preview Lab → · Contrast checker → · Palette generator →