#1D378E#1D378E

#1D378E is a dark, vivid blue. Relative luminance 0.049; OKLCH L 37.6% C 0.148 H 266.4°. Best body text is #FFFFFF at 10.56:1 contrast (WCAG AA passes).

Color values

HEX	#1D378E
RGB	rgb(29, 55, 142)
HSL	hsl(226, 66%, 34%)
HSV	hsv(226, 80%, 56%)
CMYK	cmyk(79.6%, 61.3%, 0%, 44.3%)
CIE-LAB	lab(26.58, 23.56, -50.96)
CIE-LCH	lch(26.58, 56.14, 294.81°)
OKLab	oklab(37.59% -0.0093 -0.1473)
OKLCH	oklch(37.59% 0.148 266.4)
XYZ	xyz(6.7537, 4.9458, 26.1846)
Luminance	0.0495 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D378E #8E741D

analogous

#1D6F8E #1D378E #3B1D8E

triadic

#1D378E #8E1D37 #378E1D

tetradic

#1D378E #8E1D6F #8E741D #1D8E3B

square

#1D378E #8E1D6F #8E741D #1D8E3B

split-complementary

#1D378E #8E3B1D #6F8E1D

monochromatic

#081028 #13235B #1D378E #274BC1 #4B6CDA

Accessibility & contrast

On white

10.56

#1D378E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.99

#1D378E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D378E

10.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D378E	#FFFFFF	#000000	##FFFFFF
##1D378E	1.00	10.56	1.99	10.56
#FFFFFF	10.56	1.00	21.00	1.00
#000000	1.99	21.00	1.00	21.00
##FFFFFF	10.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004491

Deuteranopia (green-blind)

#003A8C

Tritanopia (blue-blind)

#004D5D

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #1d378e;
/* rgb */ color: rgb(29, 55, 142);
/* oklch */ color: oklch(37.6% 0.148 266.4);

Tailwind

colors: {
  custom: {
    50: '#6c6db0',
    500: '#1d378e',
    950: '#000000',
  },
}

SCSS

$custom: #1d378e;
$custom-light: #6c6db0;
$custom-dark: #000000;

JSON

{
  "hex": "#1d378e",
  "rgb": {
    "r": 29,
    "g": 55,
    "b": 142
  },
  "hsl": {
    "h": 226.195,
    "s": 66.082,
    "l": 33.529
  },
  "oklch": {
    "l": 0.37594,
    "c": 0.14756,
    "h": 266.4
  },
  "luminance": 0.04947
}

Semantic roles & 50–950 ramp

primary

#1D378E

secondary

#BDA24A

accent

#C23FE9

background

#F7F6FA

surface

#EDEBF5

border

#C8C6CF

text

#080711

muted

#7B7A80

Preview Lab

Preview with #1D378E

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

Preview Lab → · Contrast checker → · Palette generator →