#172C4F#172C4F

#172C4F is a dark, moderate blue. Relative luminance 0.025; OKLCH L 29.6% C 0.069 H 260.0°. Best body text is #FFFFFF at 13.91:1 contrast (WCAG AA passes).

Color values

HEX	#172C4F
RGB	rgb(23, 44, 79)
HSL	hsl(218, 55%, 20%)
HSV	hsv(218, 71%, 31%)
CMYK	cmyk(70.9%, 44.3%, 0%, 69%)
CIE-LAB	lab(18.13, 4.77, -24.02)
CIE-LCH	lch(18.13, 24.49, 281.23°)
OKLab	oklab(29.57% -0.012 -0.0684)
OKLCH	oklch(29.57% 0.069 260)
XYZ	xyz(2.6648, 2.5478, 7.7470)
Luminance	0.0255 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172C4F #4F3A17

analogous

#17484F #172C4F #1E174F

triadic

#172C4F #4F172C #2C4F17

tetradic

#172C4F #4F1748 #4F3A17 #174F1E

square

#172C4F #4F1748 #4F3A17 #174F1E

split-complementary

#172C4F #4F1E17 #484F17

monochromatic

#070D18 #091220 #172C4F #25467E #3361AE

Accessibility & contrast

On white

13.91

#172C4F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.51

#172C4F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172C4F

13.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172C4F	#FFFFFF	#000000	##FFFFFF
##172C4F	1.00	13.91	1.51	13.91
#FFFFFF	13.91	1.00	21.00	1.00
#000000	1.51	21.00	1.00	21.00
##FFFFFF	13.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1C2F50

Deuteranopia (green-blind)

#142A4E

Tritanopia (blue-blind)

#003439

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #172c4f;
/* rgb */ color: rgb(23, 44, 79);
/* oklch */ color: oklch(29.6% 0.069 260.0);

Tailwind

colors: {
  custom: {
    50: '#5b6480',
    500: '#172c4f',
    950: '#000000',
  },
}

SCSS

$custom: #172c4f;
$custom-light: #5b6480;
$custom-dark: #000000;

JSON

{
  "hex": "#172c4f",
  "rgb": {
    "r": 23,
    "g": 44,
    "b": 79
  },
  "hsl": {
    "h": 217.5,
    "s": 54.902,
    "l": 20
  },
  "oklch": {
    "l": 0.29568,
    "c": 0.06944,
    "h": 260
  },
  "luminance": 0.02548
}

Semantic roles & 50–950 ramp

primary

#172C4F

secondary

#866A3C

accent

#A64ADE

background

#F5F5F7

surface

#E9EAEE

border

#C5C6C9

text

#04050A

muted

#79797C

Preview Lab

Preview with #172C4F

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

Preview Lab → · Contrast checker → · Palette generator →