#1D4D9B#1D4D9B

#1D4D9B is a dark, vivid blue. Relative luminance 0.079; OKLCH L 43.4% C 0.138 H 259.8°. Best body text is #FFFFFF at 8.12:1 contrast (WCAG AA passes).

Color values

HEX	#1D4D9B
RGB	rgb(29, 77, 155)
HSL	hsl(217, 68%, 36%)
HSV	hsv(217, 81%, 61%)
CMYK	cmyk(81.3%, 50.3%, 0%, 39.2%)
CIE-LAB	lab(33.85, 13.67, -47.11)
CIE-LCH	lch(33.85, 49.05, 286.19°)
OKLab	oklab(43.41% -0.0243 -0.1355)
OKLCH	oklch(43.41% 0.138 259.8)
XYZ	xyz(9.0748, 7.9344, 32.0572)
Luminance	0.0794 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D4D9B #9B6B1D

analogous

#1D8C9B #1D4D9B #2C1D9B

triadic

#1D4D9B #9B1D4D #4D9B1D

tetradic

#1D4D9B #9B1D8C #9B6B1D #1D9B2C

square

#1D4D9B #9B1D8C #9B6B1D #1D9B2C

split-complementary

#1D4D9B #9B2C1D #8C9B1D

monochromatic

#0A1A34 #133367 #1D4D9B #2767CF #5389DF

Accessibility & contrast

On white

8.12

#1D4D9B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.59

#1D4D9B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D4D9B

8.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D4D9B	#FFFFFF	#000000	##FFFFFF
##1D4D9B	1.00	8.12	2.59	8.12
#FFFFFF	8.12	1.00	21.00	1.00
#000000	2.59	21.00	1.00	21.00
##FFFFFF	8.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1E569E

Deuteranopia (green-blind)

#004A99

Tritanopia (blue-blind)

#00606C

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #1d4d9b;
/* rgb */ color: rgb(29, 77, 155);
/* oklch */ color: oklch(43.4% 0.138 259.8);

Tailwind

colors: {
  custom: {
    50: '#6e7eb9',
    500: '#1d4d9b',
    950: '#000000',
  },
}

SCSS

$custom: #1d4d9b;
$custom-light: #6e7eb9;
$custom-dark: #000000;

JSON

{
  "hex": "#1d4d9b",
  "rgb": {
    "r": 29,
    "g": 77,
    "b": 155
  },
  "hsl": {
    "h": 217.143,
    "s": 68.478,
    "l": 36.078
  },
  "oklch": {
    "l": 0.43411,
    "c": 0.13771,
    "h": 259.8
  },
  "luminance": 0.07936
}

Semantic roles & 50–950 ramp

primary

#1D4D9B

secondary

#C29752

accent

#A93CEB

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#080911

muted

#7B7B80

Preview Lab

Preview with #1D4D9B

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

Preview Lab → · Contrast checker → · Palette generator →