#1D4E9B#1D4E9B

#1D4E9B is a dark, vivid blue. Relative luminance 0.081; OKLCH L 43.6% C 0.136 H 259.4°. Best body text is #FFFFFF at 8.03:1 contrast (WCAG AA passes).

Color values

HEX	#1D4E9B
RGB	rgb(29, 78, 155)
HSL	hsl(217, 68%, 36%)
HSV	hsv(217, 81%, 61%)
CMYK	cmyk(81.3%, 49.7%, 0%, 39.2%)
CIE-LAB	lab(34.14, 13.00, -46.64)
CIE-LCH	lch(34.14, 48.41, 285.57°)
OKLab	oklab(43.64% -0.0251 -0.1341)
OKLCH	oklch(43.64% 0.136 259.4)
XYZ	xyz(9.1453, 8.0755, 32.0807)
Luminance	0.0808 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D4E9B #9B6A1D

analogous

#1D8D9B #1D4E9B #2B1D9B

triadic

#1D4E9B #9B1D4E #4E9B1D

tetradic

#1D4E9B #9B1D8D #9B6A1D #1D9B2B

square

#1D4E9B #9B1D8D #9B6A1D #1D9B2B

split-complementary

#1D4E9B #9B2B1D #8D9B1D

monochromatic

#0A1A34 #133467 #1D4E9B #2768CF #538ADF

Accessibility & contrast

On white

8.03

#1D4E9B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.62

#1D4E9B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D4E9B

8.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D4E9B	#FFFFFF	#000000	##FFFFFF
##1D4E9B	1.00	8.03	2.62	8.03
#FFFFFF	8.03	1.00	21.00	1.00
#000000	2.62	21.00	1.00	21.00
##FFFFFF	8.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#21569E

Deuteranopia (green-blind)

#004B99

Tritanopia (blue-blind)

#00616D

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #1d4e9b;
/* rgb */ color: rgb(29, 78, 155);
/* oklch */ color: oklch(43.6% 0.136 259.4);

Tailwind

colors: {
  custom: {
    50: '#6e7eb9',
    500: '#1d4e9b',
    950: '#000000',
  },
}

SCSS

$custom: #1d4e9b;
$custom-light: #6e7eb9;
$custom-dark: #000000;

JSON

{
  "hex": "#1d4e9b",
  "rgb": {
    "r": 29,
    "g": 78,
    "b": 155
  },
  "hsl": {
    "h": 216.667,
    "s": 68.478,
    "l": 36.078
  },
  "oklch": {
    "l": 0.43637,
    "c": 0.13646,
    "h": 259.4
  },
  "luminance": 0.08077
}

Semantic roles & 50–950 ramp

primary

#1D4E9B

secondary

#C29652

accent

#A73CEB

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#080A11

muted

#7B7C80

Preview Lab

Preview with #1D4E9B

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

Preview Lab → · Contrast checker → · Palette generator →