#1D3D80#1D3D80

#1D3D80 is a dark, moderate blue. Relative luminance 0.052; OKLCH L 37.7% C 0.120 H 262.8°. Best body text is #FFFFFF at 10.34:1 contrast (WCAG AA passes).

Color values

HEX	#1D3D80
RGB	rgb(29, 61, 128)
HSL	hsl(221, 63%, 31%)
HSV	hsv(221, 77%, 50%)
CMYK	cmyk(77.3%, 52.3%, 0%, 49.8%)
CIE-LAB	lab(27.18, 13.76, -41.28)
CIE-LCH	lch(27.18, 43.51, 288.43°)
OKLab	oklab(37.69% -0.015 -0.1187)
OKLCH	oklch(37.69% 0.12 262.8)
XYZ	xyz(6.0703, 5.1565, 21.0933)
Luminance	0.0516 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3D80 #80601D

analogous

#1D6E80 #1D3D80 #2E1D80

triadic

#1D3D80 #801D3D #3D801D

tetradic

#1D3D80 #801D6E #80601D #1D802E

square

#1D3D80 #801D6E #80601D #1D802E

split-complementary

#1D3D80 #802E1D #6E801D

monochromatic

#060D1C #12254E #1D3D80 #2855B2 #4372D4

Accessibility & contrast

On white

10.34

#1D3D80 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.03

#1D3D80 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3D80

10.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3D80	#FFFFFF	#000000	##FFFFFF
##1D3D80	1.00	10.34	2.03	10.34
#FFFFFF	10.34	1.00	21.00	1.00
#000000	2.03	21.00	1.00	21.00
##FFFFFF	10.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#144582

Deuteranopia (green-blind)

#003C7F

Tritanopia (blue-blind)

#004D58

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #1d3d80;
/* rgb */ color: rgb(29, 61, 128);
/* oklch */ color: oklch(37.7% 0.120 262.8);

Tailwind

colors: {
  custom: {
    50: '#6872a5',
    500: '#1d3d80',
    950: '#000000',
  },
}

SCSS

$custom: #1d3d80;
$custom-light: #6872a5;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3d80",
  "rgb": {
    "r": 29,
    "g": 61,
    "b": 128
  },
  "hsl": {
    "h": 220.606,
    "s": 63.057,
    "l": 30.784
  },
  "oklch": {
    "l": 0.37693,
    "c": 0.11966,
    "h": 262.8
  },
  "luminance": 0.05157
}

Semantic roles & 50–950 ramp

primary

#1D3D80

secondary

#B39045

accent

#B142E6

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #1D3D80

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

Preview Lab → · Contrast checker → · Palette generator →