#172C59#172C59

#172C59 is a dark, moderate blue. Relative luminance 0.027; OKLCH L 30.3% C 0.085 H 263.4°. Best body text is #FFFFFF at 13.63:1 contrast (WCAG AA passes).

Color values

HEX	#172C59
RGB	rgb(23, 44, 89)
HSL	hsl(221, 59%, 22%)
HSV	hsv(221, 74%, 35%)
CMYK	cmyk(74.2%, 50.6%, 0%, 65.1%)
CIE-LAB	lab(18.82, 8.92, -29.63)
CIE-LCH	lch(18.82, 30.94, 286.75°)
OKLab	oklab(30.32% -0.0099 -0.0849)
OKLCH	oklch(30.32% 0.085 263.4)
XYZ	xyz(3.0566, 2.7045, 9.8102)
Luminance	0.0271 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172C59 #594417

analogous

#174D59 #172C59 #231759

triadic

#172C59 #59172C #2C5917

tetradic

#172C59 #59174D #594417 #175923

square

#172C59 #59174D #594417 #175923

split-complementary

#172C59 #592317 #4D5917

monochromatic

#060C18 #0A1428 #172C59 #24448A #305CBA

Accessibility & contrast

On white

13.63

#172C59 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.54

#172C59 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172C59

13.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172C59	#FFFFFF	#000000	##FFFFFF
##172C59	1.00	13.63	1.54	13.63
#FFFFFF	13.63	1.00	21.00	1.00
#000000	1.54	21.00	1.00	21.00
##FFFFFF	13.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#15315B

Deuteranopia (green-blind)

#072B58

Tritanopia (blue-blind)

#00363E

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #172c59;
/* rgb */ color: rgb(23, 44, 89);
/* oklch */ color: oklch(30.3% 0.085 263.4);

Tailwind

colors: {
  custom: {
    50: '#5d6488',
    500: '#172c59',
    950: '#000000',
  },
}

SCSS

$custom: #172c59;
$custom-light: #5d6488;
$custom-dark: #000000;

JSON

{
  "hex": "#172c59",
  "rgb": {
    "r": 23,
    "g": 44,
    "b": 89
  },
  "hsl": {
    "h": 220.909,
    "s": 58.929,
    "l": 21.961
  },
  "oklch": {
    "l": 0.30319,
    "c": 0.08543,
    "h": 263.4
  },
  "luminance": 0.02705
}

Semantic roles & 50–950 ramp

primary

#172C59

secondary

#90753C

accent

#B046E2

background

#F5F5F8

surface

#E9EAF0

border

#C5C6CB

text

#05050B

muted

#79797C

Preview Lab

Preview with #172C59

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

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