#172B5E#172B5E

#172B5E is a dark, moderate blue. Relative luminance 0.027; OKLCH L 30.5% C 0.095 H 265.1°. Best body text is #FFFFFF at 13.60:1 contrast (WCAG AA passes).

Color values

HEX	#172B5E
RGB	rgb(23, 43, 94)
HSL	hsl(223, 61%, 23%)
HSV	hsv(223, 76%, 37%)
CMYK	cmyk(75.5%, 54.3%, 0%, 63.1%)
CIE-LAB	lab(18.88, 11.74, -32.85)
CIE-LCH	lch(18.88, 34.89, 289.67°)
OKLab	oklab(30.48% -0.0081 -0.0944)
OKLCH	oklch(30.48% 0.095 265.1)
XYZ	xyz(3.2369, 2.7177, 10.9415)
Luminance	0.0272 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172B5E #5E4A17

analogous

#174E5E #172B5E #27175E

triadic

#172B5E #5E172B #2B5E17

tetradic

#172B5E #5E174E #5E4A17 #175E27

square

#172B5E #5E174E #5E4A17 #175E27

split-complementary

#172B5E #5E2717 #4E5E17

monochromatic

#060B19 #0B152D #172B5E #23418F #2F58C0

Accessibility & contrast

On white

13.60

#172B5E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.54

#172B5E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172B5E

13.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172B5E	#FFFFFF	#000000	##FFFFFF
##172B5E	1.00	13.60	1.54	13.60
#FFFFFF	13.60	1.00	21.00	1.00
#000000	1.54	21.00	1.00	21.00
##FFFFFF	13.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0C3160

Deuteranopia (green-blind)

#002B5D

Tritanopia (blue-blind)

#003740

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #172b5e;
/* rgb */ color: rgb(23, 43, 94);
/* oklch */ color: oklch(30.5% 0.095 265.1);

Tailwind

colors: {
  custom: {
    50: '#5f638c',
    500: '#172b5e',
    950: '#000000',
  },
}

SCSS

$custom: #172b5e;
$custom-light: #5f638c;
$custom-dark: #000000;

JSON

{
  "hex": "#172b5e",
  "rgb": {
    "r": 23,
    "g": 43,
    "b": 94
  },
  "hsl": {
    "h": 223.099,
    "s": 60.684,
    "l": 22.941
  },
  "oklch": {
    "l": 0.30481,
    "c": 0.09471,
    "h": 265.1
  },
  "luminance": 0.02718
}

Semantic roles & 50–950 ramp

primary

#172B5E

secondary

#957C3C

accent

#B744E4

background

#F5F5F8

surface

#EAEAF0

border

#C6C6CB

text

#05050C

muted

#79797D

Preview Lab

Preview with #172B5E

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

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