#1D3F80#1D3F80

#1D3F80 is a dark, moderate blue. Relative luminance 0.054; OKLCH L 38.1% C 0.117 H 261.8°. Best body text is #FFFFFF at 10.12:1 contrast (WCAG AA passes).

Color values

HEX	#1D3F80
RGB	rgb(29, 63, 128)
HSL	hsl(219, 63%, 31%)
HSV	hsv(219, 77%, 50%)
CMYK	cmyk(77.3%, 50.8%, 0%, 49.8%)
CIE-LAB	lab(27.77, 12.36, -40.32)
CIE-LCH	lch(27.77, 42.17, 287.05°)
OKLab	oklab(38.15% -0.0167 -0.1158)
OKLCH	oklch(38.15% 0.117 261.8)
XYZ	xyz(6.1791, 5.3740, 21.1295)
Luminance	0.0537 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3F80 #805E1D

analogous

#1D7080 #1D3F80 #2C1D80

triadic

#1D3F80 #801D3F #3F801D

tetradic

#1D3F80 #801D70 #805E1D #1D802C

square

#1D3F80 #801D70 #805E1D #1D802C

split-complementary

#1D3F80 #802C1D #70801D

monochromatic

#060E1C #12264E #1D3F80 #2858B2 #4375D4

Accessibility & contrast

On white

10.12

#1D3F80 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.08

#1D3F80 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3F80

10.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3F80	#FFFFFF	#000000	##FFFFFF
##1D3F80	1.00	10.12	2.08	10.12
#FFFFFF	10.12	1.00	21.00	1.00
#000000	2.08	21.00	1.00	21.00
##FFFFFF	10.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#194682

Deuteranopia (green-blind)

#003D7F

Tritanopia (blue-blind)

#004E59

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #1d3f80;
/* rgb */ color: rgb(29, 63, 128);
/* oklch */ color: oklch(38.1% 0.117 261.8);

Tailwind

colors: {
  custom: {
    50: '#6873a5',
    500: '#1d3f80',
    950: '#000000',
  },
}

SCSS

$custom: #1d3f80;
$custom-light: #6873a5;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3f80",
  "rgb": {
    "r": 29,
    "g": 63,
    "b": 128
  },
  "hsl": {
    "h": 219.394,
    "s": 63.057,
    "l": 30.784
  },
  "oklch": {
    "l": 0.3815,
    "c": 0.11704,
    "h": 261.8
  },
  "luminance": 0.05375
}

Semantic roles & 50–950 ramp

primary

#1D3F80

secondary

#B38E45

accent

#AE42E6

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #1D3F80

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

Preview Lab → · Contrast checker → · Palette generator →