#1D3397#1D3397

#1D3397 is a dark, vivid blue. Relative luminance 0.049; OKLCH L 37.7% C 0.165 H 267.6°. Best body text is #FFFFFF at 10.65:1 contrast (WCAG AA passes).

Color values

HEX	#1D3397
RGB	rgb(29, 51, 151)
HSL	hsl(229, 68%, 35%)
HSV	hsv(229, 81%, 59%)
CMYK	cmyk(80.8%, 66.2%, 0%, 40.8%)
CIE-LAB	lab(26.34, 29.79, -56.89)
CIE-LCH	lch(26.34, 64.22, 297.64°)
OKLab	oklab(37.67% -0.007 -0.1647)
OKLCH	oklch(37.67% 0.165 267.6)
XYZ	xyz(7.2745, 4.8624, 29.8273)
Luminance	0.0486 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3397 #97811D

analogous

#1D7097 #1D3397 #441D97

triadic

#1D3397 #971D33 #33971D

tetradic

#1D3397 #971D70 #97811D #1D9744

square

#1D3397 #971D70 #97811D #1D9744

split-complementary

#1D3397 #97441D #70971D

monochromatic

#091030 #132264 #1D3397 #2744CA #516ADE

Accessibility & contrast

On white

10.65

#1D3397 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.97

#1D3397 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3397

10.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3397	#FFFFFF	#000000	##FFFFFF
##1D3397	1.00	10.65	1.97	10.65
#FFFFFF	10.65	1.00	21.00	1.00
#000000	1.97	21.00	1.00	21.00
##FFFFFF	10.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00449A

Deuteranopia (green-blind)

#003995

Tritanopia (blue-blind)

#004E60

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #1d3397;
/* rgb */ color: rgb(29, 51, 151);
/* oklch */ color: oklch(37.7% 0.165 267.6);

Tailwind

colors: {
  custom: {
    50: '#6f6ab7',
    500: '#1d3397',
    950: '#000000',
  },
}

SCSS

$custom: #1d3397;
$custom-light: #6f6ab7;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3397",
  "rgb": {
    "r": 29,
    "g": 51,
    "b": 151
  },
  "hsl": {
    "h": 229.18,
    "s": 67.778,
    "l": 35.294
  },
  "oklch": {
    "l": 0.37667,
    "c": 0.16485,
    "h": 267.6
  },
  "luminance": 0.04863
}

Semantic roles & 50–950 ramp

primary

#1D3397

secondary

#C0AC4F

accent

#CB3DEB

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#090611

muted

#7B7A80

Preview Lab

Preview with #1D3397

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

Preview Lab → · Contrast checker → · Palette generator →