#1D378D#1D378D

#1D378D is a dark, vivid blue. Relative luminance 0.049; OKLCH L 37.5% C 0.146 H 266.3°. Best body text is #FFFFFF at 10.59:1 contrast (WCAG AA passes).

Color values

HEX	#1D378D
RGB	rgb(29, 55, 141)
HSL	hsl(226, 66%, 33%)
HSV	hsv(226, 79%, 55%)
CMYK	cmyk(79.4%, 61%, 0%, 44.7%)
CIE-LAB	lab(26.49, 23.17, -50.48)
CIE-LCH	lch(26.49, 55.54, 294.65°)
OKLab	oklab(37.5% -0.0093 -0.1459)
OKLCH	oklch(37.5% 0.146 266.3)
XYZ	xyz(6.6789, 4.9159, 25.7910)
Luminance	0.0492 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D378D #8D731D

analogous

#1D6F8D #1D378D #3B1D8D

triadic

#1D378D #8D1D37 #378D1D

tetradic

#1D378D #8D1D6F #8D731D #1D8D3B

square

#1D378D #8D1D6F #8D731D #1D8D3B

split-complementary

#1D378D #8D3B1D #6F8D1D

monochromatic

#080F27 #13235A #1D378D #274BC0 #4B6CDA

Accessibility & contrast

On white

10.59

#1D378D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.98

#1D378D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D378D

10.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D378D	#FFFFFF	#000000	##FFFFFF
##1D378D	1.00	10.59	1.98	10.59
#FFFFFF	10.59	1.00	21.00	1.00
#000000	1.98	21.00	1.00	21.00
##FFFFFF	10.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004490

Deuteranopia (green-blind)

#003A8B

Tritanopia (blue-blind)

#004D5C

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #1d378d;
/* rgb */ color: rgb(29, 55, 141);
/* oklch */ color: oklch(37.5% 0.146 266.3);

Tailwind

colors: {
  custom: {
    50: '#6c6daf',
    500: '#1d378d',
    950: '#000000',
  },
}

SCSS

$custom: #1d378d;
$custom-light: #6c6daf;
$custom-dark: #000000;

JSON

{
  "hex": "#1d378d",
  "rgb": {
    "r": 29,
    "g": 55,
    "b": 141
  },
  "hsl": {
    "h": 226.071,
    "s": 65.882,
    "l": 33.333
  },
  "oklch": {
    "l": 0.37504,
    "c": 0.14616,
    "h": 266.3
  },
  "luminance": 0.04917
}

Semantic roles & 50–950 ramp

primary

#1D378D

secondary

#BCA24A

accent

#C13FE9

background

#F7F6FA

surface

#EDEBF5

border

#C8C6CF

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #1D378D

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

Preview Lab → · Contrast checker → · Palette generator →