#172B70#172B70

#172B70 is a dark, vivid blue. Relative luminance 0.031; OKLCH L 32.1% C 0.122 H 266.8°. Best body text is #FFFFFF at 13.00:1 contrast (WCAG AA passes).

Color values

HEX	#172B70
RGB	rgb(23, 43, 112)
HSL	hsl(227, 66%, 26%)
HSV	hsv(227, 79%, 44%)
CMYK	cmyk(79.5%, 61.6%, 0%, 56.1%)
CIE-LAB	lab(20.36, 19.22, -42.19)
CIE-LCH	lch(20.36, 46.36, 294.49°)
OKLab	oklab(32.07% -0.0067 -0.1218)
OKLCH	oklch(32.07% 0.122 266.8)
XYZ	xyz(4.1408, 3.0793, 15.7022)
Luminance	0.0308 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172B70 #705C17

analogous

#175870 #172B70 #301770

triadic

#172B70 #70172B #2B7017

tetradic

#172B70 #701758 #705C17 #177030

square

#172B70 #701758 #705C17 #177030

split-complementary

#172B70 #703017 #587017

monochromatic

#050A19 #0D183D #172B70 #213EA3 #2D53D4

Accessibility & contrast

On white

13.00

#172B70 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.62

#172B70 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172B70

13.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172B70	#FFFFFF	#000000	##FFFFFF
##172B70	1.00	13.00	1.62	13.00
#FFFFFF	13.00	1.00	21.00	1.00
#000000	1.62	21.00	1.00	21.00
##FFFFFF	13.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003572

Deuteranopia (green-blind)

#002D6F

Tritanopia (blue-blind)

#003C49

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #172b70;
/* rgb */ color: rgb(23, 43, 112);
/* oklch */ color: oklch(32.1% 0.122 266.8);

Tailwind

colors: {
  custom: {
    50: '#63649a',
    500: '#172b70',
    950: '#000000',
  },
}

SCSS

$custom: #172b70;
$custom-light: #63649a;
$custom-dark: #000000;

JSON

{
  "hex": "#172b70",
  "rgb": {
    "r": 23,
    "g": 43,
    "b": 112
  },
  "hsl": {
    "h": 226.517,
    "s": 65.926,
    "l": 26.471
  },
  "oklch": {
    "l": 0.32067,
    "c": 0.12202,
    "h": 266.8
  },
  "luminance": 0.0308
}

Semantic roles & 50–950 ramp

primary

#172B70

secondary

#A68E3D

accent

#C33FE9

background

#F6F5F9

surface

#EBEAF2

border

#C6C6CC

text

#06050E

muted

#7A797E

Preview Lab

Preview with #172B70

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

Preview Lab → · Contrast checker → · Palette generator →