#172E55#172E55

#172E55 is a dark, moderate blue. Relative luminance 0.028; OKLCH L 30.5% C 0.076 H 260.3°. Best body text is #FFFFFF at 13.48:1 contrast (WCAG AA passes).

Color values

HEX	#172E55
RGB	rgb(23, 46, 85)
HSL	hsl(218, 57%, 21%)
HSV	hsv(218, 73%, 33%)
CMYK	cmyk(72.9%, 45.9%, 0%, 66.7%)
CIE-LAB	lab(19.19, 5.80, -26.37)
CIE-LCH	lch(19.19, 27.00, 282.40°)
OKLab	oklab(30.51% -0.0129 -0.0752)
OKLCH	oklch(30.51% 0.076 260.3)
XYZ	xyz(2.9695, 2.7917, 8.9749)
Luminance	0.0279 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172E55 #553E17

analogous

#174D55 #172E55 #1F1755

triadic

#172E55 #55172E #2E5517

tetradic

#172E55 #55174D #553E17 #17551F

square

#172E55 #55174D #553E17 #17551F

split-complementary

#172E55 #551F17 #4D5517

monochromatic

#070D18 #0A1425 #172E55 #244885 #3162B5

Accessibility & contrast

On white

13.48

#172E55 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.56

#172E55 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172E55

13.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172E55	#FFFFFF	#000000	##FFFFFF
##172E55	1.00	13.48	1.56	13.48
#FFFFFF	13.48	1.00	21.00	1.00
#000000	1.56	21.00	1.00	21.00
##FFFFFF	13.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1C3257

Deuteranopia (green-blind)

#122C54

Tritanopia (blue-blind)

#00373D

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #172e55;
/* rgb */ color: rgb(23, 46, 85);
/* oklch */ color: oklch(30.5% 0.076 260.3);

Tailwind

colors: {
  custom: {
    50: '#5c6685',
    500: '#172e55',
    950: '#000000',
  },
}

SCSS

$custom: #172e55;
$custom-light: #5c6685;
$custom-dark: #000000;

JSON

{
  "hex": "#172e55",
  "rgb": {
    "r": 23,
    "g": 46,
    "b": 85
  },
  "hsl": {
    "h": 217.742,
    "s": 57.407,
    "l": 21.176
  },
  "oklch": {
    "l": 0.30514,
    "c": 0.07634,
    "h": 260.3
  },
  "luminance": 0.02792
}

Semantic roles & 50–950 ramp

primary

#172E55

secondary

#8C6E3C

accent

#A847E1

background

#F5F6F8

surface

#E9EBEF

border

#C5C6CA

text

#04050B

muted

#797A7C

Preview Lab

Preview with #172E55

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

Preview Lab → · Contrast checker → · Palette generator →