#1D3383#1D3383

#1D3383 is a dark, vivid blue. Relative luminance 0.043; OKLCH L 35.8% C 0.137 H 267.2°. Best body text is #FFFFFF at 11.33:1 contrast (WCAG AA passes).

Color values

HEX	#1D3383
RGB	rgb(29, 51, 131)
HSL	hsl(227, 64%, 31%)
HSV	hsv(227, 78%, 51%)
CMYK	cmyk(77.9%, 61.1%, 0%, 48.6%)
CIE-LAB	lab(24.53, 21.97, -47.45)
CIE-LCH	lch(24.53, 52.29, 294.84°)
OKLab	oklab(35.78% -0.0067 -0.137)
OKLCH	oklch(35.78% 0.137 267.2)
XYZ	xyz(5.7858, 4.2669, 21.9870)
Luminance	0.0427 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3383 #836D1D

analogous

#1D6683 #1D3383 #3A1D83

triadic

#1D3383 #831D33 #33831D

tetradic

#1D3383 #831D66 #836D1D #1D833A

square

#1D3383 #831D66 #836D1D #1D833A

split-complementary

#1D3383 #833A1D #66831D

monochromatic

#070C1F #121F51 #1D3383 #2847B5 #4564D6

Accessibility & contrast

On white

11.33

#1D3383 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.85

#1D3383 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3383

11.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3383	#FFFFFF	#000000	##FFFFFF
##1D3383	1.00	11.33	1.85	11.33
#FFFFFF	11.33	1.00	21.00	1.00
#000000	1.85	21.00	1.00	21.00
##FFFFFF	11.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003F86

Deuteranopia (green-blind)

#003681

Tritanopia (blue-blind)

#004755

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #1d3383;
/* rgb */ color: rgb(29, 51, 131);
/* oklch */ color: oklch(35.8% 0.137 267.2);

Tailwind

colors: {
  custom: {
    50: '#6a6aa8',
    500: '#1d3383',
    950: '#000000',
  },
}

SCSS

$custom: #1d3383;
$custom-light: #6a6aa8;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3383",
  "rgb": {
    "r": 29,
    "g": 51,
    "b": 131
  },
  "hsl": {
    "h": 227.059,
    "s": 63.75,
    "l": 31.373
  },
  "oklch": {
    "l": 0.35775,
    "c": 0.13718,
    "h": 267.2
  },
  "luminance": 0.04268
}

Semantic roles & 50–950 ramp

primary

#1D3383

secondary

#B69E46

accent

#C341E7

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070610

muted

#7A7A7F

Preview Lab

Preview with #1D3383

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

Preview Lab → · Contrast checker → · Palette generator →