#172A70#172A70

#172A70 is a dark, vivid blue. Relative luminance 0.030; OKLCH L 31.9% C 0.123 H 267.2°. Best body text is #FFFFFF at 13.11:1 contrast (WCAG AA passes).

Color values

HEX	#172A70
RGB	rgb(23, 42, 112)
HSL	hsl(227, 66%, 26%)
HSV	hsv(227, 79%, 44%)
CMYK	cmyk(79.5%, 62.5%, 0%, 56.1%)
CIE-LAB	lab(20.07, 19.93, -42.66)
CIE-LCH	lch(20.07, 47.09, 295.05°)
OKLab	oklab(31.85% -0.006 -0.1232)
OKLCH	oklch(31.85% 0.123 267.2)
XYZ	xyz(4.1049, 3.0075, 15.6903)
Luminance	0.0301 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172A70 #705D17

analogous

#175770 #172A70 #311770

triadic

#172A70 #70172A #2A7017

tetradic

#172A70 #701757 #705D17 #177031

square

#172A70 #701757 #705D17 #177031

split-complementary

#172A70 #703117 #577017

monochromatic

#050A19 #0D173D #172A70 #213DA3 #2D51D4

Accessibility & contrast

On white

13.11

#172A70 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.60

#172A70 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172A70

13.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172A70	#FFFFFF	#000000	##FFFFFF
##172A70	1.00	13.11	1.60	13.11
#FFFFFF	13.11	1.00	21.00	1.00
#000000	1.60	21.00	1.00	21.00
##FFFFFF	13.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003572

Deuteranopia (green-blind)

#002C6F

Tritanopia (blue-blind)

#003C48

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #172a70;
/* rgb */ color: rgb(23, 42, 112);
/* oklch */ color: oklch(31.9% 0.123 267.2);

Tailwind

colors: {
  custom: {
    50: '#63639a',
    500: '#172a70',
    950: '#000000',
  },
}

SCSS

$custom: #172a70;
$custom-light: #63639a;
$custom-dark: #000000;

JSON

{
  "hex": "#172a70",
  "rgb": {
    "r": 23,
    "g": 42,
    "b": 112
  },
  "hsl": {
    "h": 227.191,
    "s": 65.926,
    "l": 26.471
  },
  "oklch": {
    "l": 0.31854,
    "c": 0.12335,
    "h": 267.2
  },
  "luminance": 0.03008
}

Semantic roles & 50–950 ramp

primary

#172A70

secondary

#A68F3D

accent

#C53FE9

background

#F6F5F9

surface

#EBEAF2

border

#C6C6CC

text

#06050E

muted

#7A797E

Preview Lab

Preview with #172A70

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

Preview Lab → · Contrast checker → · Palette generator →