#172B59#172B59

#172B59 is a dark, moderate blue. Relative luminance 0.026; OKLCH L 30.1% C 0.087 H 264.2°. Best body text is #FFFFFF at 13.76:1 contrast (WCAG AA passes).

Color values

HEX	#172B59
RGB	rgb(23, 43, 89)
HSL	hsl(222, 59%, 22%)
HSV	hsv(222, 74%, 35%)
CMYK	cmyk(74.2%, 51.7%, 0%, 65.1%)
CIE-LAB	lab(18.50, 9.65, -30.14)
CIE-LCH	lch(18.50, 31.65, 287.76°)
OKLab	oklab(30.08% -0.0088 -0.0864)
OKLCH	oklch(30.08% 0.087 264.2)
XYZ	xyz(3.0198, 2.6309, 9.7979)
Luminance	0.0263 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172B59 #594517

analogous

#174C59 #172B59 #241759

triadic

#172B59 #59172B #2B5917

tetradic

#172B59 #59174C #594517 #175924

square

#172B59 #59174C #594517 #175924

split-complementary

#172B59 #592417 #4C5917

monochromatic

#060C18 #0A1428 #172B59 #24428A #305ABA

Accessibility & contrast

On white

13.76

#172B59 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.53

#172B59 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172B59

13.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172B59	#FFFFFF	#000000	##FFFFFF
##172B59	1.00	13.76	1.53	13.76
#FFFFFF	13.76	1.00	21.00	1.00
#000000	1.53	21.00	1.00	21.00
##FFFFFF	13.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#12305B

Deuteranopia (green-blind)

#042A58

Tritanopia (blue-blind)

#00363D

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #172b59;
/* rgb */ color: rgb(23, 43, 89);
/* oklch */ color: oklch(30.1% 0.087 264.2);

Tailwind

colors: {
  custom: {
    50: '#5d6388',
    500: '#172b59',
    950: '#000000',
  },
}

SCSS

$custom: #172b59;
$custom-light: #5d6388;
$custom-dark: #000000;

JSON

{
  "hex": "#172b59",
  "rgb": {
    "r": 23,
    "g": 43,
    "b": 89
  },
  "hsl": {
    "h": 221.818,
    "s": 58.929,
    "l": 21.961
  },
  "oklch": {
    "l": 0.30075,
    "c": 0.08684,
    "h": 264.2
  },
  "luminance": 0.02631
}

Semantic roles & 50–950 ramp

primary

#172B59

secondary

#90763C

accent

#B346E2

background

#F5F5F8

surface

#E9EAF0

border

#C5C6CB

text

#05050B

muted

#79797C

Preview Lab

Preview with #172B59

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

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