#1D177E#1D177E

#1D177E is a dark, vivid blue. Relative luminance 0.024; OKLCH L 30.4% C 0.163 H 273.5°. Best body text is #FFFFFF at 14.23:1 contrast (WCAG AA passes).

Color values

HEX	#1D177E
RGB	rgb(29, 23, 126)
HSL	hsl(243, 69%, 29%)
HSV	hsv(243, 82%, 49%)
CMYK	cmyk(77%, 81.7%, 0%, 50.6%)
CIE-LAB	lab(17.37, 38.10, -56.07)
CIE-LCH	lch(17.37, 67.79, 304.19°)
OKLab	oklab(30.43% 0.0099 -0.1622)
OKLCH	oklch(30.43% 0.163 273.5)
XYZ	xyz(4.5777, 2.3799, 19.9527)
Luminance	0.0238 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D177E #787E17

analogous

#17457E #1D177E #51177E

triadic

#1D177E #7E1D17 #177E1D

tetradic

#1D177E #7E1745 #787E17 #177E51

square

#1D177E #7E1745 #787E17 #177E51

split-complementary

#1D177E #7E5117 #457E17

monochromatic

#06051A #110E4A #1D177E #2920B2 #3F35DA

Accessibility & contrast

On white

14.23

#1D177E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.48

#1D177E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D177E

14.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D177E	#FFFFFF	#000000	##FFFFFF
##1D177E	1.00	14.23	1.48	14.23
#FFFFFF	14.23	1.00	21.00	1.00
#000000	1.48	21.00	1.00	21.00
##FFFFFF	14.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002F81

Deuteranopia (green-blind)

#00267C

Tritanopia (blue-blind)

#00374A

Achromatopsia (no color)

#2B2B2B

Design tokens & code

CSS

--color: #1d177e;
/* rgb */ color: rgb(29, 23, 126);
/* oklch */ color: oklch(30.4% 0.163 273.5);

Tailwind

colors: {
  custom: {
    50: '#6b57a5',
    500: '#1d177e',
    950: '#000000',
  },
}

SCSS

$custom: #1d177e;
$custom-light: #6b57a5;
$custom-dark: #000000;

JSON

{
  "hex": "#1d177e",
  "rgb": {
    "r": 29,
    "g": 23,
    "b": 126
  },
  "hsl": {
    "h": 243.495,
    "s": 69.128,
    "l": 29.216
  },
  "oklch": {
    "l": 0.30429,
    "c": 0.16252,
    "h": 273.5
  },
  "luminance": 0.0238
}

Semantic roles & 50–950 ramp

primary

#1D177E

secondary

#ACB33E

accent

#EC3CE2

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#08030F

muted

#7B787F

Preview Lab

Preview with #1D177E

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

Preview Lab → · Contrast checker → · Palette generator →