#172F55#172F55

#172F55 is a dark, moderate blue. Relative luminance 0.029; OKLCH L 30.8% C 0.075 H 259.2°. Best body text is #FFFFFF at 13.34:1 contrast (WCAG AA passes).

Color values

HEX	#172F55
RGB	rgb(23, 47, 85)
HSL	hsl(217, 57%, 21%)
HSV	hsv(217, 73%, 33%)
CMYK	cmyk(72.9%, 44.7%, 0%, 66.7%)
CIE-LAB	lab(19.52, 5.07, -25.84)
CIE-LCH	lch(19.52, 26.34, 281.11°)
OKLab	oklab(30.77% -0.014 -0.0737)
OKLCH	oklch(30.77% 0.075 259.2)
XYZ	xyz(3.0090, 2.8708, 8.9881)
Luminance	0.0287 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172F55 #553D17

analogous

#174E55 #172F55 #1E1755

triadic

#172F55 #55172F #2F5517

tetradic

#172F55 #55174E #553D17 #17551E

square

#172F55 #55174E #553D17 #17551E

split-complementary

#172F55 #551E17 #4E5517

monochromatic

#070D18 #0A1425 #172F55 #244A85 #3164B5

Accessibility & contrast

On white

13.34

#172F55 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.57

#172F55 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172F55

13.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172F55	#FFFFFF	#000000	##FFFFFF
##172F55	1.00	13.34	1.57	13.34
#FFFFFF	13.34	1.00	21.00	1.00
#000000	1.57	21.00	1.00	21.00
##FFFFFF	13.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1D3256

Deuteranopia (green-blind)

#142D54

Tritanopia (blue-blind)

#00383D

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #172f55;
/* rgb */ color: rgb(23, 47, 85);
/* oklch */ color: oklch(30.8% 0.075 259.2);

Tailwind

colors: {
  custom: {
    50: '#5c6785',
    500: '#172f55',
    950: '#000000',
  },
}

SCSS

$custom: #172f55;
$custom-light: #5c6785;
$custom-dark: #000000;

JSON

{
  "hex": "#172f55",
  "rgb": {
    "r": 23,
    "g": 47,
    "b": 85
  },
  "hsl": {
    "h": 216.774,
    "s": 57.407,
    "l": 21.176
  },
  "oklch": {
    "l": 0.30769,
    "c": 0.07501,
    "h": 259.2
  },
  "luminance": 0.02871
}

Semantic roles & 50–950 ramp

primary

#172F55

secondary

#8C6D3C

accent

#A547E1

background

#F5F6F8

surface

#E9EBEF

border

#C5C6CA

text

#04060B

muted

#797A7C

Preview Lab

Preview with #172F55

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

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