#1D3EB0#1D3EB0

#1D3EB0 is a dark, vivid blue. Relative luminance 0.068; OKLCH L 42.1% C 0.185 H 265.8°. Best body text is #FFFFFF at 8.87:1 contrast (WCAG AA passes).

Color values

HEX	#1D3EB0
RGB	rgb(29, 62, 176)
HSL	hsl(227, 72%, 40%)
HSV	hsv(227, 84%, 69%)
CMYK	cmyk(83.5%, 64.8%, 0%, 31%)
CIE-LAB	lab(31.44, 32.06, -63.63)
CIE-LCH	lch(31.44, 71.25, 296.74°)
OKLab	oklab(42.13% -0.0135 -0.1843)
OKLCH	oklch(42.13% 0.185 265.8)
XYZ	xyz(10.0630, 6.8398, 41.8557)
Luminance	0.0684 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3EB0 #B08F1D

analogous

#1D87B0 #1D3EB0 #461DB0

triadic

#1D3EB0 #B01D3E #3EB01D

tetradic

#1D3EB0 #B01D87 #B08F1D #1DB046

square

#1D3EB0 #B01D87 #B08F1D #1DB046

split-complementary

#1D3EB0 #B0461D #87B01D

monochromatic

#0C1947 #142B7B #1D3EB0 #2E55DD #6280E5

Accessibility & contrast

On white

8.87

#1D3EB0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.37

#1D3EB0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3EB0

8.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3EB0	#FFFFFF	#000000	##FFFFFF
##1D3EB0	1.00	8.87	2.37	8.87
#FFFFFF	8.87	1.00	21.00	1.00
#000000	2.37	21.00	1.00	21.00
##FFFFFF	8.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051B4

Deuteranopia (green-blind)

#0043AE

Tritanopia (blue-blind)

#005C71

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #1d3eb0;
/* rgb */ color: rgb(29, 62, 176);
/* oklch */ color: oklch(42.1% 0.185 265.8);

Tailwind

colors: {
  custom: {
    50: '#7573c9',
    500: '#1d3eb0',
    950: '#000000',
  },
}

SCSS

$custom: #1d3eb0;
$custom-light: #7573c9;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3eb0",
  "rgb": {
    "r": 29,
    "g": 62,
    "b": 176
  },
  "hsl": {
    "h": 226.531,
    "s": 71.707,
    "l": 40.196
  },
  "oklch": {
    "l": 0.4213,
    "c": 0.18478,
    "h": 265.8
  },
  "luminance": 0.06841
}

Semantic roles & 50–950 ramp

primary

#1D3EB0

secondary

#CAB25F

accent

#C639EE

background

#F7F6FC

surface

#EEECF8

border

#C9C7D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #1D3EB0

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

Preview Lab → · Contrast checker → · Palette generator →