#1F3A8D#1F3A8D
#1F3A8D is a dark, vivid blue. Relative luminance 0.052; OKLCH L 38.2% C 0.142 H 266.1°. Best body text is #FFFFFF at 10.25:1 contrast (WCAG AA passes).
Color values
| HEX | #1F3A8D |
|---|---|
| RGB | rgb(31, 58, 141) |
| HSL | hsl(225, 64%, 34%) |
| HSV | hsv(225, 78%, 55%) |
| CMYK | cmyk(78%, 58.9%, 0%, 44.7%) |
| CIE-LAB | lab(27.41, 21.32, -48.99) |
| CIE-LCH | lch(27.41, 53.43, 293.52°) |
| OKLab | oklab(38.21% -0.0097 -0.1414) |
| OKLCH | oklch(38.21% 0.142 266.1) |
| XYZ | xyz(6.8842, 5.2397, 25.8427) |
| Luminance | 0.0524 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Sapphire (survey)
#2138AB
ΔE00 4.83
Cobalt (survey)
#1E488F
ΔE00 5.08
Darkish Blue
#014182
ΔE00 5.29
Cobalt
#0047AB
ΔE00 5.76
Blueberry
#464196
ΔE00 5.96
Twilight Blue
#0A437A
ΔE00 6.42
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#1F3A8D #8D721F
analogous
#1F718D #1F3A8D #3B1F8D
triadic
#1F3A8D #8D1F3A #3A8D1F
tetradic
#1F3A8D #8D1F71 #8D721F #1F8D3B
square
#1F3A8D #8D1F71 #8D721F #1F8D3B
split-complementary
#1F3A8D #8D3B1F #718D1F
monochromatic
#091129 #14255B #1F3A8D #2A4FBF #4E70D8
Accessibility & contrast
On white
10.25
#1F3A8D on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.05
#1F3A8D on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #1F3A8D
10.25:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##1F3A8D | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##1F3A8D | 1.00 | 10.25 | 2.05 | 10.25 |
| #FFFFFF | 10.25 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.05 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 10.25 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#004690
Deuteranopia (green-blind)
#003C8B
Tritanopia (blue-blind)
#004F5D
Achromatopsia (no color)
#414141
Design tokens & code
CSS
--color: #1f3a8d; /* rgb */ color: rgb(31, 58, 141); /* oklch */ color: oklch(38.2% 0.142 266.1);
Tailwind
colors: {
custom: {
50: '#6d6faf',
500: '#1f3a8d',
950: '#000000',
},
}SCSS
$custom: #1f3a8d; $custom-light: #6d6faf; $custom-dark: #000000;
JSON
{
"hex": "#1f3a8d",
"rgb": {
"r": 31,
"g": 58,
"b": 141
},
"hsl": {
"h": 225.273,
"s": 63.953,
"l": 33.725
},
"oklch": {
"l": 0.3821,
"c": 0.14174,
"h": 266.1
},
"luminance": 0.05241
}Semantic roles & 50–950 ramp
primary
#1F3A8D
secondary
#BBA04D
accent
#BE41E7
background
#F7F6FA
surface
#EDECF5
border
#C8C7CF
text
#080710
muted
#7B7A7F