#171A55#171A55

#171A55 is a dark, moderate blue. Relative luminance 0.016; OKLCH L 25.9% C 0.105 H 274.2°. Best body text is #FFFFFF at 15.96:1 contrast (WCAG AA passes).

Color values

HEX	#171A55
RGB	rgb(23, 26, 85)
HSL	hsl(237, 57%, 21%)
HSV	hsv(237, 73%, 33%)
CMYK	cmyk(72.9%, 69.4%, 0%, 66.7%)
CIE-LAB	lab(13.09, 20.53, -36.23)
CIE-LCH	lch(13.09, 41.64, 299.54°)
OKLab	oklab(25.91% 0.0076 -0.1045)
OKLCH	oklch(25.91% 0.105 274.2)
XYZ	xyz(2.3619, 1.5766, 8.7724)
Luminance	0.0158 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171A55 #555217

analogous

#173955 #171A55 #331755

triadic

#171A55 #55171A #1A5517

tetradic

#171A55 #551739 #555217 #175533

square

#171A55 #551739 #555217 #175533

split-complementary

#171A55 #553317 #395517

monochromatic

#070718 #0A0B25 #171A55 #242985 #3137B5

Accessibility & contrast

On white

15.96

#171A55 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.32

#171A55 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171A55

15.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171A55	#FFFFFF	#000000	##FFFFFF
##171A55	1.00	15.96	1.32	15.96
#FFFFFF	15.96	1.00	21.00	1.00
#000000	1.32	21.00	1.00	21.00
##FFFFFF	15.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002557

Deuteranopia (green-blind)

#001F54

Tritanopia (blue-blind)

#002934

Achromatopsia (no color)

#222222

Design tokens & code

CSS

--color: #171a55;
/* rgb */ color: rgb(23, 26, 85);
/* oklch */ color: oklch(25.9% 0.105 274.2);

Tailwind

colors: {
  custom: {
    50: '#5e5685',
    500: '#171a55',
    950: '#000000',
  },
}

SCSS

$custom: #171a55;
$custom-light: #5e5685;
$custom-dark: #000000;

JSON

{
  "hex": "#171a55",
  "rgb": {
    "r": 23,
    "g": 26,
    "b": 85
  },
  "hsl": {
    "h": 237.097,
    "s": 57.407,
    "l": 21.176
  },
  "oklch": {
    "l": 0.2591,
    "c": 0.10482,
    "h": 274.2
  },
  "luminance": 0.01577
}

Semantic roles & 50–950 ramp

primary

#171A55

secondary

#8C883C

accent

#D947E1

background

#F5F5F8

surface

#E9E9EF

border

#C5C5CA

text

#05030B

muted

#79787C

Preview Lab

Preview with #171A55

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

Preview Lab → · Contrast checker → · Palette generator →