#171E55#171E55

#171E55 is a dark, moderate blue. Relative luminance 0.018; OKLCH L 26.7% C 0.099 H 272.3°. Best body text is #FFFFFF at 15.52:1 contrast (WCAG AA passes).

Color values

HEX	#171E55
RGB	rgb(23, 30, 85)
HSL	hsl(233, 57%, 21%)
HSV	hsv(233, 73%, 33%)
CMYK	cmyk(72.9%, 64.7%, 0%, 66.7%)
CIE-LAB	lab(14.21, 17.62, -34.40)
CIE-LCH	lch(14.21, 38.65, 297.12°)
OKLab	oklab(26.74% 0.004 -0.0991)
OKLCH	oklch(26.74% 0.099 272.3)
XYZ	xyz(2.4568, 1.7664, 8.8040)
Luminance	0.0177 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171E55 #554E17

analogous

#173D55 #171E55 #2F1755

triadic

#171E55 #55171E #1E5517

tetradic

#171E55 #55173D #554E17 #17552F

square

#171E55 #55173D #554E17 #17552F

split-complementary

#171E55 #552F17 #3D5517

monochromatic

#070818 #0A0D25 #171E55 #242F85 #3140B5

Accessibility & contrast

On white

15.52

#171E55 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.35

#171E55 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171E55

15.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171E55	#FFFFFF	#000000	##FFFFFF
##171E55	1.00	15.52	1.35	15.52
#FFFFFF	15.52	1.00	21.00	1.00
#000000	1.35	21.00	1.00	21.00
##FFFFFF	15.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002757

Deuteranopia (green-blind)

#002154

Tritanopia (blue-blind)

#002C36

Achromatopsia (no color)

#242424

Design tokens & code

CSS

--color: #171e55;
/* rgb */ color: rgb(23, 30, 85);
/* oklch */ color: oklch(26.7% 0.099 272.3);

Tailwind

colors: {
  custom: {
    50: '#5d5985',
    500: '#171e55',
    950: '#000000',
  },
}

SCSS

$custom: #171e55;
$custom-light: #5d5985;
$custom-dark: #000000;

JSON

{
  "hex": "#171e55",
  "rgb": {
    "r": 23,
    "g": 30,
    "b": 85
  },
  "hsl": {
    "h": 233.226,
    "s": 57.407,
    "l": 21.176
  },
  "oklch": {
    "l": 0.26737,
    "c": 0.0992,
    "h": 272.3
  },
  "luminance": 0.01767
}

Semantic roles & 50–950 ramp

primary

#171E55

secondary

#8C833C

accent

#CF47E1

background

#F5F5F8

surface

#E9E9EF

border

#C5C5CA

text

#05030B

muted

#79787C

Preview Lab

Preview with #171E55

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

Preview Lab → · Contrast checker → · Palette generator →