#171B5C#171B5C

#171B5C is a dark, moderate blue. Relative luminance 0.017; OKLCH L 26.8% C 0.114 H 273.1°. Best body text is #FFFFFF at 15.58:1 contrast (WCAG AA passes).

Color values

HEX	#171B5C
RGB	rgb(23, 27, 92)
HSL	hsl(237, 60%, 23%)
HSV	hsv(237, 75%, 36%)
CMYK	cmyk(75%, 70.7%, 0%, 63.9%)
CIE-LAB	lab(14.05, 22.59, -39.37)
CIE-LCH	lch(14.05, 45.39, 299.84°)
OKLab	oklab(26.83% 0.0062 -0.1137)
OKLCH	oklch(26.83% 0.114 273.1)
XYZ	xyz(2.6764, 1.7385, 10.3177)
Luminance	0.0174 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171B5C #5C5817

analogous

#173D5C #171B5C #36175C

triadic

#171B5C #5C171B #1B5C17

tetradic

#171B5C #5C173D #5C5817 #175C36

square

#171B5C #5C173D #5C5817 #175C36

split-complementary

#171B5C #5C3617 #3D5C17

monochromatic

#060718 #0B0D2B #171B5C #23298D #2F38BE

Accessibility & contrast

On white

15.58

#171B5C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.35

#171B5C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171B5C

15.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171B5C	#FFFFFF	#000000	##FFFFFF
##171B5C	1.00	15.58	1.35	15.58
#FFFFFF	15.58	1.00	21.00	1.00
#000000	1.35	21.00	1.00	21.00
##FFFFFF	15.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00275E

Deuteranopia (green-blind)

#00215B

Tritanopia (blue-blind)

#002C38

Achromatopsia (no color)

#242424

Design tokens & code

CSS

--color: #171b5c;
/* rgb */ color: rgb(23, 27, 92);
/* oklch */ color: oklch(26.8% 0.114 273.1);

Tailwind

colors: {
  custom: {
    50: '#5f578b',
    500: '#171b5c',
    950: '#000000',
  },
}

SCSS

$custom: #171b5c;
$custom-light: #5f578b;
$custom-dark: #000000;

JSON

{
  "hex": "#171b5c",
  "rgb": {
    "r": 23,
    "g": 27,
    "b": 92
  },
  "hsl": {
    "h": 236.522,
    "s": 60,
    "l": 22.549
  },
  "oklch": {
    "l": 0.26827,
    "c": 0.1139,
    "h": 273.1
  },
  "luminance": 0.01739
}

Semantic roles & 50–950 ramp

primary

#171B5C

secondary

#938E3C

accent

#DA45E3

background

#F5F5F8

surface

#EAE9F0

border

#C6C5CB

text

#05030C

muted

#79787D

Preview Lab

Preview with #171B5C

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

Preview Lab → · Contrast checker → · Palette generator →