#172A4B#172A4B

#172A4B is a dark, moderate blue. Relative luminance 0.023; OKLCH L 28.8% C 0.066 H 260.7°. Best body text is #FFFFFF at 14.29:1 contrast (WCAG AA passes).

Color values

HEX	#172A4B
RGB	rgb(23, 42, 75)
HSL	hsl(218, 53%, 19%)
HSV	hsv(218, 69%, 29%)
CMYK	cmyk(69.3%, 44%, 0%, 70.6%)
CIE-LAB	lab(17.21, 4.58, -22.79)
CIE-LCH	lch(17.21, 23.24, 281.38°)
OKLab	oklab(28.77% -0.0106 -0.0648)
OKLCH	oklch(28.77% 0.066 260.7)
XYZ	xyz(2.4509, 2.3459, 6.9789)
Luminance	0.0235 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172A4B #4B3817

analogous

#17444B #172A4B #1E174B

triadic

#172A4B #4B172A #2A4B17

tetradic

#172A4B #4B1744 #4B3817 #174B1E

square

#172A4B #4B1744 #4B3817 #174B1E

split-complementary

#172A4B #4B1E17 #444B17

monochromatic

#070D17 #09101C #172A4B #25447A #345EA9

Accessibility & contrast

On white

14.29

#172A4B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.47

#172A4B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172A4B

14.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172A4B	#FFFFFF	#000000	##FFFFFF
##172A4B	1.00	14.29	1.47	14.29
#FFFFFF	14.29	1.00	21.00	1.00
#000000	1.47	21.00	1.00	21.00
##FFFFFF	14.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B2D4C

Deuteranopia (green-blind)

#14284A

Tritanopia (blue-blind)

#003136

Achromatopsia (no color)

#2A2A2A

Design tokens & code

CSS

--color: #172a4b;
/* rgb */ color: rgb(23, 42, 75);
/* oklch */ color: oklch(28.8% 0.066 260.7);

Tailwind

colors: {
  custom: {
    50: '#5a637d',
    500: '#172a4b',
    950: '#000000',
  },
}

SCSS

$custom: #172a4b;
$custom-light: #5a637d;
$custom-dark: #000000;

JSON

{
  "hex": "#172a4b",
  "rgb": {
    "r": 23,
    "g": 42,
    "b": 75
  },
  "hsl": {
    "h": 218.077,
    "s": 53.061,
    "l": 19.216
  },
  "oklch": {
    "l": 0.28766,
    "c": 0.06566,
    "h": 260.7
  },
  "luminance": 0.02346
}

Semantic roles & 50–950 ramp

primary

#172A4B

secondary

#82683C

accent

#A74BDC

background

#F5F5F7

surface

#E9EAEE

border

#C5C6C9

text

#040509

muted

#79797B

Preview Lab

Preview with #172A4B

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

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