#1D3780#1D3780
#1D3780 is a dark, vivid blue. Relative luminance 0.046; OKLCH L 36.4% C 0.128 H 265.5°. Best body text is #FFFFFF at 10.99:1 contrast (WCAG AA passes).
Color values
| HEX | #1D3780 |
|---|---|
| RGB | rgb(29, 55, 128) |
| HSL | hsl(224, 63%, 31%) |
| HSV | hsv(224, 77%, 50%) |
| CMYK | cmyk(77.3%, 57%, 0%, 49.8%) |
| CIE-LAB | lab(25.42, 17.96, -44.13) |
| CIE-LCH | lch(25.42, 47.65, 292.15°) |
| OKLab | oklab(36.36% -0.0099 -0.1272) |
| OKLCH | oklch(36.36% 0.128 265.5) |
| XYZ | xyz(5.7678, 4.5515, 20.9924) |
| Luminance | 0.0455 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Darkish Blue
#014182
ΔE00 5.20
Marine Blue
#01386A
ΔE00 5.39
Marine
#042E60
ΔE00 5.68
Cobalt (survey)
#1E488F
ΔE00 5.88
Twilight Blue
#0A437A
ΔE00 6.19
Sapphire (survey)
#2138AB
ΔE00 6.67
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#1D3780 #80661D
analogous
#1D6880 #1D3780 #341D80
triadic
#1D3780 #801D37 #37801D
tetradic
#1D3780 #801D68 #80661D #1D8034
square
#1D3780 #801D68 #80661D #1D8034
split-complementary
#1D3780 #80341D #68801D
monochromatic
#060C1C #12224E #1D3780 #284CB2 #4369D4
Accessibility & contrast
On white
10.99
#1D3780 on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
1.91
#1D3780 on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #1D3780
10.99:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##1D3780 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##1D3780 | 1.00 | 10.99 | 1.91 | 10.99 |
| #FFFFFF | 10.99 | 1.00 | 21.00 | 1.00 |
| #000000 | 1.91 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 10.99 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#004183
Deuteranopia (green-blind)
#00387F
Tritanopia (blue-blind)
#004956
Achromatopsia (no color)
#3C3C3C
Design tokens & code
CSS
--color: #1d3780; /* rgb */ color: rgb(29, 55, 128); /* oklch */ color: oklch(36.4% 0.128 265.5);
Tailwind
colors: {
custom: {
50: '#696da5',
500: '#1d3780',
950: '#000000',
},
}SCSS
$custom: #1d3780; $custom-light: #696da5; $custom-dark: #000000;
JSON
{
"hex": "#1d3780",
"rgb": {
"r": 29,
"g": 55,
"b": 128
},
"hsl": {
"h": 224.242,
"s": 63.057,
"l": 30.784
},
"oklch": {
"l": 0.36358,
"c": 0.1276,
"h": 265.5
},
"luminance": 0.04552
}Semantic roles & 50–950 ramp
primary
#1D3780
secondary
#B39645
accent
#BB42E6
background
#F6F6FA
surface
#ECEBF4
border
#C7C6CE
text
#07070F
muted
#7A7A7F