#171B70#171B70

#171B70 is a dark, vivid blue. Relative luminance 0.021; OKLCH L 29.0% C 0.142 H 271.4°. Best body text is #FFFFFF at 14.71:1 contrast (WCAG AA passes).

Color values

HEX	#171B70
RGB	rgb(23, 27, 112)
HSL	hsl(237, 66%, 26%)
HSV	hsv(237, 79%, 44%)
CMYK	cmyk(79.5%, 75.9%, 0%, 56.1%)
CIE-LAB	lab(16.18, 30.26, -49.04)
CIE-LCH	lch(16.18, 57.63, 301.68°)
OKLab	oklab(29.01% 0.0035 -0.142)
OKLCH	oklch(29.01% 0.142 271.4)
XYZ	xyz(3.6689, 2.1355, 15.5449)
Luminance	0.0214 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#171B70 #706C17

analogous

#174870 #171B70 #401770

triadic

#171B70 #70171B #1B7017

tetradic

#171B70 #701748 #706C17 #177040

square

#171B70 #701748 #706C17 #177040

split-complementary

#171B70 #704017 #487017

monochromatic

#050619 #0D0F3D #171B70 #2127A3 #2D35D4

Accessibility & contrast

On white

14.71

#171B70 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.43

#171B70 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #171B70

14.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##171B70	#FFFFFF	#000000	##FFFFFF
##171B70	1.00	14.71	1.43	14.71
#FFFFFF	14.71	1.00	21.00	1.00
#000000	1.43	21.00	1.00	21.00
##FFFFFF	14.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002C73

Deuteranopia (green-blind)

#00246E

Tritanopia (blue-blind)

#003343

Achromatopsia (no color)

#282828

Design tokens & code

CSS

--color: #171b70;
/* rgb */ color: rgb(23, 27, 112);
/* oklch */ color: oklch(29.0% 0.142 271.4);

Tailwind

colors: {
  custom: {
    50: '#65589a',
    500: '#171b70',
    950: '#000000',
  },
}

SCSS

$custom: #171b70;
$custom-light: #65589a;
$custom-dark: #000000;

JSON

{
  "hex": "#171b70",
  "rgb": {
    "r": 23,
    "g": 27,
    "b": 112
  },
  "hsl": {
    "h": 237.303,
    "s": 65.926,
    "l": 26.471
  },
  "oklch": {
    "l": 0.2901,
    "c": 0.14201,
    "h": 271.4
  },
  "luminance": 0.02136
}

Semantic roles & 50–950 ramp

primary

#171B70

secondary

#A6A13D

accent

#E13FE9

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07030E

muted

#7A787E

Preview Lab

Preview with #171B70

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

Preview Lab → · Contrast checker → · Palette generator →