#1D4381#1D4381

#1D4381 is a dark, moderate blue. Relative luminance 0.059; OKLCH L 39.2% C 0.113 H 259.8°. Best body text is #FFFFFF at 9.67:1 contrast (WCAG AA passes).

Color values

HEX	#1D4381
RGB	rgb(29, 67, 129)
HSL	hsl(217, 63%, 31%)
HSV	hsv(217, 78%, 51%)
CMYK	cmyk(77.5%, 48.1%, 0%, 49.4%)
CIE-LAB	lab(29.06, 10.00, -38.88)
CIE-LCH	lch(29.06, 40.14, 284.42°)
OKLab	oklab(39.16% -0.0201 -0.1115)
OKLCH	oklch(39.16% 0.113 259.8)
XYZ	xyz(6.4749, 5.8598, 21.5544)
Luminance	0.0586 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D4381 #815B1D

analogous

#1D7581 #1D4381 #291D81

triadic

#1D4381 #811D43 #43811D

tetradic

#1D4381 #811D75 #815B1D #1D8129

square

#1D4381 #811D75 #815B1D #1D8129

split-complementary

#1D4381 #81291D #75811D

monochromatic

#070F1D #12294F #1D4381 #285DB3 #447BD5

Accessibility & contrast

On white

9.67

#1D4381 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.17

#1D4381 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D4381

9.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D4381	#FFFFFF	#000000	##FFFFFF
##1D4381	1.00	9.67	2.17	9.67
#FFFFFF	9.67	1.00	21.00	1.00
#000000	2.17	21.00	1.00	21.00
##FFFFFF	9.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#224983

Deuteranopia (green-blind)

#094080

Tritanopia (blue-blind)

#00525B

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #1d4381;
/* rgb */ color: rgb(29, 67, 129);
/* oklch */ color: oklch(39.2% 0.113 259.8);

Tailwind

colors: {
  custom: {
    50: '#6876a6',
    500: '#1d4381',
    950: '#000000',
  },
}

SCSS

$custom: #1d4381;
$custom-light: #6876a6;
$custom-dark: #000000;

JSON

{
  "hex": "#1d4381",
  "rgb": {
    "r": 29,
    "g": 67,
    "b": 129
  },
  "hsl": {
    "h": 217.2,
    "s": 63.291,
    "l": 30.98
  },
  "oklch": {
    "l": 0.39156,
    "c": 0.11334,
    "h": 259.8
  },
  "luminance": 0.0586
}

Semantic roles & 50–950 ramp

primary

#1D4381

secondary

#B48A46

accent

#A841E6

background

#F6F7FA

surface

#EBEDF4

border

#C6C8CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #1D4381

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

Preview Lab → · Contrast checker → · Palette generator →