#172D57#172D57

#172D57 is a dark, moderate blue. Relative luminance 0.027; OKLCH L 30.4% C 0.081 H 262.0°. Best body text is #FFFFFF at 13.55:1 contrast (WCAG AA passes).

Color values

HEX	#172D57
RGB	rgb(23, 45, 87)
HSL	hsl(219, 58%, 22%)
HSV	hsv(219, 74%, 34%)
CMYK	cmyk(73.6%, 48.3%, 0%, 65.9%)
CIE-LAB	lab(19.00, 7.35, -28.01)
CIE-LCH	lch(19.00, 28.96, 284.71°)
OKLab	oklab(30.41% -0.0113 -0.0801)
OKLCH	oklch(30.41% 0.081 262)
XYZ	xyz(3.0114, 2.7467, 9.3864)
Luminance	0.0275 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172D57 #574117

analogous

#174D57 #172D57 #211757

triadic

#172D57 #57172D #2D5717

tetradic

#172D57 #57174D #574117 #175721

square

#172D57 #57174D #574117 #175721

split-complementary

#172D57 #572117 #4D5717

monochromatic

#060D18 #0A1427 #172D57 #244687 #315FB8

Accessibility & contrast

On white

13.55

#172D57 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.55

#172D57 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172D57

13.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172D57	#FFFFFF	#000000	##FFFFFF
##172D57	1.00	13.55	1.55	13.55
#FFFFFF	13.55	1.00	21.00	1.00
#000000	1.55	21.00	1.00	21.00
##FFFFFF	13.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#183159

Deuteranopia (green-blind)

#0D2B56

Tritanopia (blue-blind)

#00373D

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #172d57;
/* rgb */ color: rgb(23, 45, 87);
/* oklch */ color: oklch(30.4% 0.081 262.0);

Tailwind

colors: {
  custom: {
    50: '#5d6587',
    500: '#172d57',
    950: '#000000',
  },
}

SCSS

$custom: #172d57;
$custom-light: #5d6587;
$custom-dark: #000000;

JSON

{
  "hex": "#172d57",
  "rgb": {
    "r": 23,
    "g": 45,
    "b": 87
  },
  "hsl": {
    "h": 219.375,
    "s": 58.182,
    "l": 21.569
  },
  "oklch": {
    "l": 0.30412,
    "c": 0.08088,
    "h": 262
  },
  "luminance": 0.02747
}

Semantic roles & 50–950 ramp

primary

#172D57

secondary

#8E723C

accent

#AC46E1

background

#F5F6F8

surface

#E9EBEF

border

#C5C6CA

text

#05050B

muted

#797A7C

Preview Lab

Preview with #172D57

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

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