#172B5C#172B5C

#172B5C is a dark, moderate blue. Relative luminance 0.027; OKLCH L 30.3% C 0.092 H 264.8°. Best body text is #FFFFFF at 13.67:1 contrast (WCAG AA passes).

Color values

HEX	#172B5C
RGB	rgb(23, 43, 92)
HSL	hsl(223, 60%, 23%)
HSV	hsv(223, 75%, 36%)
CMYK	cmyk(75%, 53.3%, 0%, 63.9%)
CIE-LAB	lab(18.72, 10.91, -31.77)
CIE-LCH	lch(18.72, 33.59, 288.94°)
OKLab	oklab(30.32% -0.0083 -0.0912)
OKLCH	oklch(30.32% 0.092 264.8)
XYZ	xyz(3.1483, 2.6823, 10.4750)
Luminance	0.0268 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172B5C #5C4817

analogous

#174D5C #172B5C #26175C

triadic

#172B5C #5C172B #2B5C17

tetradic

#172B5C #5C174D #5C4817 #175C26

square

#172B5C #5C174D #5C4817 #175C26

split-complementary

#172B5C #5C2617 #4D5C17

monochromatic

#060B18 #0B142B #172B5C #23428D #2F59BE

Accessibility & contrast

On white

13.67

#172B5C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.54

#172B5C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172B5C

13.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172B5C	#FFFFFF	#000000	##FFFFFF
##172B5C	1.00	13.67	1.54	13.67
#FFFFFF	13.67	1.00	21.00	1.00
#000000	1.54	21.00	1.00	21.00
##FFFFFF	13.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0F315E

Deuteranopia (green-blind)

#002B5B

Tritanopia (blue-blind)

#00373F

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #172b5c;
/* rgb */ color: rgb(23, 43, 92);
/* oklch */ color: oklch(30.3% 0.092 264.8);

Tailwind

colors: {
  custom: {
    50: '#5e638a',
    500: '#172b5c',
    950: '#000000',
  },
}

SCSS

$custom: #172b5c;
$custom-light: #5e638a;
$custom-dark: #000000;

JSON

{
  "hex": "#172b5c",
  "rgb": {
    "r": 23,
    "g": 43,
    "b": 92
  },
  "hsl": {
    "h": 222.609,
    "s": 60,
    "l": 22.549
  },
  "oklch": {
    "l": 0.30317,
    "c": 0.09157,
    "h": 264.8
  },
  "luminance": 0.02683
}

Semantic roles & 50–950 ramp

primary

#172B5C

secondary

#937A3C

accent

#B545E3

background

#F5F5F8

surface

#EAEAF0

border

#C6C6CB

text

#05050C

muted

#79797D

Preview Lab

Preview with #172B5C

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

Preview Lab → · Contrast checker → · Palette generator →