#172B4D#172B4D

#172B4D is a dark, moderate blue. Relative luminance 0.024; OKLCH L 29.2% C 0.068 H 260.4°. Best body text is #FFFFFF at 14.10:1 contrast (WCAG AA passes).

Color values

HEX	#172B4D
RGB	rgb(23, 43, 77)
HSL	hsl(218, 54%, 20%)
HSV	hsv(218, 70%, 30%)
CMYK	cmyk(70.1%, 44.2%, 0%, 69.8%)
CIE-LAB	lab(17.67, 4.67, -23.41)
CIE-LCH	lch(17.67, 23.87, 281.29°)
OKLab	oklab(29.17% -0.0113 -0.0666)
OKLCH	oklch(29.17% 0.068 260.4)
XYZ	xyz(2.5563, 2.4455, 7.3571)
Luminance	0.0245 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172B4D #4D3917

analogous

#17464D #172B4D #1E174D

triadic

#172B4D #4D172B #2B4D17

tetradic

#172B4D #4D1746 #4D3917 #174D1E

square

#172B4D #4D1746 #4D3917 #174D1E

split-complementary

#172B4D #4D1E17 #464D17

monochromatic

#070D18 #09111E #172B4D #25457C #3360AB

Accessibility & contrast

On white

14.10

#172B4D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.49

#172B4D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172B4D

14.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172B4D	#FFFFFF	#000000	##FFFFFF
##172B4D	1.00	14.10	1.49	14.10
#FFFFFF	14.10	1.00	21.00	1.00
#000000	1.49	21.00	1.00	21.00
##FFFFFF	14.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1C2E4E

Deuteranopia (green-blind)

#14294C

Tritanopia (blue-blind)

#003338

Achromatopsia (no color)

#2B2B2B

Design tokens & code

CSS

--color: #172b4d;
/* rgb */ color: rgb(23, 43, 77);
/* oklch */ color: oklch(29.2% 0.068 260.4);

Tailwind

colors: {
  custom: {
    50: '#5a637f',
    500: '#172b4d',
    950: '#000000',
  },
}

SCSS

$custom: #172b4d;
$custom-light: #5a637f;
$custom-dark: #000000;

JSON

{
  "hex": "#172b4d",
  "rgb": {
    "r": 23,
    "g": 43,
    "b": 77
  },
  "hsl": {
    "h": 217.778,
    "s": 54,
    "l": 19.608
  },
  "oklch": {
    "l": 0.29167,
    "c": 0.06756,
    "h": 260.4
  },
  "luminance": 0.02446
}

Semantic roles & 50–950 ramp

primary

#172B4D

secondary

#84693C

accent

#A74ADD

background

#F5F5F7

surface

#E9EAEE

border

#C5C6C9

text

#04050A

muted

#79797C

Preview Lab

Preview with #172B4D

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

Preview Lab → · Contrast checker → · Palette generator →