#172B5F#172B5F

#172B5F is a dark, moderate blue. Relative luminance 0.027; OKLCH L 30.6% C 0.096 H 265.3°. Best body text is #FFFFFF at 13.57:1 contrast (WCAG AA passes).

Color values

HEX	#172B5F
RGB	rgb(23, 43, 95)
HSL	hsl(223, 61%, 23%)
HSV	hsv(223, 76%, 37%)
CMYK	cmyk(75.8%, 54.7%, 0%, 62.7%)
CIE-LAB	lab(18.95, 12.16, -33.39)
CIE-LCH	lch(18.95, 35.53, 290.01°)
OKLab	oklab(30.56% -0.0079 -0.0959)
OKLCH	oklch(30.56% 0.096 265.3)
XYZ	xyz(3.2821, 2.7358, 11.1793)
Luminance	0.0274 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172B5F #5F4B17

analogous

#174F5F #172B5F #27175F

triadic

#172B5F #5F172B #2B5F17

tetradic

#172B5F #5F174F #5F4B17 #175F27

square

#172B5F #5F174F #5F4B17 #175F27

split-complementary

#172B5F #5F2717 #4F5F17

monochromatic

#060B19 #0B152E #172B5F #234190 #2F58C2

Accessibility & contrast

On white

13.57

#172B5F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.55

#172B5F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172B5F

13.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172B5F	#FFFFFF	#000000	##FFFFFF
##172B5F	1.00	13.57	1.55	13.57
#FFFFFF	13.57	1.00	21.00	1.00
#000000	1.55	21.00	1.00	21.00
##FFFFFF	13.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0B3261

Deuteranopia (green-blind)

#002B5E

Tritanopia (blue-blind)

#003740

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #172b5f;
/* rgb */ color: rgb(23, 43, 95);
/* oklch */ color: oklch(30.6% 0.096 265.3);

Tailwind

colors: {
  custom: {
    50: '#5f638d',
    500: '#172b5f',
    950: '#000000',
  },
}

SCSS

$custom: #172b5f;
$custom-light: #5f638d;
$custom-dark: #000000;

JSON

{
  "hex": "#172b5f",
  "rgb": {
    "r": 23,
    "g": 43,
    "b": 95
  },
  "hsl": {
    "h": 223.333,
    "s": 61.017,
    "l": 23.137
  },
  "oklch": {
    "l": 0.30564,
    "c": 0.09627,
    "h": 265.3
  },
  "luminance": 0.02736
}

Semantic roles & 50–950 ramp

primary

#172B5F

secondary

#967D3C

accent

#B844E4

background

#F5F5F8

surface

#EAEAF0

border

#C6C6CB

text

#05050C

muted

#79797D

Preview Lab

Preview with #172B5F

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

Preview Lab → · Contrast checker → · Palette generator →