#1D3FA6#1D3FA6

#1D3FA6 is a dark, vivid blue. Relative luminance 0.066; OKLCH L 41.4% C 0.170 H 265.3°. Best body text is #FFFFFF at 9.08:1 contrast (WCAG AA passes).

Color values

HEX	#1D3FA6
RGB	rgb(29, 63, 166)
HSL	hsl(225, 70%, 38%)
HSV	hsv(225, 83%, 65%)
CMYK	cmyk(82.5%, 62%, 0%, 34.9%)
CIE-LAB	lab(30.80, 27.54, -58.69)
CIE-LCH	lch(30.80, 64.83, 295.14°)
OKLab	oklab(41.38% -0.0139 -0.1698)
OKLCH	oklch(41.38% 0.17 265.3)
XYZ	xyz(9.1647, 6.5683, 36.8538)
Luminance	0.0657 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3FA6 #A6841D

analogous

#1D83A6 #1D3FA6 #3F1DA6

triadic

#1D3FA6 #A61D3F #3FA61D

tetradic

#1D3FA6 #A61D83 #A6841D #1DA63F

square

#1D3FA6 #A61D83 #A6841D #1DA63F

split-complementary

#1D3FA6 #A63F1D #83A61D

monochromatic

#0B173E #142B72 #1D3FA6 #2753D9 #5B7DE2

Accessibility & contrast

On white

9.08

#1D3FA6 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.31

#1D3FA6 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3FA6

9.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3FA6	#FFFFFF	#000000	##FFFFFF
##1D3FA6	1.00	9.08	2.31	9.08
#FFFFFF	9.08	1.00	21.00	1.00
#000000	2.31	21.00	1.00	21.00
##FFFFFF	9.08	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FA9

Deuteranopia (green-blind)

#0042A4

Tritanopia (blue-blind)

#005A6C

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #1d3fa6;
/* rgb */ color: rgb(29, 63, 166);
/* oklch */ color: oklch(41.4% 0.170 265.3);

Tailwind

colors: {
  custom: {
    50: '#7273c1',
    500: '#1d3fa6',
    950: '#000000',
  },
}

SCSS

$custom: #1d3fa6;
$custom-light: #7273c1;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3fa6",
  "rgb": {
    "r": 29,
    "g": 63,
    "b": 166
  },
  "hsl": {
    "h": 225.109,
    "s": 70.256,
    "l": 38.235
  },
  "oklch": {
    "l": 0.41384,
    "c": 0.17038,
    "h": 265.3
  },
  "luminance": 0.06569
}

Semantic roles & 50–950 ramp

primary

#1D3FA6

secondary

#C6AB59

accent

#C13BED

background

#F7F6FC

surface

#EEECF8

border

#C9C7D1

text

#090812

muted

#7B7B81

Preview Lab

Preview with #1D3FA6

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

Preview Lab → · Contrast checker → · Palette generator →