#170F40#170F40

#170F40 is a very dark, moderate blue. Relative luminance 0.009; OKLCH L 21.6% C 0.088 H 283.6°. Best body text is #FFFFFF at 17.81:1 contrast (WCAG AA passes).

Color values

HEX	#170F40
RGB	rgb(23, 15, 64)
HSL	hsl(250, 62%, 15%)
HSV	hsv(250, 77%, 25%)
CMYK	cmyk(64.1%, 76.6%, 0%, 74.9%)
CIE-LAB	lab(8.07, 20.22, -29.85)
CIE-LCH	lch(8.07, 36.05, 304.11°)
OKLab	oklab(21.62% 0.0208 -0.0859)
OKLCH	oklch(21.62% 0.088 283.6)
XYZ	xyz(1.4493, 0.8939, 4.9457)
Luminance	0.0089 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Navy Blue (survey)

#001146

ΔE00 4.16

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#170F40 #38400F

analogous

#0F1F40 #170F40 #2F0F40

triadic

#170F40 #40170F #0F4017

tetradic

#170F40 #400F1F #38400F #0F402F

square

#170F40 #400F1F #38400F #0F402F

split-complementary

#170F40 #402F0F #1F400F

monochromatic

#090619 #090619 #170F40 #291B72 #3B26A3

Accessibility & contrast

On white

17.81

#170F40 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.18

#170F40 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #170F40

17.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##170F40	#FFFFFF	#000000	##FFFFFF
##170F40	1.00	17.81	1.18	17.81
#FFFFFF	17.81	1.00	21.00	1.00
#000000	1.18	21.00	1.00	21.00
##FFFFFF	17.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001942

Deuteranopia (green-blind)

#00163F

Tritanopia (blue-blind)

#041C25

Achromatopsia (no color)

#181818

Design tokens & code

CSS

--color: #170f40;
/* rgb */ color: rgb(23, 15, 64);
/* oklch */ color: oklch(21.6% 0.088 283.6);

Tailwind

colors: {
  custom: {
    50: '#5a4e75',
    500: '#170f40',
    950: '#000000',
  },
}

SCSS

$custom: #170f40;
$custom-light: #5a4e75;
$custom-dark: #000000;

JSON

{
  "hex": "#170f40",
  "rgb": {
    "r": 23,
    "g": 15,
    "b": 64
  },
  "hsl": {
    "h": 249.796,
    "s": 62.025,
    "l": 15.49
  },
  "oklch": {
    "l": 0.2162,
    "c": 0.08835,
    "h": 283.6
  },
  "luminance": 0.00894
}

Semantic roles & 50–950 ramp

primary

#170F40

secondary

#6E7A30

accent

#E543CB

background

#F5F4F7

surface

#E9E7ED

border

#C5C3C8

text

#040108

muted

#79777B

Preview Lab

Preview with #170F40

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

Preview Lab → · Contrast checker → · Palette generator →