#173E80#173E80

#173E80 is a dark, vivid blue. Relative luminance 0.052; OKLCH L 37.7% C 0.120 H 260.3°. Best body text is #FFFFFF at 10.31:1 contrast (WCAG AA passes).

Color values

HEX	#173E80
RGB	rgb(23, 62, 128)
HSL	hsl(218, 70%, 30%)
HSV	hsv(218, 82%, 50%)
CMYK	cmyk(82%, 51.6%, 0%, 49.8%)
CIE-LAB	lab(27.26, 12.31, -41.16)
CIE-LCH	lch(27.26, 42.97, 286.65°)
OKLab	oklab(37.69% -0.0202 -0.1184)
OKLCH	oklch(37.69% 0.12 260.3)
XYZ	xyz(5.9708, 5.1852, 21.1040)
Luminance	0.0519 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173E80 #805917

analogous

#177380 #173E80 #241780

triadic

#173E80 #80173E #3E8017

tetradic

#173E80 #801773 #805917 #178024

square

#173E80 #801773 #805917 #178024

split-complementary

#173E80 #802417 #738017

monochromatic

#050D1A #0E254C #173E80 #2057B4 #3674DB

Accessibility & contrast

On white

10.31

#173E80 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.04

#173E80 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173E80

10.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173E80	#FFFFFF	#000000	##FFFFFF
##173E80	1.00	10.31	2.04	10.31
#FFFFFF	10.31	1.00	21.00	1.00
#000000	2.04	21.00	1.00	21.00
##FFFFFF	10.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#164582

Deuteranopia (green-blind)

#003C7F

Tritanopia (blue-blind)

#004E59

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #173e80;
/* rgb */ color: rgb(23, 62, 128);
/* oklch */ color: oklch(37.7% 0.120 260.3);

Tailwind

colors: {
  custom: {
    50: '#6672a5',
    500: '#173e80',
    950: '#000000',
  },
}

SCSS

$custom: #173e80;
$custom-light: #6672a5;
$custom-dark: #000000;

JSON

{
  "hex": "#173e80",
  "rgb": {
    "r": 23,
    "g": 62,
    "b": 128
  },
  "hsl": {
    "h": 217.714,
    "s": 69.536,
    "l": 29.608
  },
  "oklch": {
    "l": 0.37692,
    "c": 0.12017,
    "h": 260.3
  },
  "luminance": 0.05186
}

Semantic roles & 50–950 ramp

primary

#173E80

secondary

#B4893E

accent

#AB3BEC

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #173E80

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

Preview Lab → · Contrast checker → · Palette generator →