#172F58#172F58

#172F58 is a dark, moderate blue. Relative luminance 0.029; OKLCH L 31.0% C 0.080 H 260.4°. Best body text is #FFFFFF at 13.26:1 contrast (WCAG AA passes).

Color values

HEX	#172F58
RGB	rgb(23, 47, 88)
HSL	hsl(218, 59%, 22%)
HSV	hsv(218, 74%, 35%)
CMYK	cmyk(73.9%, 46.6%, 0%, 65.5%)
CIE-LAB	lab(19.72, 6.32, -27.52)
CIE-LCH	lch(19.72, 28.24, 282.93°)
OKLab	oklab(30.99% -0.0133 -0.0786)
OKLCH	oklch(30.99% 0.08 260.4)
XYZ	xyz(3.1307, 2.9195, 9.6291)
Luminance	0.0292 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172F58 #584017

analogous

#175058 #172F58 #201758

triadic

#172F58 #58172F #2F5817

tetradic

#172F58 #581750 #584017 #175820

square

#172F58 #581750 #584017 #175820

split-complementary

#172F58 #582017 #505817

monochromatic

#060D18 #0A1527 #172F58 #244989 #3063B9

Accessibility & contrast

On white

13.26

#172F58 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.58

#172F58 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172F58

13.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172F58	#FFFFFF	#000000	##FFFFFF
##172F58	1.00	13.26	1.58	13.26
#FFFFFF	13.26	1.00	21.00	1.00
#000000	1.58	21.00	1.00	21.00
##FFFFFF	13.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B335A

Deuteranopia (green-blind)

#102D57

Tritanopia (blue-blind)

#00383F

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #172f58;
/* rgb */ color: rgb(23, 47, 88);
/* oklch */ color: oklch(31.0% 0.080 260.4);

Tailwind

colors: {
  custom: {
    50: '#5d6787',
    500: '#172f58',
    950: '#000000',
  },
}

SCSS

$custom: #172f58;
$custom-light: #5d6787;
$custom-dark: #000000;

JSON

{
  "hex": "#172f58",
  "rgb": {
    "r": 23,
    "g": 47,
    "b": 88
  },
  "hsl": {
    "h": 217.846,
    "s": 58.559,
    "l": 21.765
  },
  "oklch": {
    "l": 0.30988,
    "c": 0.07974,
    "h": 260.4
  },
  "luminance": 0.0292
}

Semantic roles & 50–950 ramp

primary

#172F58

secondary

#8F703C

accent

#A846E2

background

#F5F6F8

surface

#E9EBEF

border

#C5C6CA

text

#05060B

muted

#797A7C

Preview Lab

Preview with #172F58

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

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