#172F5C#172F5C

#172F5C is a dark, moderate blue. Relative luminance 0.030; OKLCH L 31.3% C 0.086 H 261.7°. Best body text is #FFFFFF at 13.14:1 contrast (WCAG AA passes).

Color values

HEX	#172F5C
RGB	rgb(23, 47, 92)
HSL	hsl(219, 60%, 23%)
HSV	hsv(219, 75%, 36%)
CMYK	cmyk(75%, 48.9%, 0%, 63.9%)
CIE-LAB	lab(19.99, 7.98, -29.73)
CIE-LCH	lch(19.99, 30.78, 285.03°)
OKLab	oklab(31.29% -0.0125 -0.0851)
OKLCH	oklch(31.29% 0.086 261.7)
XYZ	xyz(3.3009, 2.9876, 10.5258)
Luminance	0.0299 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172F5C #5C4417

analogous

#17525C #172F5C #21175C

triadic

#172F5C #5C172F #2F5C17

tetradic

#172F5C #5C1752 #5C4417 #175C21

square

#172F5C #5C1752 #5C4417 #175C21

split-complementary

#172F5C #5C2117 #525C17

monochromatic

#060D18 #0B162B #172F5C #23488D #2F61BE

Accessibility & contrast

On white

13.14

#172F5C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.60

#172F5C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172F5C

13.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172F5C	#FFFFFF	#000000	##FFFFFF
##172F5C	1.00	13.14	1.60	13.14
#FFFFFF	13.14	1.00	21.00	1.00
#000000	1.60	21.00	1.00	21.00
##FFFFFF	13.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#18345E

Deuteranopia (green-blind)

#0B2D5B

Tritanopia (blue-blind)

#003941

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #172f5c;
/* rgb */ color: rgb(23, 47, 92);
/* oklch */ color: oklch(31.3% 0.086 261.7);

Tailwind

colors: {
  custom: {
    50: '#5e678a',
    500: '#172f5c',
    950: '#000000',
  },
}

SCSS

$custom: #172f5c;
$custom-light: #5e678a;
$custom-dark: #000000;

JSON

{
  "hex": "#172f5c",
  "rgb": {
    "r": 23,
    "g": 47,
    "b": 92
  },
  "hsl": {
    "h": 219.13,
    "s": 60,
    "l": 22.549
  },
  "oklch": {
    "l": 0.31289,
    "c": 0.08602,
    "h": 261.7
  },
  "luminance": 0.02988
}

Semantic roles & 50–950 ramp

primary

#172F5C

secondary

#93753C

accent

#AC45E3

background

#F5F6F8

surface

#E9EBF0

border

#C5C6CB

text

#05060C

muted

#797A7D

Preview Lab

Preview with #172F5C

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

Preview Lab → · Contrast checker → · Palette generator →