#1D3AA8#1D3AA8

#1D3AA8 is a dark, vivid blue. Relative luminance 0.061; OKLCH L 40.6% C 0.179 H 266.4°. Best body text is #FFFFFF at 9.45:1 contrast (WCAG AA passes).

Color values

HEX	#1D3AA8
RGB	rgb(29, 58, 168)
HSL	hsl(227, 71%, 39%)
HSV	hsv(227, 83%, 66%)
CMYK	cmyk(82.7%, 65.5%, 0%, 34.1%)
CIE-LAB	lab(29.70, 31.64, -61.70)
CIE-LCH	lch(29.70, 69.34, 297.15°)
OKLab	oklab(40.62% -0.0113 -0.1787)
OKLCH	oklch(40.62% 0.179 266.4)
XYZ	xyz(9.0852, 6.1134, 37.7394)
Luminance	0.0611 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3AA8 #A88B1D

analogous

#1D7FA8 #1D3AA8 #451DA8

triadic

#1D3AA8 #A81D3A #3AA81D

tetradic

#1D3AA8 #A81D7F #A88B1D #1DA845

square

#1D3AA8 #A81D7F #A88B1D #1DA845

split-complementary

#1D3AA8 #A8451D #7FA81D

monochromatic

#0B1640 #142874 #1D3AA8 #284DDA #5C79E3

Accessibility & contrast

On white

9.45

#1D3AA8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.22

#1D3AA8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3AA8

9.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3AA8	#FFFFFF	#000000	##FFFFFF
##1D3AA8	1.00	9.45	2.22	9.45
#FFFFFF	9.45	1.00	21.00	1.00
#000000	2.22	21.00	1.00	21.00
##FFFFFF	9.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DAB

Deuteranopia (green-blind)

#003FA6

Tritanopia (blue-blind)

#00576B

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #1d3aa8;
/* rgb */ color: rgb(29, 58, 168);
/* oklch */ color: oklch(40.6% 0.179 266.4);

Tailwind

colors: {
  custom: {
    50: '#7370c3',
    500: '#1d3aa8',
    950: '#000000',
  },
}

SCSS

$custom: #1d3aa8;
$custom-light: #7370c3;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3aa8",
  "rgb": {
    "r": 29,
    "g": 58,
    "b": 168
  },
  "hsl": {
    "h": 227.482,
    "s": 70.558,
    "l": 38.627
  },
  "oklch": {
    "l": 0.40621,
    "c": 0.17905,
    "h": 266.4
  },
  "luminance": 0.06114
}

Semantic roles & 50–950 ramp

primary

#1D3AA8

secondary

#C7B05A

accent

#C83AED

background

#F7F6FC

surface

#EEECF8

border

#C9C7D1

text

#0A0713

muted

#7C7A82

Preview Lab

Preview with #1D3AA8

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

Preview Lab → · Contrast checker → · Palette generator →