#1D4183#1D4183

#1D4183 is a dark, moderate blue. Relative luminance 0.057; OKLCH L 38.8% C 0.119 H 261.3°. Best body text is #FFFFFF at 9.83:1 contrast (WCAG AA passes).

Color values

HEX	#1D4183
RGB	rgb(29, 65, 131)
HSL	hsl(219, 64%, 31%)
HSV	hsv(219, 78%, 51%)
CMYK	cmyk(77.9%, 50.4%, 0%, 48.6%)
CIE-LAB	lab(28.59, 12.19, -40.87)
CIE-LCH	lch(28.59, 42.65, 286.61°)
OKLab	oklab(38.84% -0.018 -0.1174)
OKLCH	oklch(38.84% 0.119 261.3)
XYZ	xyz(6.4922, 5.6798, 22.2225)
Luminance	0.0568 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D4183 #835F1D

analogous

#1D7483 #1D4183 #2C1D83

triadic

#1D4183 #831D41 #41831D

tetradic

#1D4183 #831D74 #835F1D #1D832C

square

#1D4183 #831D74 #835F1D #1D832C

split-complementary

#1D4183 #832C1D #74831D

monochromatic

#070F1F #122851 #1D4183 #285AB5 #4578D6

Accessibility & contrast

On white

9.83

#1D4183 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.14

#1D4183 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D4183

9.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D4183	#FFFFFF	#000000	##FFFFFF
##1D4183	1.00	9.83	2.14	9.83
#FFFFFF	9.83	1.00	21.00	1.00
#000000	2.14	21.00	1.00	21.00
##FFFFFF	9.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B4885

Deuteranopia (green-blind)

#003F82

Tritanopia (blue-blind)

#00515B

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #1d4183;
/* rgb */ color: rgb(29, 65, 131);
/* oklch */ color: oklch(38.8% 0.119 261.3);

Tailwind

colors: {
  custom: {
    50: '#6975a7',
    500: '#1d4183',
    950: '#000000',
  },
}

SCSS

$custom: #1d4183;
$custom-light: #6975a7;
$custom-dark: #000000;

JSON

{
  "hex": "#1d4183",
  "rgb": {
    "r": 29,
    "g": 65,
    "b": 131
  },
  "hsl": {
    "h": 218.824,
    "s": 63.75,
    "l": 31.373
  },
  "oklch": {
    "l": 0.38842,
    "c": 0.11882,
    "h": 261.3
  },
  "luminance": 0.0568
}

Semantic roles & 50–950 ramp

primary

#1D4183

secondary

#B68E46

accent

#AC41E7

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #1D4183

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

Preview Lab → · Contrast checker → · Palette generator →