#172B5A#172B5A

#172B5A is a dark, moderate blue. Relative luminance 0.026; OKLCH L 30.2% C 0.088 H 264.4°. Best body text is #FFFFFF at 13.73:1 contrast (WCAG AA passes).

Color values

HEX	#172B5A
RGB	rgb(23, 43, 90)
HSL	hsl(222, 59%, 22%)
HSV	hsv(222, 74%, 35%)
CMYK	cmyk(74.4%, 52.2%, 0%, 64.7%)
CIE-LAB	lab(18.57, 10.07, -30.69)
CIE-LCH	lch(18.57, 32.30, 288.17°)
OKLab	oklab(30.15% -0.0086 -0.088)
OKLCH	oklch(30.15% 0.088 264.4)
XYZ	xyz(3.0620, 2.6478, 10.0206)
Luminance	0.0265 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172B5A #5A4617

analogous

#174C5A #172B5A #25175A

triadic

#172B5A #5A172B #2B5A17

tetradic

#172B5A #5A174C #5A4617 #175A25

square

#172B5A #5A174C #5A4617 #175A25

split-complementary

#172B5A #5A2517 #4C5A17

monochromatic

#060C18 #0B1429 #172B5A #23428B #305ABB

Accessibility & contrast

On white

13.73

#172B5A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.53

#172B5A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172B5A

13.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172B5A	#FFFFFF	#000000	##FFFFFF
##172B5A	1.00	13.73	1.53	13.73
#FFFFFF	13.73	1.00	21.00	1.00
#000000	1.53	21.00	1.00	21.00
##FFFFFF	13.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#11305C

Deuteranopia (green-blind)

#022A59

Tritanopia (blue-blind)

#00363E

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #172b5a;
/* rgb */ color: rgb(23, 43, 90);
/* oklch */ color: oklch(30.2% 0.088 264.4);

Tailwind

colors: {
  custom: {
    50: '#5e6389',
    500: '#172b5a',
    950: '#000000',
  },
}

SCSS

$custom: #172b5a;
$custom-light: #5e6389;
$custom-dark: #000000;

JSON

{
  "hex": "#172b5a",
  "rgb": {
    "r": 23,
    "g": 43,
    "b": 90
  },
  "hsl": {
    "h": 222.09,
    "s": 59.292,
    "l": 22.157
  },
  "oklch": {
    "l": 0.30155,
    "c": 0.08841,
    "h": 264.4
  },
  "luminance": 0.02648
}

Semantic roles & 50–950 ramp

primary

#172B5A

secondary

#91783C

accent

#B445E2

background

#F5F5F8

surface

#E9EAF0

border

#C5C6CB

text

#05050B

muted

#79797C

Preview Lab

Preview with #172B5A

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

Preview Lab → · Contrast checker → · Palette generator →