#1F179D#1F179D

#1F179D is a dark, vivid blue. Relative luminance 0.033; OKLCH L 34.3% C 0.199 H 271.3°. Best body text is #FFFFFF at 12.59:1 contrast (WCAG AA passes).

Color values

HEX	#1F179D
RGB	rgb(31, 23, 157)
HSL	hsl(244, 74%, 35%)
HSV	hsv(244, 85%, 62%)
CMYK	cmyk(80.3%, 85.4%, 0%, 38.4%)
CIE-LAB	lab(21.35, 48.15, -68.81)
CIE-LCH	lch(21.35, 83.99, 304.98°)
OKLab	oklab(34.33% 0.0046 -0.1991)
OKLCH	oklch(34.33% 0.199 271.3)
XYZ	xyz(6.9552, 3.3376, 32.1694)
Luminance	0.0334 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F179D #959D17

analogous

#17529D #1F179D #62179D

triadic

#1F179D #9D1F17 #179D1F

tetradic

#1F179D #9D1752 #959D17 #179D62

square

#1F179D #9D1752 #959D17 #179D62

split-complementary

#1F179D #9D6217 #529D17

monochromatic

#0A0732 #140F68 #1F179D #2A1FD2 #534AE4

Accessibility & contrast

On white

12.59

#1F179D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.67

#1F179D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F179D

12.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F179D	#FFFFFF	#000000	##FFFFFF
##1F179D	1.00	12.59	1.67	12.59
#FFFFFF	12.59	1.00	21.00	1.00
#000000	1.67	21.00	1.00	21.00
##FFFFFF	12.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003AA1

Deuteranopia (green-blind)

#002C9B

Tritanopia (blue-blind)

#00435D

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #1f179d;
/* rgb */ color: rgb(31, 23, 157);
/* oklch */ color: oklch(34.3% 0.199 271.3);

Tailwind

colors: {
  custom: {
    50: '#7459bb',
    500: '#1f179d',
    950: '#000000',
  },
}

SCSS

$custom: #1f179d;
$custom-light: #7459bb;
$custom-dark: #000000;

JSON

{
  "hex": "#1f179d",
  "rgb": {
    "r": 31,
    "g": 23,
    "b": 157
  },
  "hsl": {
    "h": 243.582,
    "s": 74.444,
    "l": 35.294
  },
  "oklch": {
    "l": 0.34332,
    "c": 0.19914,
    "h": 271.3
  },
  "luminance": 0.03338
}

Semantic roles & 50–950 ramp

primary

#1F179D

secondary

#BFC64A

accent

#F137E6

background

#F7F5FB

surface

#EEE9F7

border

#C9C5D0

text

#0A0412

muted

#7C7981

Preview Lab

Preview with #1F179D

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

Preview Lab → · Contrast checker → · Palette generator →