#172D5E#172D5E

#172D5E is a dark, moderate blue. Relative luminance 0.029; OKLCH L 31.0% C 0.092 H 263.7°. Best body text is #FFFFFF at 13.35:1 contrast (WCAG AA passes).

Color values

HEX	#172D5E
RGB	rgb(23, 45, 94)
HSL	hsl(221, 61%, 23%)
HSV	hsv(221, 76%, 37%)
CMYK	cmyk(75.5%, 52.1%, 0%, 63.1%)
CIE-LAB	lab(19.50, 10.28, -31.84)
CIE-LCH	lch(19.50, 33.46, 287.89°)
OKLab	oklab(30.96% -0.0101 -0.0914)
OKLCH	oklch(30.96% 0.092 263.7)
XYZ	xyz(3.3114, 2.8667, 10.9663)
Luminance	0.0287 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172D5E #5E4817

analogous

#17515E #172D5E #24175E

triadic

#172D5E #5E172D #2D5E17

tetradic

#172D5E #5E1751 #5E4817 #175E24

square

#172D5E #5E1751 #5E4817 #175E24

split-complementary

#172D5E #5E2417 #515E17

monochromatic

#060C19 #0B152D #172D5E #23458F #2F5CC0

Accessibility & contrast

On white

13.35

#172D5E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.57

#172D5E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172D5E

13.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172D5E	#FFFFFF	#000000	##FFFFFF
##172D5E	1.00	13.35	1.57	13.35
#FFFFFF	13.35	1.00	21.00	1.00
#000000	1.57	21.00	1.00	21.00
##FFFFFF	13.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#123360

Deuteranopia (green-blind)

#012C5D

Tritanopia (blue-blind)

#003941

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #172d5e;
/* rgb */ color: rgb(23, 45, 94);
/* oklch */ color: oklch(31.0% 0.092 263.7);

Tailwind

colors: {
  custom: {
    50: '#5e658c',
    500: '#172d5e',
    950: '#000000',
  },
}

SCSS

$custom: #172d5e;
$custom-light: #5e658c;
$custom-dark: #000000;

JSON

{
  "hex": "#172d5e",
  "rgb": {
    "r": 23,
    "g": 45,
    "b": 94
  },
  "hsl": {
    "h": 221.408,
    "s": 60.684,
    "l": 22.941
  },
  "oklch": {
    "l": 0.30959,
    "c": 0.09191,
    "h": 263.7
  },
  "luminance": 0.02867
}

Semantic roles & 50–950 ramp

primary

#172D5E

secondary

#95793C

accent

#B244E4

background

#F5F6F8

surface

#EAEBF0

border

#C6C6CB

text

#05050C

muted

#797A7D

Preview Lab

Preview with #172D5E

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

Preview Lab → · Contrast checker → · Palette generator →