#1D3A71#1D3A71
#1D3A71 is a dark, moderate blue. Relative luminance 0.045; OKLCH L 35.8% C 0.101 H 261.8°. Best body text is #FFFFFF at 11.08:1 contrast (WCAG AA passes).
Color values
| HEX | #1D3A71 |
|---|---|
| RGB | rgb(29, 58, 113) |
| HSL | hsl(219, 59%, 28%) |
| HSV | hsv(219, 74%, 44%) |
| CMYK | cmyk(74.3%, 48.7%, 0%, 55.7%) |
| CIE-LAB | lab(25.20, 9.77, -35.00) |
| CIE-LCH | lch(25.20, 36.33, 285.60°) |
| OKLab | oklab(35.84% -0.0145 -0.1003) |
| OKLCH | oklch(35.84% 0.101 261.8) |
| XYZ | xyz(4.9993, 4.4791, 16.2207) |
| Luminance | 0.0448 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Marine Blue
#01386A
ΔE00 3.24
Darkish Blue
#014182
ΔE00 4.14
Marine
#042E60
ΔE00 4.22
Twilight Blue
#0A437A
ΔE00 4.52
Cobalt (survey)
#1E488F
ΔE00 5.70
Prussian Blue
#004577
ΔE00 6.03
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#1D3A71 #71541D
analogous
#1D6471 #1D3A71 #2A1D71
triadic
#1D3A71 #711D3A #3A711D
tetradic
#1D3A71 #711D64 #71541D #1D712A
square
#1D3A71 #711D64 #71541D #1D712A
split-complementary
#1D3A71 #712A1D #64711D
monochromatic
#060C18 #112140 #1D3A71 #2953A2 #3C6ECD
Accessibility & contrast
On white
11.08
#1D3A71 on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
1.90
#1D3A71 on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #1D3A71
11.08:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##1D3A71 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##1D3A71 | 1.00 | 11.08 | 1.90 | 11.08 |
| #FFFFFF | 11.08 | 1.00 | 21.00 | 1.00 |
| #000000 | 1.90 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 11.08 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#1D4073
Deuteranopia (green-blind)
#0B3870
Tritanopia (blue-blind)
#004750
Achromatopsia (no color)
#3C3C3C
Design tokens & code
CSS
--color: #1d3a71; /* rgb */ color: rgb(29, 58, 113); /* oklch */ color: oklch(35.8% 0.101 261.8);
Tailwind
colors: {
custom: {
50: '#656f9a',
500: '#1d3a71',
950: '#000000',
},
}SCSS
$custom: #1d3a71; $custom-light: #656f9a; $custom-dark: #000000;
JSON
{
"hex": "#1d3a71",
"rgb": {
"r": 29,
"g": 58,
"b": 113
},
"hsl": {
"h": 219.286,
"s": 59.155,
"l": 27.843
},
"oklch": {
"l": 0.35835,
"c": 0.10131,
"h": 261.8
},
"luminance": 0.0448
}Semantic roles & 50–950 ramp
primary
#1D3A71
secondary
#A58444
accent
#AC45E2
background
#F6F6F9
surface
#EBECF2
border
#C6C7CC
text
#06070E
muted
#7A7A7E