#1D3A9B#1D3A9B

#1D3A9B is a dark, vivid blue. Relative luminance 0.057; OKLCH L 39.4% C 0.162 H 266.1°. Best body text is #FFFFFF at 9.86:1 contrast (WCAG AA passes).

Color values

HEX	#1D3A9B
RGB	rgb(29, 58, 155)
HSL	hsl(226, 68%, 36%)
HSV	hsv(226, 81%, 61%)
CMYK	cmyk(81.3%, 62.6%, 0%, 39.2%)
CIE-LAB	lab(28.52, 26.63, -55.77)
CIE-LCH	lch(28.52, 61.80, 295.52°)
OKLab	oklab(39.39% -0.0111 -0.1613)
OKLCH	oklch(39.39% 0.162 266.1)
XYZ	xyz(7.9341, 5.6529, 31.6770)
Luminance	0.0565 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3A9B #9B7E1D

analogous

#1D799B #1D3A9B #3F1D9B

triadic

#1D3A9B #9B1D3A #3A9B1D

tetradic

#1D3A9B #9B1D79 #9B7E1D #1D9B3F

square

#1D3A9B #9B1D79 #9B7E1D #1D9B3F

split-complementary

#1D3A9B #9B3F1D #799B1D

monochromatic

#0A1334 #132767 #1D3A9B #274DCF #5374DF

Accessibility & contrast

On white

9.86

#1D3A9B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.13

#1D3A9B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3A9B

9.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3A9B	#FFFFFF	#000000	##FFFFFF
##1D3A9B	1.00	9.86	2.13	9.86
#FFFFFF	9.86	1.00	21.00	1.00
#000000	2.13	21.00	1.00	21.00
##FFFFFF	9.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00499E

Deuteranopia (green-blind)

#003E99

Tritanopia (blue-blind)

#005365

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #1d3a9b;
/* rgb */ color: rgb(29, 58, 155);
/* oklch */ color: oklch(39.4% 0.162 266.1);

Tailwind

colors: {
  custom: {
    50: '#706fb9',
    500: '#1d3a9b',
    950: '#000000',
  },
}

SCSS

$custom: #1d3a9b;
$custom-light: #706fb9;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3a9b",
  "rgb": {
    "r": 29,
    "g": 58,
    "b": 155
  },
  "hsl": {
    "h": 226.19,
    "s": 68.478,
    "l": 36.078
  },
  "oklch": {
    "l": 0.39389,
    "c": 0.1617,
    "h": 266.1
  },
  "luminance": 0.05654
}

Semantic roles & 50–950 ramp

primary

#1D3A9B

secondary

#C2A852

accent

#C33CEB

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #1D3A9B

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

Preview Lab → · Contrast checker → · Palette generator →