#172B50#172B50

#172B50 is a dark, moderate blue. Relative luminance 0.025; OKLCH L 29.4% C 0.072 H 261.6°. Best body text is #FFFFFF at 14.02:1 contrast (WCAG AA passes).

Color values

HEX	#172B50
RGB	rgb(23, 43, 80)
HSL	hsl(219, 55%, 20%)
HSV	hsv(219, 71%, 31%)
CMYK	cmyk(71.2%, 46.2%, 0%, 68.6%)
CIE-LAB	lab(17.87, 5.91, -25.12)
CIE-LCH	lch(17.87, 25.81, 283.24°)
OKLab	oklab(29.39% -0.0106 -0.0716)
OKLCH	oklch(29.39% 0.072 261.6)
XYZ	xyz(2.6647, 2.4888, 7.9278)
Luminance	0.0249 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172B50 #503C17

analogous

#174850 #172B50 #1F1750

triadic

#172B50 #50172B #2B5017

tetradic

#172B50 #501748 #503C17 #17501F

square

#172B50 #501748 #503C17 #17501F

split-complementary

#172B50 #501F17 #485017

monochromatic

#070D18 #091120 #172B50 #254580 #325EAF

Accessibility & contrast

On white

14.02

#172B50 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.50

#172B50 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172B50

14.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172B50	#FFFFFF	#000000	##FFFFFF
##172B50	1.00	14.02	1.50	14.02
#FFFFFF	14.02	1.00	21.00	1.00
#000000	1.50	21.00	1.00	21.00
##FFFFFF	14.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1A2F51

Deuteranopia (green-blind)

#11294F

Tritanopia (blue-blind)

#003339

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #172b50;
/* rgb */ color: rgb(23, 43, 80);
/* oklch */ color: oklch(29.4% 0.072 261.6);

Tailwind

colors: {
  custom: {
    50: '#5b6381',
    500: '#172b50',
    950: '#000000',
  },
}

SCSS

$custom: #172b50;
$custom-light: #5b6381;
$custom-dark: #000000;

JSON

{
  "hex": "#172b50",
  "rgb": {
    "r": 23,
    "g": 43,
    "b": 80
  },
  "hsl": {
    "h": 218.947,
    "s": 55.34,
    "l": 20.196
  },
  "oklch": {
    "l": 0.29385,
    "c": 0.07241,
    "h": 261.6
  },
  "luminance": 0.02489
}

Semantic roles & 50–950 ramp

primary

#172B50

secondary

#876D3C

accent

#AA49DF

background

#F5F5F7

surface

#E9EAEE

border

#C5C6C9

text

#04050A

muted

#79797C

Preview Lab

Preview with #172B50

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

Preview Lab → · Contrast checker → · Palette generator →