#171F7F#171F7F

#171F7F is a dark, vivid blue. Relative luminance 0.027; OKLCH L 31.4% C 0.158 H 269.7°. Best body text is #FFFFFF at 13.65:1 contrast (WCAG AA passes).

Color values

HEX	#171F7F
RGB	rgb(23, 31, 127)
HSL	hsl(235, 69%, 29%)
HSV	hsv(235, 82%, 50%)
CMYK	cmyk(81.9%, 75.6%, 0%, 50.2%)
CIE-LAB	lab(18.77, 33.28, -54.39)
CIE-LCH	lch(18.77, 63.77, 301.46°)
OKLab	oklab(31.36% -0.0007 -0.1575)
OKLCH	oklch(31.36% 0.158 269.7)
XYZ	xyz(4.6728, 2.6939, 20.3483)
Luminance	0.0269 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171F7F #7F7717

analogous

#17537F #171F7F #43177F

triadic

#171F7F #7F171F #1F7F17

tetradic

#171F7F #7F1753 #7F7717 #177F43

square

#171F7F #7F1753 #7F7717 #177F43

split-complementary

#171F7F #7F4317 #537F17

monochromatic

#05061A #0E124B #171F7F #202CB3 #3643DB

Accessibility & contrast

On white

13.65

#171F7F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.54

#171F7F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171F7F

13.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171F7F	#FFFFFF	#000000	##FFFFFF
##171F7F	1.00	13.65	1.54	13.65
#FFFFFF	13.65	1.00	21.00	1.00
#000000	1.54	21.00	1.00	21.00
##FFFFFF	13.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003382

Deuteranopia (green-blind)

#00287D

Tritanopia (blue-blind)

#003B4D

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #171f7f;
/* rgb */ color: rgb(23, 31, 127);
/* oklch */ color: oklch(31.4% 0.158 269.7);

Tailwind

colors: {
  custom: {
    50: '#695ba5',
    500: '#171f7f',
    950: '#000000',
  },
}

SCSS

$custom: #171f7f;
$custom-light: #695ba5;
$custom-dark: #000000;

JSON

{
  "hex": "#171f7f",
  "rgb": {
    "r": 23,
    "g": 31,
    "b": 127
  },
  "hsl": {
    "h": 235.385,
    "s": 69.333,
    "l": 29.412
  },
  "oklch": {
    "l": 0.31362,
    "c": 0.15755,
    "h": 269.7
  },
  "luminance": 0.02694
}

Semantic roles & 50–950 ramp

primary

#171F7F

secondary

#B4AB3E

accent

#DF3CEC

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#07040F

muted

#7A797F

Preview Lab

Preview with #171F7F

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

Preview Lab → · Contrast checker → · Palette generator →