#172E58#172E58

#172E58 is a dark, moderate blue. Relative luminance 0.028; OKLCH L 30.7% C 0.081 H 261.3°. Best body text is #FFFFFF at 13.39:1 contrast (WCAG AA passes).

Color values

HEX	#172E58
RGB	rgb(23, 46, 88)
HSL	hsl(219, 59%, 22%)
HSV	hsv(219, 74%, 35%)
CMYK	cmyk(73.9%, 47.7%, 0%, 65.5%)
CIE-LAB	lab(19.39, 7.04, -28.04)
CIE-LCH	lch(19.39, 28.91, 284.10°)
OKLab	oklab(30.74% -0.0122 -0.0802)
OKLCH	oklch(30.74% 0.081 261.3)
XYZ	xyz(3.0912, 2.8404, 9.6160)
Luminance	0.0284 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172E58 #584117

analogous

#174F58 #172E58 #211758

triadic

#172E58 #58172E #2E5817

tetradic

#172E58 #58174F #584117 #175821

square

#172E58 #58174F #584117 #175821

split-complementary

#172E58 #582117 #4F5817

monochromatic

#060D18 #0A1527 #172E58 #244789 #3061B9

Accessibility & contrast

On white

13.39

#172E58 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.57

#172E58 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172E58

13.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172E58	#FFFFFF	#000000	##FFFFFF
##172E58	1.00	13.39	1.57	13.39
#FFFFFF	13.39	1.00	21.00	1.00
#000000	1.57	21.00	1.00	21.00
##FFFFFF	13.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1A325A

Deuteranopia (green-blind)

#0E2C57

Tritanopia (blue-blind)

#00383E

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #172e58;
/* rgb */ color: rgb(23, 46, 88);
/* oklch */ color: oklch(30.7% 0.081 261.3);

Tailwind

colors: {
  custom: {
    50: '#5d6687',
    500: '#172e58',
    950: '#000000',
  },
}

SCSS

$custom: #172e58;
$custom-light: #5d6687;
$custom-dark: #000000;

JSON

{
  "hex": "#172e58",
  "rgb": {
    "r": 23,
    "g": 46,
    "b": 88
  },
  "hsl": {
    "h": 218.769,
    "s": 58.559,
    "l": 21.765
  },
  "oklch": {
    "l": 0.30737,
    "c": 0.08108,
    "h": 261.3
  },
  "luminance": 0.02841
}

Semantic roles & 50–950 ramp

primary

#172E58

secondary

#8F723C

accent

#AB46E2

background

#F5F6F8

surface

#E9EBEF

border

#C5C6CA

text

#05050B

muted

#797A7C

Preview Lab

Preview with #172E58

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

Preview Lab → · Contrast checker → · Palette generator →