#1D378C#1D378C

#1D378C is a dark, vivid blue. Relative luminance 0.049; OKLCH L 37.4% C 0.145 H 266.3°. Best body text is #FFFFFF at 10.62:1 contrast (WCAG AA passes).

Color values

HEX	#1D378C
RGB	rgb(29, 55, 140)
HSL	hsl(226, 66%, 33%)
HSV	hsv(226, 79%, 55%)
CMYK	cmyk(79.3%, 60.7%, 0%, 45.1%)
CIE-LAB	lab(26.41, 22.77, -50.00)
CIE-LCH	lch(26.41, 54.94, 294.48°)
OKLab	oklab(37.41% -0.0093 -0.1445)
OKLCH	oklch(37.41% 0.145 266.3)
XYZ	xyz(6.6048, 4.8863, 25.4009)
Luminance	0.0489 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D378C #8C721D

analogous

#1D6E8C #1D378C #3A1D8C

triadic

#1D378C #8C1D37 #378C1D

tetradic

#1D378C #8C1D6E #8C721D #1D8C3A

square

#1D378C #8C1D6E #8C721D #1D8C3A

split-complementary

#1D378C #8C3A1D #6E8C1D

monochromatic

#080F27 #122359 #1D378C #284BBF #4A6CD9

Accessibility & contrast

On white

10.62

#1D378C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.98

#1D378C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D378C

10.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D378C	#FFFFFF	#000000	##FFFFFF
##1D378C	1.00	10.62	1.98	10.62
#FFFFFF	10.62	1.00	21.00	1.00
#000000	1.98	21.00	1.00	21.00
##FFFFFF	10.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00448F

Deuteranopia (green-blind)

#00398A

Tritanopia (blue-blind)

#004D5C

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #1d378c;
/* rgb */ color: rgb(29, 55, 140);
/* oklch */ color: oklch(37.4% 0.145 266.3);

Tailwind

colors: {
  custom: {
    50: '#6c6dae',
    500: '#1d378c',
    950: '#000000',
  },
}

SCSS

$custom: #1d378c;
$custom-light: #6c6dae;
$custom-dark: #000000;

JSON

{
  "hex": "#1d378c",
  "rgb": {
    "r": 29,
    "g": 55,
    "b": 140
  },
  "hsl": {
    "h": 225.946,
    "s": 65.68,
    "l": 33.137
  },
  "oklch": {
    "l": 0.37413,
    "c": 0.14476,
    "h": 266.3
  },
  "luminance": 0.04887
}

Semantic roles & 50–950 ramp

primary

#1D378C

secondary

#BCA149

accent

#C13FE9

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #1D378C

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

Preview Lab → · Contrast checker → · Palette generator →