#171B5D#171B5D

#171B5D is a dark, moderate blue. Relative luminance 0.018; OKLCH L 26.9% C 0.115 H 273.0°. Best body text is #FFFFFF at 15.54:1 contrast (WCAG AA passes).

Color values

HEX	#171B5D
RGB	rgb(23, 27, 93)
HSL	hsl(237, 60%, 23%)
HSV	hsv(237, 75%, 36%)
CMYK	cmyk(75.3%, 71%, 0%, 63.5%)
CIE-LAB	lab(14.15, 22.98, -39.87)
CIE-LCH	lch(14.15, 46.02, 299.96°)
OKLab	oklab(26.93% 0.0061 -0.1152)
OKLCH	oklch(26.93% 0.115 273)
XYZ	xyz(2.7204, 1.7561, 10.5494)
Luminance	0.0176 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171B5D #5D5917

analogous

#173E5D #171B5D #36175D

triadic

#171B5D #5D171B #1B5D17

tetradic

#171B5D #5D173E #5D5917 #175D36

square

#171B5D #5D173E #5D5917 #175D36

split-complementary

#171B5D #5D3617 #3E5D17

monochromatic

#060719 #0B0D2C #171B5D #23298E #2F37BF

Accessibility & contrast

On white

15.54

#171B5D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.35

#171B5D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171B5D

15.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171B5D	#FFFFFF	#000000	##FFFFFF
##171B5D	1.00	15.54	1.35	15.54
#FFFFFF	15.54	1.00	21.00	1.00
#000000	1.35	21.00	1.00	21.00
##FFFFFF	15.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00275F

Deuteranopia (green-blind)

#00215C

Tritanopia (blue-blind)

#002C39

Achromatopsia (no color)

#242424

Design tokens & code

CSS

--color: #171b5d;
/* rgb */ color: rgb(23, 27, 93);
/* oklch */ color: oklch(26.9% 0.115 273.0);

Tailwind

colors: {
  custom: {
    50: '#60578c',
    500: '#171b5d',
    950: '#000000',
  },
}

SCSS

$custom: #171b5d;
$custom-light: #60578c;
$custom-dark: #000000;

JSON

{
  "hex": "#171b5d",
  "rgb": {
    "r": 23,
    "g": 27,
    "b": 93
  },
  "hsl": {
    "h": 236.571,
    "s": 60.345,
    "l": 22.745
  },
  "oklch": {
    "l": 0.26931,
    "c": 0.11536,
    "h": 273
  },
  "luminance": 0.01756
}

Semantic roles & 50–950 ramp

primary

#171B5D

secondary

#948F3C

accent

#DA44E3

background

#F6F5F8

surface

#EBE9F0

border

#C6C5CB

text

#05030C

muted

#7A787D

Preview Lab

Preview with #171B5D

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

Preview Lab → · Contrast checker → · Palette generator →