#172D4F#172D4F

#172D4F is a dark, moderate blue. Relative luminance 0.026; OKLCH L 29.8% C 0.068 H 258.8°. Best body text is #FFFFFF at 13.77:1 contrast (WCAG AA passes).

Color values

HEX	#172D4F
RGB	rgb(23, 45, 79)
HSL	hsl(216, 55%, 20%)
HSV	hsv(216, 71%, 31%)
CMYK	cmyk(70.9%, 43%, 0%, 69%)
CIE-LAB	lab(18.47, 4.04, -23.49)
CIE-LCH	lch(18.47, 23.84, 279.77°)
OKLab	oklab(29.83% -0.0132 -0.0668)
OKLCH	oklch(29.83% 0.068 258.8)
XYZ	xyz(2.7025, 2.6232, 7.7595)
Luminance	0.0262 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172D4F #4F3917

analogous

#17494F #172D4F #1D174F

triadic

#172D4F #4F172D #2D4F17

tetradic

#172D4F #4F1749 #4F3917 #174F1D

square

#172D4F #4F1749 #4F3917 #174F1D

split-complementary

#172D4F #4F1D17 #494F17

monochromatic

#070D18 #091220 #172D4F #25487E #3363AE

Accessibility & contrast

On white

13.77

#172D4F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.52

#172D4F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172D4F

13.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172D4F	#FFFFFF	#000000	##FFFFFF
##172D4F	1.00	13.77	1.52	13.77
#FFFFFF	13.77	1.00	21.00	1.00
#000000	1.52	21.00	1.00	21.00
##FFFFFF	13.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1E3050

Deuteranopia (green-blind)

#162B4E

Tritanopia (blue-blind)

#00353A

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #172d4f;
/* rgb */ color: rgb(23, 45, 79);
/* oklch */ color: oklch(29.8% 0.068 258.8);

Tailwind

colors: {
  custom: {
    50: '#5b6580',
    500: '#172d4f',
    950: '#000000',
  },
}

SCSS

$custom: #172d4f;
$custom-light: #5b6580;
$custom-dark: #000000;

JSON

{
  "hex": "#172d4f",
  "rgb": {
    "r": 23,
    "g": 45,
    "b": 79
  },
  "hsl": {
    "h": 216.429,
    "s": 54.902,
    "l": 20
  },
  "oklch": {
    "l": 0.29827,
    "c": 0.06812,
    "h": 258.8
  },
  "luminance": 0.02623
}

Semantic roles & 50–950 ramp

primary

#172D4F

secondary

#86693C

accent

#A44ADE

background

#F5F6F7

surface

#E9EBEE

border

#C5C6C9

text

#04050A

muted

#797A7C

Preview Lab

Preview with #172D4F

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

Preview Lab → · Contrast checker → · Palette generator →