#1D4181#1D4181

#1D4181 is a dark, moderate blue. Relative luminance 0.056; OKLCH L 38.7% C 0.116 H 260.9°. Best body text is #FFFFFF at 9.88:1 contrast (WCAG AA passes).

Color values

HEX	#1D4181
RGB	rgb(29, 65, 129)
HSL	hsl(218, 63%, 31%)
HSV	hsv(218, 78%, 51%)
CMYK	cmyk(77.5%, 49.6%, 0%, 49.4%)
CIE-LAB	lab(28.45, 11.38, -39.86)
CIE-LCH	lch(28.45, 41.45, 285.94°)
OKLab	oklab(38.69% -0.0184 -0.1144)
OKLCH	oklch(38.69% 0.116 260.9)
XYZ	xyz(6.3580, 5.6261, 21.5155)
Luminance	0.0563 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D4181 #815D1D

analogous

#1D7381 #1D4181 #2B1D81

triadic

#1D4181 #811D41 #41811D

tetradic

#1D4181 #811D73 #815D1D #1D812B

square

#1D4181 #811D73 #815D1D #1D812B

split-complementary

#1D4181 #812B1D #73811D

monochromatic

#070F1D #12284F #1D4181 #285AB3 #4478D5

Accessibility & contrast

On white

9.88

#1D4181 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.13

#1D4181 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D4181

9.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D4181	#FFFFFF	#000000	##FFFFFF
##1D4181	1.00	9.88	2.13	9.88
#FFFFFF	9.88	1.00	21.00	1.00
#000000	2.13	21.00	1.00	21.00
##FFFFFF	9.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1D4883

Deuteranopia (green-blind)

#003F80

Tritanopia (blue-blind)

#00505A

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #1d4181;
/* rgb */ color: rgb(29, 65, 129);
/* oklch */ color: oklch(38.7% 0.116 260.9);

Tailwind

colors: {
  custom: {
    50: '#6875a6',
    500: '#1d4181',
    950: '#000000',
  },
}

SCSS

$custom: #1d4181;
$custom-light: #6875a6;
$custom-dark: #000000;

JSON

{
  "hex": "#1d4181",
  "rgb": {
    "r": 29,
    "g": 65,
    "b": 129
  },
  "hsl": {
    "h": 218.4,
    "s": 63.291,
    "l": 30.98
  },
  "oklch": {
    "l": 0.38689,
    "c": 0.1159,
    "h": 260.9
  },
  "luminance": 0.05627
}

Semantic roles & 50–950 ramp

primary

#1D4181

secondary

#B48C46

accent

#AB41E6

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #1D4181

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

Preview Lab → · Contrast checker → · Palette generator →