#172B4F#172B4F

#172B4F is a dark, moderate blue. Relative luminance 0.025; OKLCH L 29.3% C 0.071 H 261.2°. Best body text is #FFFFFF at 14.05:1 contrast (WCAG AA passes).

Color values

HEX	#172B4F
RGB	rgb(23, 43, 79)
HSL	hsl(219, 55%, 20%)
HSV	hsv(219, 71%, 31%)
CMYK	cmyk(70.9%, 45.6%, 0%, 69%)
CIE-LAB	lab(17.80, 5.50, -24.55)
CIE-LCH	lch(17.80, 25.16, 282.62°)
OKLab	oklab(29.31% -0.0108 -0.07)
OKLCH	oklch(29.31% 0.071 261.2)
XYZ	xyz(2.6280, 2.4742, 7.7347)
Luminance	0.0247 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172B4F #4F3B17

analogous

#17474F #172B4F #1F174F

triadic

#172B4F #4F172B #2B4F17

tetradic

#172B4F #4F1747 #4F3B17 #174F1F

square

#172B4F #4F1747 #4F3B17 #174F1F

split-complementary

#172B4F #4F1F17 #474F17

monochromatic

#070D18 #091120 #172B4F #25457E #335FAE

Accessibility & contrast

On white

14.05

#172B4F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.49

#172B4F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172B4F

14.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172B4F	#FFFFFF	#000000	##FFFFFF
##172B4F	1.00	14.05	1.49	14.05
#FFFFFF	14.05	1.00	21.00	1.00
#000000	1.49	21.00	1.00	21.00
##FFFFFF	14.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B2E50

Deuteranopia (green-blind)

#12294E

Tritanopia (blue-blind)

#003339

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #172b4f;
/* rgb */ color: rgb(23, 43, 79);
/* oklch */ color: oklch(29.3% 0.071 261.2);

Tailwind

colors: {
  custom: {
    50: '#5b6380',
    500: '#172b4f',
    950: '#000000',
  },
}

SCSS

$custom: #172b4f;
$custom-light: #5b6380;
$custom-dark: #000000;

JSON

{
  "hex": "#172b4f",
  "rgb": {
    "r": 23,
    "g": 43,
    "b": 79
  },
  "hsl": {
    "h": 218.571,
    "s": 54.902,
    "l": 20
  },
  "oklch": {
    "l": 0.29312,
    "c": 0.0708,
    "h": 261.2
  },
  "luminance": 0.02474
}

Semantic roles & 50–950 ramp

primary

#172B4F

secondary

#866C3C

accent

#A94ADE

background

#F5F5F7

surface

#E9EAEE

border

#C5C6C9

text

#04050A

muted

#79797C

Preview Lab

Preview with #172B4F

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

Preview Lab → · Contrast checker → · Palette generator →