#1D4B9B#1D4B9B

#1D4B9B is a dark, vivid blue. Relative luminance 0.077; OKLCH L 43.0% C 0.140 H 260.6°. Best body text is #FFFFFF at 8.29:1 contrast (WCAG AA passes).

Color values

HEX	#1D4B9B
RGB	rgb(29, 75, 155)
HSL	hsl(218, 68%, 36%)
HSV	hsv(218, 81%, 61%)
CMYK	cmyk(81.3%, 51.6%, 0%, 39.2%)
CIE-LAB	lab(33.26, 15.03, -48.05)
CIE-LCH	lch(33.26, 50.35, 287.37°)
OKLab	oklab(42.97% -0.0228 -0.1384)
OKLCH	oklch(42.97% 0.14 260.6)
XYZ	xyz(8.9370, 7.6589, 32.0113)
Luminance	0.0766 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D4B9B #9B6D1D

analogous

#1D8A9B #1D4B9B #2E1D9B

triadic

#1D4B9B #9B1D4B #4B9B1D

tetradic

#1D4B9B #9B1D8A #9B6D1D #1D9B2E

square

#1D4B9B #9B1D8A #9B6D1D #1D9B2E

split-complementary

#1D4B9B #9B2E1D #8A9B1D

monochromatic

#0A1934 #133267 #1D4B9B #2764CF #5386DF

Accessibility & contrast

On white

8.29

#1D4B9B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.53

#1D4B9B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D4B9B

8.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D4B9B	#FFFFFF	#000000	##FFFFFF
##1D4B9B	1.00	8.29	2.53	8.29
#FFFFFF	8.29	1.00	21.00	1.00
#000000	2.53	21.00	1.00	21.00
##FFFFFF	8.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#17549E

Deuteranopia (green-blind)

#004999

Tritanopia (blue-blind)

#005E6B

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #1d4b9b;
/* rgb */ color: rgb(29, 75, 155);
/* oklch */ color: oklch(43.0% 0.140 260.6);

Tailwind

colors: {
  custom: {
    50: '#6e7cb9',
    500: '#1d4b9b',
    950: '#000000',
  },
}

SCSS

$custom: #1d4b9b;
$custom-light: #6e7cb9;
$custom-dark: #000000;

JSON

{
  "hex": "#1d4b9b",
  "rgb": {
    "r": 29,
    "g": 75,
    "b": 155
  },
  "hsl": {
    "h": 218.095,
    "s": 68.478,
    "l": 36.078
  },
  "oklch": {
    "l": 0.42965,
    "c": 0.14022,
    "h": 260.6
  },
  "luminance": 0.0766
}

Semantic roles & 50–950 ramp

primary

#1D4B9B

secondary

#C29952

accent

#AB3CEB

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#080911

muted

#7B7B80

Preview Lab

Preview with #1D4B9B

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

Preview Lab → · Contrast checker → · Palette generator →