#1D40B3#1D40B3

#1D40B3 is a dark, vivid blue. Relative luminance 0.072; OKLCH L 42.8% C 0.186 H 265.5°. Best body text is #FFFFFF at 8.62:1 contrast (WCAG AA passes).

Color values

HEX	#1D40B3
RGB	rgb(29, 64, 179)
HSL	hsl(226, 72%, 41%)
HSV	hsv(226, 84%, 70%)
CMYK	cmyk(83.8%, 64.2%, 0%, 29.8%)
CIE-LAB	lab(32.22, 31.88, -64.14)
CIE-LCH	lch(32.22, 71.63, 296.43°)
OKLab	oklab(42.79% -0.0145 -0.1858)
OKLCH	oklch(42.79% 0.186 265.5)
XYZ	xyz(10.4739, 7.1814, 43.4732)
Luminance	0.0718 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D40B3 #B3901D

analogous

#1D8BB3 #1D40B3 #451DB3

triadic

#1D40B3 #B31D40 #40B31D

tetradic

#1D40B3 #B31D8B #B3901D #1DB345

square

#1D40B3 #B31D8B #B3901D #1DB345

split-complementary

#1D40B3 #B3451D #8BB31D

monochromatic

#0C1A4A #142D7E #1D40B3 #3058DD #6483E6

Accessibility & contrast

On white

8.62

#1D40B3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.44

#1D40B3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D40B3

8.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D40B3	#FFFFFF	#000000	##FFFFFF
##1D40B3	1.00	8.62	2.44	8.62
#FFFFFF	8.62	1.00	21.00	1.00
#000000	2.44	21.00	1.00	21.00
##FFFFFF	8.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053B7

Deuteranopia (green-blind)

#0045B1

Tritanopia (blue-blind)

#005F73

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #1d40b3;
/* rgb */ color: rgb(29, 64, 179);
/* oklch */ color: oklch(42.8% 0.186 265.5);

Tailwind

colors: {
  custom: {
    50: '#7574cb',
    500: '#1d40b3',
    950: '#000000',
  },
}

SCSS

$custom: #1d40b3;
$custom-light: #7574cb;
$custom-dark: #000000;

JSON

{
  "hex": "#1d40b3",
  "rgb": {
    "r": 29,
    "g": 64,
    "b": 179
  },
  "hsl": {
    "h": 226,
    "s": 72.115,
    "l": 40.784
  },
  "oklch": {
    "l": 0.42786,
    "c": 0.18633,
    "h": 265.5
  },
  "luminance": 0.07183
}

Semantic roles & 50–950 ramp

primary

#1D40B3

secondary

#CBB261

accent

#C439EF

background

#F7F7FC

surface

#EEEDF9

border

#C9C8D2

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #1D40B3

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

Preview Lab → · Contrast checker → · Palette generator →