#172A4D#172A4D

#172A4D is a dark, moderate blue. Relative luminance 0.024; OKLCH L 28.9% C 0.069 H 261.6°. Best body text is #FFFFFF at 14.24:1 contrast (WCAG AA passes).

Color values

HEX	#172A4D
RGB	rgb(23, 42, 77)
HSL	hsl(219, 54%, 20%)
HSV	hsv(219, 70%, 30%)
CMYK	cmyk(70.1%, 45.5%, 0%, 69.8%)
CIE-LAB	lab(17.34, 5.40, -23.94)
CIE-LCH	lch(17.34, 24.54, 282.72°)
OKLab	oklab(28.91% -0.0101 -0.0682)
OKLCH	oklch(28.91% 0.069 261.6)
XYZ	xyz(2.5204, 2.3737, 7.3451)
Luminance	0.0237 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172A4D #4D3A17

analogous

#17454D #172A4D #1F174D

triadic

#172A4D #4D172A #2A4D17

tetradic

#172A4D #4D1745 #4D3A17 #174D1F

square

#172A4D #4D1745 #4D3A17 #174D1F

split-complementary

#172A4D #4D1F17 #454D17

monochromatic

#070D18 #09101E #172A4D #25447C #335DAB

Accessibility & contrast

On white

14.24

#172A4D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.47

#172A4D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172A4D

14.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172A4D	#FFFFFF	#000000	##FFFFFF
##172A4D	1.00	14.24	1.47	14.24
#FFFFFF	14.24	1.00	21.00	1.00
#000000	1.47	21.00	1.00	21.00
##FFFFFF	14.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1A2D4E

Deuteranopia (green-blind)

#12284C

Tritanopia (blue-blind)

#003237

Achromatopsia (no color)

#2B2B2B

Design tokens & code

CSS

--color: #172a4d;
/* rgb */ color: rgb(23, 42, 77);
/* oklch */ color: oklch(28.9% 0.069 261.6);

Tailwind

colors: {
  custom: {
    50: '#5a637f',
    500: '#172a4d',
    950: '#000000',
  },
}

SCSS

$custom: #172a4d;
$custom-light: #5a637f;
$custom-dark: #000000;

JSON

{
  "hex": "#172a4d",
  "rgb": {
    "r": 23,
    "g": 42,
    "b": 77
  },
  "hsl": {
    "h": 218.889,
    "s": 54,
    "l": 19.608
  },
  "oklch": {
    "l": 0.2891,
    "c": 0.06892,
    "h": 261.6
  },
  "luminance": 0.02374
}

Semantic roles & 50–950 ramp

primary

#172A4D

secondary

#846B3C

accent

#AA4ADD

background

#F5F5F7

surface

#E9EAEE

border

#C5C6C9

text

#04050A

muted

#79797C

Preview Lab

Preview with #172A4D

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

Preview Lab → · Contrast checker → · Palette generator →