#171F80#171F80

#171F80 is a dark, vivid blue. Relative luminance 0.027; OKLCH L 31.5% C 0.159 H 269.7°. Best body text is #FFFFFF at 13.60:1 contrast (WCAG AA passes).

Color values

HEX	#171F80
RGB	rgb(23, 31, 128)
HSL	hsl(235, 70%, 30%)
HSV	hsv(235, 82%, 50%)
CMYK	cmyk(82%, 75.8%, 0%, 49.8%)
CIE-LAB	lab(18.89, 33.65, -54.84)
CIE-LCH	lch(18.89, 64.34, 301.53°)
OKLab	oklab(31.48% -0.0008 -0.1589)
OKLCH	oklch(31.48% 0.159 269.7)
XYZ	xyz(4.7383, 2.7201, 20.6932)
Luminance	0.0272 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171F80 #807817

analogous

#175380 #171F80 #441780

triadic

#171F80 #80171F #1F8017

tetradic

#171F80 #801753 #807817 #178044

square

#171F80 #801753 #807817 #178044

split-complementary

#171F80 #804417 #538017

monochromatic

#05061A #0E124C #171F80 #202CB4 #3643DB

Accessibility & contrast

On white

13.60

#171F80 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.54

#171F80 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171F80

13.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171F80	#FFFFFF	#000000	##FFFFFF
##171F80	1.00	13.60	1.54	13.60
#FFFFFF	13.60	1.00	21.00	1.00
#000000	1.54	21.00	1.00	21.00
##FFFFFF	13.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003383

Deuteranopia (green-blind)

#00297E

Tritanopia (blue-blind)

#003B4D

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #171f80;
/* rgb */ color: rgb(23, 31, 128);
/* oklch */ color: oklch(31.5% 0.159 269.7);

Tailwind

colors: {
  custom: {
    50: '#695ba6',
    500: '#171f80',
    950: '#000000',
  },
}

SCSS

$custom: #171f80;
$custom-light: #695ba6;
$custom-dark: #000000;

JSON

{
  "hex": "#171f80",
  "rgb": {
    "r": 23,
    "g": 31,
    "b": 128
  },
  "hsl": {
    "h": 235.429,
    "s": 69.536,
    "l": 29.608
  },
  "oklch": {
    "l": 0.31476,
    "c": 0.15886,
    "h": 269.7
  },
  "luminance": 0.02721
}

Semantic roles & 50–950 ramp

primary

#171F80

secondary

#B4AB3E

accent

#DF3BEC

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#07040F

muted

#7A797F

Preview Lab

Preview with #171F80

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

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