#1D3680#1D3680

#1D3680 is a dark, vivid blue. Relative luminance 0.045; OKLCH L 36.1% C 0.129 H 265.9°. Best body text is #FFFFFF at 11.10:1 contrast (WCAG AA passes).

Color values

HEX	#1D3680
RGB	rgb(29, 54, 128)
HSL	hsl(225, 63%, 31%)
HSV	hsv(225, 77%, 50%)
CMYK	cmyk(77.3%, 57.8%, 0%, 49.8%)
CIE-LAB	lab(25.13, 18.67, -44.60)
CIE-LCH	lch(25.13, 48.35, 292.71°)
OKLab	oklab(36.14% -0.0091 -0.1286)
OKLCH	oklch(36.14% 0.129 265.9)
XYZ	xyz(5.7208, 4.4574, 20.9768)
Luminance	0.0446 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3680 #80671D

analogous

#1D6780 #1D3680 #351D80

triadic

#1D3680 #801D36 #36801D

tetradic

#1D3680 #801D67 #80671D #1D8035

square

#1D3680 #801D67 #80671D #1D8035

split-complementary

#1D3680 #80351D #67801D

monochromatic

#060C1C #12214E #1D3680 #284BB2 #4368D4

Accessibility & contrast

On white

11.10

#1D3680 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.89

#1D3680 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3680

11.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3680	#FFFFFF	#000000	##FFFFFF
##1D3680	1.00	11.10	1.89	11.10
#FFFFFF	11.10	1.00	21.00	1.00
#000000	1.89	21.00	1.00	21.00
##FFFFFF	11.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004083

Deuteranopia (green-blind)

#00377F

Tritanopia (blue-blind)

#004855

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #1d3680;
/* rgb */ color: rgb(29, 54, 128);
/* oklch */ color: oklch(36.1% 0.129 265.9);

Tailwind

colors: {
  custom: {
    50: '#696ca5',
    500: '#1d3680',
    950: '#000000',
  },
}

SCSS

$custom: #1d3680;
$custom-light: #696ca5;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3680",
  "rgb": {
    "r": 29,
    "g": 54,
    "b": 128
  },
  "hsl": {
    "h": 224.848,
    "s": 63.057,
    "l": 30.784
  },
  "oklch": {
    "l": 0.36142,
    "c": 0.12892,
    "h": 265.9
  },
  "luminance": 0.04458
}

Semantic roles & 50–950 ramp

primary

#1D3680

secondary

#B39845

accent

#BD42E6

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #1D3680

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

Preview Lab → · Contrast checker → · Palette generator →