#171F7E#171F7E

#171F7E is a dark, vivid blue. Relative luminance 0.027; OKLCH L 31.2% C 0.156 H 269.8°. Best body text is #FFFFFF at 13.69:1 contrast (WCAG AA passes).

Color values

HEX	#171F7E
RGB	rgb(23, 31, 126)
HSL	hsl(235, 69%, 29%)
HSV	hsv(235, 82%, 49%)
CMYK	cmyk(81.7%, 75.4%, 0%, 50.6%)
CIE-LAB	lab(18.66, 32.91, -53.94)
CIE-LCH	lch(18.66, 63.19, 301.39°)
OKLab	oklab(31.25% -0.0005 -0.1562)
OKLCH	oklch(31.25% 0.156 269.8)
XYZ	xyz(4.6079, 2.6680, 20.0067)
Luminance	0.0267 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171F7E #7E7617

analogous

#17537E #171F7E #43177E

triadic

#171F7E #7E171F #1F7E17

tetradic

#171F7E #7E1753 #7E7617 #177E43

square

#171F7E #7E1753 #7E7617 #177E43

split-complementary

#171F7E #7E4317 #537E17

monochromatic

#05061A #0E124A #171F7E #202CB2 #3542DA

Accessibility & contrast

On white

13.69

#171F7E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.53

#171F7E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171F7E

13.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171F7E	#FFFFFF	#000000	##FFFFFF
##171F7E	1.00	13.69	1.53	13.69
#FFFFFF	13.69	1.00	21.00	1.00
#000000	1.53	21.00	1.00	21.00
##FFFFFF	13.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003281

Deuteranopia (green-blind)

#00287C

Tritanopia (blue-blind)

#003A4C

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #171f7e;
/* rgb */ color: rgb(23, 31, 126);
/* oklch */ color: oklch(31.2% 0.156 269.8);

Tailwind

colors: {
  custom: {
    50: '#685ba4',
    500: '#171f7e',
    950: '#000000',
  },
}

SCSS

$custom: #171f7e;
$custom-light: #685ba4;
$custom-dark: #000000;

JSON

{
  "hex": "#171f7e",
  "rgb": {
    "r": 23,
    "g": 31,
    "b": 126
  },
  "hsl": {
    "h": 235.34,
    "s": 69.128,
    "l": 29.216
  },
  "oklch": {
    "l": 0.31249,
    "c": 0.15624,
    "h": 269.8
  },
  "luminance": 0.02668
}

Semantic roles & 50–950 ramp

primary

#171F7E

secondary

#B3AA3E

accent

#DE3CEC

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#07040F

muted

#7A797F

Preview Lab

Preview with #171F7E

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

Preview Lab → · Contrast checker → · Palette generator →