#1D4C9B#1D4C9B

#1D4C9B is a dark, vivid blue. Relative luminance 0.078; OKLCH L 43.2% C 0.139 H 260.2°. Best body text is #FFFFFF at 8.21:1 contrast (WCAG AA passes).

Color values

HEX	#1D4C9B
RGB	rgb(29, 76, 155)
HSL	hsl(218, 68%, 36%)
HSV	hsv(218, 81%, 61%)
CMYK	cmyk(81.3%, 51%, 0%, 39.2%)
CIE-LAB	lab(33.55, 14.35, -47.58)
CIE-LCH	lch(33.55, 49.70, 286.78°)
OKLab	oklab(43.19% -0.0236 -0.1369)
OKLCH	oklch(43.19% 0.139 260.2)
XYZ	xyz(9.0054, 7.7956, 32.0341)
Luminance	0.0780 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D4C9B #9B6C1D

analogous

#1D8B9B #1D4C9B #2D1D9B

triadic

#1D4C9B #9B1D4C #4C9B1D

tetradic

#1D4C9B #9B1D8B #9B6C1D #1D9B2D

square

#1D4C9B #9B1D8B #9B6C1D #1D9B2D

split-complementary

#1D4C9B #9B2D1D #8B9B1D

monochromatic

#0A1934 #133367 #1D4C9B #2765CF #5387DF

Accessibility & contrast

On white

8.21

#1D4C9B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.56

#1D4C9B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D4C9B

8.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D4C9B	#FFFFFF	#000000	##FFFFFF
##1D4C9B	1.00	8.21	2.56	8.21
#FFFFFF	8.21	1.00	21.00	1.00
#000000	2.56	21.00	1.00	21.00
##FFFFFF	8.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B559E

Deuteranopia (green-blind)

#004A99

Tritanopia (blue-blind)

#005F6C

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #1d4c9b;
/* rgb */ color: rgb(29, 76, 155);
/* oklch */ color: oklch(43.2% 0.139 260.2);

Tailwind

colors: {
  custom: {
    50: '#6e7db9',
    500: '#1d4c9b',
    950: '#000000',
  },
}

SCSS

$custom: #1d4c9b;
$custom-light: #6e7db9;
$custom-dark: #000000;

JSON

{
  "hex": "#1d4c9b",
  "rgb": {
    "r": 29,
    "g": 76,
    "b": 155
  },
  "hsl": {
    "h": 217.619,
    "s": 68.478,
    "l": 36.078
  },
  "oklch": {
    "l": 0.43187,
    "c": 0.13896,
    "h": 260.2
  },
  "luminance": 0.07797
}

Semantic roles & 50–950 ramp

primary

#1D4C9B

secondary

#C29852

accent

#AA3CEB

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#080911

muted

#7B7B80

Preview Lab

Preview with #1D4C9B

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

Preview Lab → · Contrast checker → · Palette generator →