#1D388A#1D388A

#1D388A is a dark, vivid blue. Relative luminance 0.049; OKLCH L 37.4% C 0.141 H 265.9°. Best body text is #FFFFFF at 10.58:1 contrast (WCAG AA passes).

Color values

HEX	#1D388A
RGB	rgb(29, 56, 138)
HSL	hsl(225, 65%, 33%)
HSV	hsv(225, 79%, 54%)
CMYK	cmyk(79%, 59.4%, 0%, 45.9%)
CIE-LAB	lab(26.52, 21.28, -48.59)
CIE-LCH	lch(26.52, 53.04, 293.65°)
OKLab	oklab(37.44% -0.0101 -0.1403)
OKLCH	oklch(37.44% 0.141 265.9)
XYZ	xyz(6.5067, 4.9238, 24.6473)
Luminance	0.0493 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D388A #8A6F1D

analogous

#1D6E8A #1D388A #391D8A

triadic

#1D388A #8A1D38 #388A1D

tetradic

#1D388A #8A1D6E #8A6F1D #1D8A39

square

#1D388A #8A1D6E #8A6F1D #1D8A39

split-complementary

#1D388A #8A391D #6E8A1D

monochromatic

#080F25 #122357 #1D388A #284DBD #496CD9

Accessibility & contrast

On white

10.58

#1D388A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.99

#1D388A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D388A

10.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D388A	#FFFFFF	#000000	##FFFFFF
##1D388A	1.00	10.58	1.99	10.58
#FFFFFF	10.58	1.00	21.00	1.00
#000000	1.99	21.00	1.00	21.00
##FFFFFF	10.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00448D

Deuteranopia (green-blind)

#003A88

Tritanopia (blue-blind)

#004D5B

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #1d388a;
/* rgb */ color: rgb(29, 56, 138);
/* oklch */ color: oklch(37.4% 0.141 265.9);

Tailwind

colors: {
  custom: {
    50: '#6b6ead',
    500: '#1d388a',
    950: '#000000',
  },
}

SCSS

$custom: #1d388a;
$custom-light: #6b6ead;
$custom-dark: #000000;

JSON

{
  "hex": "#1d388a",
  "rgb": {
    "r": 29,
    "g": 56,
    "b": 138
  },
  "hsl": {
    "h": 225.138,
    "s": 65.269,
    "l": 32.745
  },
  "oklch": {
    "l": 0.37441,
    "c": 0.14064,
    "h": 265.9
  },
  "luminance": 0.04925
}

Semantic roles & 50–950 ramp

primary

#1D388A

secondary

#BB9E48

accent

#BE40E8

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#080710

muted

#7A7A7F

Preview Lab

Preview with #1D388A

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

Preview Lab → · Contrast checker → · Palette generator →