#1D40A7#1D40A7

#1D40A7 is a dark, vivid blue. Relative luminance 0.067; OKLCH L 41.7% C 0.171 H 265.1°. Best body text is #FFFFFF at 8.96:1 contrast (WCAG AA passes).

Color values

HEX	#1D40A7
RGB	rgb(29, 64, 167)
HSL	hsl(225, 70%, 38%)
HSV	hsv(225, 83%, 65%)
CMYK	cmyk(82.6%, 61.7%, 0%, 34.5%)
CIE-LAB	lab(31.15, 27.26, -58.71)
CIE-LCH	lch(31.15, 64.73, 294.90°)
OKLab	oklab(41.67% -0.0145 -0.1699)
OKLCH	oklch(41.67% 0.171 265.1)
XYZ	xyz(9.3127, 6.7169, 37.3574)
Luminance	0.0672 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D40A7 #A7841D

analogous

#1D85A7 #1D40A7 #3F1DA7

triadic

#1D40A7 #A71D40 #40A71D

tetradic

#1D40A7 #A71D85 #A7841D #1DA73F

square

#1D40A7 #A71D85 #A7841D #1DA73F

split-complementary

#1D40A7 #A73F1D #85A71D

monochromatic

#0B183F #142C73 #1D40A7 #2855DA #5C7EE3

Accessibility & contrast

On white

8.96

#1D40A7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.34

#1D40A7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D40A7

8.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D40A7	#FFFFFF	#000000	##FFFFFF
##1D40A7	1.00	8.96	2.34	8.96
#FFFFFF	8.96	1.00	21.00	1.00
#000000	2.34	21.00	1.00	21.00
##FFFFFF	8.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050AA

Deuteranopia (green-blind)

#0043A5

Tritanopia (blue-blind)

#005B6D

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #1d40a7;
/* rgb */ color: rgb(29, 64, 167);
/* oklch */ color: oklch(41.7% 0.171 265.1);

Tailwind

colors: {
  custom: {
    50: '#7274c2',
    500: '#1d40a7',
    950: '#000000',
  },
}

SCSS

$custom: #1d40a7;
$custom-light: #7274c2;
$custom-dark: #000000;

JSON

{
  "hex": "#1d40a7",
  "rgb": {
    "r": 29,
    "g": 64,
    "b": 167
  },
  "hsl": {
    "h": 224.783,
    "s": 70.408,
    "l": 38.431
  },
  "oklch": {
    "l": 0.41671,
    "c": 0.1705,
    "h": 265.1
  },
  "luminance": 0.06718
}

Semantic roles & 50–950 ramp

primary

#1D40A7

secondary

#C7AB59

accent

#C03BED

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#090812

muted

#7B7B81

Preview Lab

Preview with #1D40A7

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

Preview Lab → · Contrast checker → · Palette generator →