#171F74#171F74

#171F74 is a dark, vivid blue. Relative luminance 0.024; OKLCH L 30.1% C 0.143 H 270.3°. Best body text is #FFFFFF at 14.15:1 contrast (WCAG AA passes).

Color values

HEX	#171F74
RGB	rgb(23, 31, 116)
HSL	hsl(235, 67%, 27%)
HSV	hsv(235, 80%, 45%)
CMYK	cmyk(80.2%, 73.3%, 0%, 54.5%)
CIE-LAB	lab(17.56, 29.16, -49.35)
CIE-LCH	lch(17.56, 57.32, 300.58°)
OKLab	oklab(30.13% 0.0008 -0.1429)
OKLCH	oklch(30.13% 0.143 270.3)
XYZ	xyz(3.9946, 2.4226, 16.7767)
Luminance	0.0242 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171F74 #746C17

analogous

#174D74 #171F74 #3E1774

triadic

#171F74 #74171F #1F7417

tetradic

#171F74 #74174D #746C17 #17743E

square

#171F74 #74174D #746C17 #17743E

split-complementary

#171F74 #743E17 #4D7417

monochromatic

#05071A #0D1141 #171F74 #212DA7 #303ED6

Accessibility & contrast

On white

14.15

#171F74 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.48

#171F74 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171F74

14.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171F74	#FFFFFF	#000000	##FFFFFF
##171F74	1.00	14.15	1.48	14.15
#FFFFFF	14.15	1.00	21.00	1.00
#000000	1.48	21.00	1.00	21.00
##FFFFFF	14.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003077

Deuteranopia (green-blind)

#002772

Tritanopia (blue-blind)

#003747

Achromatopsia (no color)

#2B2B2B

Design tokens & code

CSS

--color: #171f74;
/* rgb */ color: rgb(23, 31, 116);
/* oklch */ color: oklch(30.1% 0.143 270.3);

Tailwind

colors: {
  custom: {
    50: '#665b9d',
    500: '#171f74',
    950: '#000000',
  },
}

SCSS

$custom: #171f74;
$custom-light: #665b9d;
$custom-dark: #000000;

JSON

{
  "hex": "#171f74",
  "rgb": {
    "r": 23,
    "g": 31,
    "b": 116
  },
  "hsl": {
    "h": 234.839,
    "s": 66.906,
    "l": 27.255
  },
  "oklch": {
    "l": 0.30134,
    "c": 0.14288,
    "h": 270.3
  },
  "luminance": 0.02423
}

Semantic roles & 50–950 ramp

primary

#171F74

secondary

#A9A03D

accent

#DB3EEA

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07040E

muted

#7A797E

Preview Lab

Preview with #171F74

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

Preview Lab → · Contrast checker → · Palette generator →