#172A58#172A58

#172A58 is a dark, moderate blue. Relative luminance 0.025; OKLCH L 29.8% C 0.087 H 264.8°. Best body text is #FFFFFF at 13.92:1 contrast (WCAG AA passes).

Color values

HEX	#172A58
RGB	rgb(23, 42, 88)
HSL	hsl(222, 59%, 22%)
HSV	hsv(222, 74%, 35%)
CMYK	cmyk(73.9%, 52.3%, 0%, 65.5%)
CIE-LAB	lab(18.11, 9.97, -30.10)
CIE-LCH	lch(18.11, 31.71, 288.32°)
OKLab	oklab(29.75% -0.0079 -0.0863)
OKLCH	oklch(29.75% 0.087 264.8)
XYZ	xyz(2.9421, 2.5424, 9.5663)
Luminance	0.0254 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172A58 #584517

analogous

#174B58 #172A58 #251758

triadic

#172A58 #58172A #2A5817

tetradic

#172A58 #58174B #584517 #175825

square

#172A58 #58174B #584517 #175825

split-complementary

#172A58 #582517 #4B5817

monochromatic

#060C18 #0A1327 #172A58 #244189 #3058B9

Accessibility & contrast

On white

13.92

#172A58 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.51

#172A58 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172A58

13.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172A58	#FFFFFF	#000000	##FFFFFF
##172A58	1.00	13.92	1.51	13.92
#FFFFFF	13.92	1.00	21.00	1.00
#000000	1.51	21.00	1.00	21.00
##FFFFFF	13.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#112F5A

Deuteranopia (green-blind)

#032957

Tritanopia (blue-blind)

#00353C

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #172a58;
/* rgb */ color: rgb(23, 42, 88);
/* oklch */ color: oklch(29.8% 0.087 264.8);

Tailwind

colors: {
  custom: {
    50: '#5d6387',
    500: '#172a58',
    950: '#000000',
  },
}

SCSS

$custom: #172a58;
$custom-light: #5d6387;
$custom-dark: #000000;

JSON

{
  "hex": "#172a58",
  "rgb": {
    "r": 23,
    "g": 42,
    "b": 88
  },
  "hsl": {
    "h": 222.462,
    "s": 58.559,
    "l": 21.765
  },
  "oklch": {
    "l": 0.29752,
    "c": 0.08666,
    "h": 264.8
  },
  "luminance": 0.02543
}

Semantic roles & 50–950 ramp

primary

#172A58

secondary

#8F773C

accent

#B446E2

background

#F5F5F8

surface

#E9EAEF

border

#C5C6CA

text

#05050B

muted

#79797C

Preview Lab

Preview with #172A58

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

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