#172B4E#172B4E

#172B4E is a dark, moderate blue. Relative luminance 0.025; OKLCH L 29.2% C 0.069 H 260.8°. Best body text is #FFFFFF at 14.08:1 contrast (WCAG AA passes).

Color values

HEX	#172B4E
RGB	rgb(23, 43, 78)
HSL	hsl(218, 54%, 20%)
HSV	hsv(218, 71%, 31%)
CMYK	cmyk(70.5%, 44.9%, 0%, 69.4%)
CIE-LAB	lab(17.74, 5.09, -23.98)
CIE-LCH	lch(17.74, 24.51, 281.98°)
OKLab	oklab(29.24% -0.0111 -0.0683)
OKLCH	oklch(29.24% 0.069 260.8)
XYZ	xyz(2.5919, 2.4597, 7.5444)
Luminance	0.0246 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172B4E #4E3A17

analogous

#17464E #172B4E #1F174E

triadic

#172B4E #4E172B #2B4E17

tetradic

#172B4E #4E1746 #4E3A17 #174E1F

square

#172B4E #4E1746 #4E3A17 #174E1F

split-complementary

#172B4E #4E1F17 #464E17

monochromatic

#070D18 #09111F #172B4E #25457D #335FAD

Accessibility & contrast

On white

14.08

#172B4E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.49

#172B4E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172B4E

14.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172B4E	#FFFFFF	#000000	##FFFFFF
##172B4E	1.00	14.08	1.49	14.08
#FFFFFF	14.08	1.00	21.00	1.00
#000000	1.49	21.00	1.00	21.00
##FFFFFF	14.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B2E4F

Deuteranopia (green-blind)

#13294D

Tritanopia (blue-blind)

#003338

Achromatopsia (no color)

#2B2B2B

Design tokens & code

CSS

--color: #172b4e;
/* rgb */ color: rgb(23, 43, 78);
/* oklch */ color: oklch(29.2% 0.069 260.8);

Tailwind

colors: {
  custom: {
    50: '#5b6380',
    500: '#172b4e',
    950: '#000000',
  },
}

SCSS

$custom: #172b4e;
$custom-light: #5b6380;
$custom-dark: #000000;

JSON

{
  "hex": "#172b4e",
  "rgb": {
    "r": 23,
    "g": 43,
    "b": 78
  },
  "hsl": {
    "h": 218.182,
    "s": 54.455,
    "l": 19.804
  },
  "oklch": {
    "l": 0.29239,
    "c": 0.06918,
    "h": 260.8
  },
  "luminance": 0.0246
}

Semantic roles & 50–950 ramp

primary

#172B4E

secondary

#856A3C

accent

#A84ADE

background

#F5F5F7

surface

#E9EAEE

border

#C5C6C9

text

#04050A

muted

#79797C

Preview Lab

Preview with #172B4E

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

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