#1F177D#1F177D

#1F177D is a dark, vivid blue. Relative luminance 0.024; OKLCH L 30.4% C 0.161 H 274.6°. Best body text is #FFFFFF at 14.22:1 contrast (WCAG AA passes).

Color values

HEX	#1F177D
RGB	rgb(31, 23, 125)
HSL	hsl(245, 69%, 29%)
HSV	hsv(245, 82%, 49%)
CMYK	cmyk(75.2%, 81.6%, 0%, 51%)
CIE-LAB	lab(17.39, 37.93, -55.40)
CIE-LCH	lch(17.39, 67.14, 304.40°)
OKLab	oklab(30.45% 0.0129 -0.1602)
OKLCH	oklch(30.45% 0.161 274.6)
XYZ	xyz(4.5719, 2.3843, 19.6173)
Luminance	0.0238 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F177D #757D17

analogous

#17427D #1F177D #52177D

triadic

#1F177D #7D1F17 #177D1F

tetradic

#1F177D #7D1742 #757D17 #177D52

square

#1F177D #7D1742 #757D17 #177D52

split-complementary

#1F177D #7D5217 #427D17

monochromatic

#06051A #120D49 #1F177D #2C21B1 #4235DA

Accessibility & contrast

On white

14.22

#1F177D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.48

#1F177D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F177D

14.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F177D	#FFFFFF	#000000	##FFFFFF
##1F177D	1.00	14.22	1.48	14.22
#FFFFFF	14.22	1.00	21.00	1.00
#000000	1.48	21.00	1.00	21.00
##FFFFFF	14.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002F80

Deuteranopia (green-blind)

#00267B

Tritanopia (blue-blind)

#00364A

Achromatopsia (no color)

#2B2B2B

Design tokens & code

CSS

--color: #1f177d;
/* rgb */ color: rgb(31, 23, 125);
/* oklch */ color: oklch(30.4% 0.161 274.6);

Tailwind

colors: {
  custom: {
    50: '#6c57a4',
    500: '#1f177d',
    950: '#000000',
  },
}

SCSS

$custom: #1f177d;
$custom-light: #6c57a4;
$custom-dark: #000000;

JSON

{
  "hex": "#1f177d",
  "rgb": {
    "r": 31,
    "g": 23,
    "b": 125
  },
  "hsl": {
    "h": 244.706,
    "s": 68.919,
    "l": 29.02
  },
  "oklch": {
    "l": 0.30446,
    "c": 0.16073,
    "h": 274.6
  },
  "luminance": 0.02385
}

Semantic roles & 50–950 ramp

primary

#1F177D

secondary

#A9B23E

accent

#EC3CDE

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#08030F

muted

#7B787F

Preview Lab

Preview with #1F177D

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

Preview Lab → · Contrast checker → · Palette generator →