#171B5E#171B5E

#171B5E is a dark, moderate blue. Relative luminance 0.018; OKLCH L 27.0% C 0.117 H 272.9°. Best body text is #FFFFFF at 15.50:1 contrast (WCAG AA passes).

Color values

HEX	#171B5E
RGB	rgb(23, 27, 94)
HSL	hsl(237, 61%, 23%)
HSV	hsv(237, 76%, 37%)
CMYK	cmyk(75.5%, 71.3%, 0%, 63.1%)
CIE-LAB	lab(14.25, 23.38, -40.37)
CIE-LCH	lch(14.25, 46.65, 300.07°)
OKLab	oklab(27.04% 0.0059 -0.1167)
OKLCH	oklch(27.04% 0.117 272.9)
XYZ	xyz(2.7650, 1.7739, 10.7842)
Luminance	0.0177 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171B5E #5E5A17

analogous

#173E5E #171B5E #36175E

triadic

#171B5E #5E171B #1B5E17

tetradic

#171B5E #5E173E #5E5A17 #175E36

square

#171B5E #5E173E #5E5A17 #175E36

split-complementary

#171B5E #5E3617 #3E5E17

monochromatic

#060719 #0B0D2D #171B5E #23298F #2F37C0

Accessibility & contrast

On white

15.50

#171B5E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.35

#171B5E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171B5E

15.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171B5E	#FFFFFF	#000000	##FFFFFF
##171B5E	1.00	15.50	1.35	15.50
#FFFFFF	15.50	1.00	21.00	1.00
#000000	1.35	21.00	1.00	21.00
##FFFFFF	15.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002760

Deuteranopia (green-blind)

#00215D

Tritanopia (blue-blind)

#002D3A

Achromatopsia (no color)

#242424

Design tokens & code

CSS

--color: #171b5e;
/* rgb */ color: rgb(23, 27, 94);
/* oklch */ color: oklch(27.0% 0.117 272.9);

Tailwind

colors: {
  custom: {
    50: '#60578c',
    500: '#171b5e',
    950: '#000000',
  },
}

SCSS

$custom: #171b5e;
$custom-light: #60578c;
$custom-dark: #000000;

JSON

{
  "hex": "#171b5e",
  "rgb": {
    "r": 23,
    "g": 27,
    "b": 94
  },
  "hsl": {
    "h": 236.62,
    "s": 60.684,
    "l": 22.941
  },
  "oklch": {
    "l": 0.27037,
    "c": 0.11682,
    "h": 272.9
  },
  "luminance": 0.01774
}

Semantic roles & 50–950 ramp

primary

#171B5E

secondary

#95903C

accent

#DB44E4

background

#F6F5F8

surface

#EBE9F0

border

#C6C5CB

text

#05030C

muted

#7A787D

Preview Lab

Preview with #171B5E

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

Preview Lab → · Contrast checker → · Palette generator →