#1D3CB0#1D3CB0

#1D3CB0 is a dark, vivid blue. Relative luminance 0.066; OKLCH L 41.8% C 0.187 H 266.2°. Best body text is #FFFFFF at 9.03:1 contrast (WCAG AA passes).

Color values

HEX	#1D3CB0
RGB	rgb(29, 60, 176)
HSL	hsl(227, 72%, 40%)
HSV	hsv(227, 84%, 69%)
CMYK	cmyk(83.5%, 65.9%, 0%, 31%)
CIE-LAB	lab(30.94, 33.37, -64.45)
CIE-LCH	lch(30.94, 72.57, 297.37°)
OKLab	oklab(41.76% -0.0125 -0.1867)
OKLCH	oklch(41.76% 0.187 266.2)
XYZ	xyz(9.9563, 6.6263, 41.8201)
Luminance	0.0663 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3CB0 #B0911D

analogous

#1D85B0 #1D3CB0 #481DB0

triadic

#1D3CB0 #B01D3C #3CB01D

tetradic

#1D3CB0 #B01D85 #B0911D #1DB048

square

#1D3CB0 #B01D85 #B0911D #1DB048

split-complementary

#1D3CB0 #B0481D #85B01D

monochromatic

#0C1847 #142A7B #1D3CB0 #2E53DD #627EE5

Accessibility & contrast

On white

9.03

#1D3CB0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.33

#1D3CB0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3CB0

9.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3CB0	#FFFFFF	#000000	##FFFFFF
##1D3CB0	1.00	9.03	2.33	9.03
#FFFFFF	9.03	1.00	21.00	1.00
#000000	2.33	21.00	1.00	21.00
##FFFFFF	9.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050B4

Deuteranopia (green-blind)

#0042AE

Tritanopia (blue-blind)

#005B70

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #1d3cb0;
/* rgb */ color: rgb(29, 60, 176);
/* oklch */ color: oklch(41.8% 0.187 266.2);

Tailwind

colors: {
  custom: {
    50: '#7571c9',
    500: '#1d3cb0',
    950: '#000000',
  },
}

SCSS

$custom: #1d3cb0;
$custom-light: #7571c9;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3cb0",
  "rgb": {
    "r": 29,
    "g": 60,
    "b": 176
  },
  "hsl": {
    "h": 227.347,
    "s": 71.707,
    "l": 40.196
  },
  "oklch": {
    "l": 0.41762,
    "c": 0.18712,
    "h": 266.2
  },
  "luminance": 0.06628
}

Semantic roles & 50–950 ramp

primary

#1D3CB0

secondary

#CAB35F

accent

#C839EE

background

#F7F6FC

surface

#EEECF8

border

#C9C7D1

text

#0A0713

muted

#7C7A82

Preview Lab

Preview with #1D3CB0

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

Preview Lab → · Contrast checker → · Palette generator →