#172C58#172C58

#172C58 is a dark, moderate blue. Relative luminance 0.027; OKLCH L 30.2% C 0.084 H 263.1°. Best body text is #FFFFFF at 13.66:1 contrast (WCAG AA passes).

Color values

HEX	#172C58
RGB	rgb(23, 44, 88)
HSL	hsl(221, 59%, 22%)
HSV	hsv(221, 74%, 35%)
CMYK	cmyk(73.9%, 50%, 0%, 65.5%)
CIE-LAB	lab(18.75, 8.50, -29.08)
CIE-LCH	lch(18.75, 30.29, 286.30°)
OKLab	oklab(30.24% -0.01 -0.0832)
OKLCH	oklch(30.24% 0.084 263.1)
XYZ	xyz(3.0149, 2.6878, 9.5905)
Luminance	0.0269 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172C58 #584317

analogous

#174D58 #172C58 #221758

triadic

#172C58 #58172C #2C5817

tetradic

#172C58 #58174D #584317 #175822

square

#172C58 #58174D #584317 #175822

split-complementary

#172C58 #582217 #4D5817

monochromatic

#060C18 #0A1427 #172C58 #244489 #305DB9

Accessibility & contrast

On white

13.66

#172C58 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.54

#172C58 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172C58

13.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172C58	#FFFFFF	#000000	##FFFFFF
##172C58	1.00	13.66	1.54	13.66
#FFFFFF	13.66	1.00	21.00	1.00
#000000	1.54	21.00	1.00	21.00
##FFFFFF	13.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#16315A

Deuteranopia (green-blind)

#082B57

Tritanopia (blue-blind)

#00363D

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #172c58;
/* rgb */ color: rgb(23, 44, 88);
/* oklch */ color: oklch(30.2% 0.084 263.1);

Tailwind

colors: {
  custom: {
    50: '#5d6487',
    500: '#172c58',
    950: '#000000',
  },
}

SCSS

$custom: #172c58;
$custom-light: #5d6487;
$custom-dark: #000000;

JSON

{
  "hex": "#172c58",
  "rgb": {
    "r": 23,
    "g": 44,
    "b": 88
  },
  "hsl": {
    "h": 220.615,
    "s": 58.559,
    "l": 21.765
  },
  "oklch": {
    "l": 0.30241,
    "c": 0.08384,
    "h": 263.1
  },
  "luminance": 0.02688
}

Semantic roles & 50–950 ramp

primary

#172C58

secondary

#8F743C

accent

#AF46E2

background

#F5F5F8

surface

#E9EAEF

border

#C5C6CA

text

#05050B

muted

#79797C

Preview Lab

Preview with #172C58

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

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