#172F57#172F57

#172F57 is a dark, moderate blue. Relative luminance 0.029; OKLCH L 30.9% C 0.078 H 260.0°. Best body text is #FFFFFF at 13.29:1 contrast (WCAG AA passes).

Color values

HEX	#172F57
RGB	rgb(23, 47, 87)
HSL	hsl(218, 58%, 22%)
HSV	hsv(218, 74%, 34%)
CMYK	cmyk(73.6%, 46%, 0%, 65.9%)
CIE-LAB	lab(19.65, 5.90, -26.96)
CIE-LCH	lch(19.65, 27.60, 282.35°)
OKLab	oklab(30.91% -0.0135 -0.077)
OKLCH	oklch(30.91% 0.078 260)
XYZ	xyz(3.0895, 2.9030, 9.4125)
Luminance	0.0290 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172F57 #573F17

analogous

#174F57 #172F57 #1F1757

triadic

#172F57 #57172F #2F5717

tetradic

#172F57 #57174F #573F17 #17571F

square

#172F57 #57174F #573F17 #17571F

split-complementary

#172F57 #571F17 #4F5717

monochromatic

#060D18 #0A1527 #172F57 #244987 #3163B8

Accessibility & contrast

On white

13.29

#172F57 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.58

#172F57 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172F57

13.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172F57	#FFFFFF	#000000	##FFFFFF
##172F57	1.00	13.29	1.58	13.29
#FFFFFF	13.29	1.00	21.00	1.00
#000000	1.58	21.00	1.00	21.00
##FFFFFF	13.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1C3359

Deuteranopia (green-blind)

#122D56

Tritanopia (blue-blind)

#00383E

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #172f57;
/* rgb */ color: rgb(23, 47, 87);
/* oklch */ color: oklch(30.9% 0.078 260.0);

Tailwind

colors: {
  custom: {
    50: '#5d6787',
    500: '#172f57',
    950: '#000000',
  },
}

SCSS

$custom: #172f57;
$custom-light: #5d6787;
$custom-dark: #000000;

JSON

{
  "hex": "#172f57",
  "rgb": {
    "r": 23,
    "g": 47,
    "b": 87
  },
  "hsl": {
    "h": 217.5,
    "s": 58.182,
    "l": 21.569
  },
  "oklch": {
    "l": 0.30914,
    "c": 0.07816,
    "h": 260
  },
  "luminance": 0.02903
}

Semantic roles & 50–950 ramp

primary

#172F57

secondary

#8E6F3C

accent

#A746E1

background

#F5F6F8

surface

#E9EBEF

border

#C5C6CA

text

#04060B

muted

#797A7C

Preview Lab

Preview with #172F57

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

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