#1D3DB0#1D3DB0

#1D3DB0 is a dark, vivid blue. Relative luminance 0.067; OKLCH L 41.9% C 0.186 H 266.0°. Best body text is #FFFFFF at 8.95:1 contrast (WCAG AA passes).

Color values

HEX	#1D3DB0
RGB	rgb(29, 61, 176)
HSL	hsl(227, 72%, 40%)
HSV	hsv(227, 84%, 69%)
CMYK	cmyk(83.5%, 65.3%, 0%, 31%)
CIE-LAB	lab(31.19, 32.71, -64.04)
CIE-LCH	lch(31.19, 71.91, 297.06°)
OKLab	oklab(41.95% -0.013 -0.1855)
OKLCH	oklch(41.95% 0.186 266)
XYZ	xyz(10.0092, 6.7321, 41.8378)
Luminance	0.0673 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3DB0 #B0901D

analogous

#1D86B0 #1D3DB0 #471DB0

triadic

#1D3DB0 #B01D3D #3DB01D

tetradic

#1D3DB0 #B01D86 #B0901D #1DB047

square

#1D3DB0 #B01D86 #B0901D #1DB047

split-complementary

#1D3DB0 #B0471D #86B01D

monochromatic

#0C1947 #142B7B #1D3DB0 #2E54DD #627FE5

Accessibility & contrast

On white

8.95

#1D3DB0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.35

#1D3DB0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3DB0

8.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3DB0	#FFFFFF	#000000	##FFFFFF
##1D3DB0	1.00	8.95	2.35	8.95
#FFFFFF	8.95	1.00	21.00	1.00
#000000	2.35	21.00	1.00	21.00
##FFFFFF	8.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050B4

Deuteranopia (green-blind)

#0043AE

Tritanopia (blue-blind)

#005C71

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #1d3db0;
/* rgb */ color: rgb(29, 61, 176);
/* oklch */ color: oklch(41.9% 0.186 266.0);

Tailwind

colors: {
  custom: {
    50: '#7572c9',
    500: '#1d3db0',
    950: '#000000',
  },
}

SCSS

$custom: #1d3db0;
$custom-light: #7572c9;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3db0",
  "rgb": {
    "r": 29,
    "g": 61,
    "b": 176
  },
  "hsl": {
    "h": 226.939,
    "s": 71.707,
    "l": 40.196
  },
  "oklch": {
    "l": 0.41945,
    "c": 0.18595,
    "h": 266
  },
  "luminance": 0.06733
}

Semantic roles & 50–950 ramp

primary

#1D3DB0

secondary

#CAB35F

accent

#C739EE

background

#F7F6FC

surface

#EEECF8

border

#C9C7D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #1D3DB0

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

Preview Lab → · Contrast checker → · Palette generator →