#1D4599#1D4599

#1D4599 is a dark, vivid blue. Relative luminance 0.068; OKLCH L 41.5% C 0.145 H 262.7°. Best body text is #FFFFFF at 8.89:1 contrast (WCAG AA passes).

Color values

HEX	#1D4599
RGB	rgb(29, 69, 153)
HSL	hsl(221, 68%, 36%)
HSV	hsv(221, 81%, 60%)
CMYK	cmyk(81%, 54.9%, 0%, 40%)
CIE-LAB	lab(31.39, 18.31, -49.88)
CIE-LCH	lch(31.39, 53.14, 290.16°)
OKLab	oklab(41.49% -0.0185 -0.1439)
OKLCH	oklch(41.49% 0.145 262.7)
XYZ	xyz(8.3825, 6.8164, 31.0047)
Luminance	0.0682 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D4599 #99711D

analogous

#1D8399 #1D4599 #331D99

triadic

#1D4599 #991D45 #45991D

tetradic

#1D4599 #991D83 #99711D #1D9933

square

#1D4599 #991D83 #99711D #1D9933

split-complementary

#1D4599 #99331D #83991D

monochromatic

#091732 #132E66 #1D4599 #275CCC #527FDE

Accessibility & contrast

On white

8.89

#1D4599 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.36

#1D4599 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D4599

8.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D4599	#FFFFFF	#000000	##FFFFFF
##1D4599	1.00	8.89	2.36	8.89
#FFFFFF	8.89	1.00	21.00	1.00
#000000	2.36	21.00	1.00	21.00
##FFFFFF	8.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00509C

Deuteranopia (green-blind)

#004497

Tritanopia (blue-blind)

#005A68

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #1d4599;
/* rgb */ color: rgb(29, 69, 153);
/* oklch */ color: oklch(41.5% 0.145 262.7);

Tailwind

colors: {
  custom: {
    50: '#6e78b8',
    500: '#1d4599',
    950: '#000000',
  },
}

SCSS

$custom: #1d4599;
$custom-light: #6e78b8;
$custom-dark: #000000;

JSON

{
  "hex": "#1d4599",
  "rgb": {
    "r": 29,
    "g": 69,
    "b": 153
  },
  "hsl": {
    "h": 220.645,
    "s": 68.132,
    "l": 35.686
  },
  "oklch": {
    "l": 0.41489,
    "c": 0.14505,
    "h": 262.7
  },
  "luminance": 0.06817
}

Semantic roles & 50–950 ramp

primary

#1D4599

secondary

#C19D51

accent

#B33DEB

background

#F7F7FB

surface

#EDEDF6

border

#C8C8D0

text

#080811

muted

#7B7B80

Preview Lab

Preview with #1D4599

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

Preview Lab → · Contrast checker → · Palette generator →