#1B348B#1B348B
#1B348B is a dark, vivid blue. Relative luminance 0.046; OKLCH L 36.6% C 0.148 H 266.5°. Best body text is #FFFFFF at 10.99:1 contrast (WCAG AA passes).
Color values
| HEX | #1B348B |
|---|---|
| RGB | rgb(27, 52, 139) |
| HSL | hsl(227, 67%, 33%) |
| HSV | hsv(227, 81%, 55%) |
| CMYK | cmyk(80.6%, 62.6%, 0%, 45.5%) |
| CIE-LAB | lab(25.42, 24.23, -51.00) |
| CIE-LCH | lch(25.42, 56.46, 295.41°) |
| OKLab | oklab(36.63% -0.009 -0.1475) |
| OKLCH | oklch(36.63% 0.148 266.5) |
| XYZ | xyz(6.3386, 4.5523, 24.9657) |
| Luminance | 0.0455 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Sapphire (survey)
#2138AB
ΔE00 4.82
Blueberry
#464196
ΔE00 6.52
Darkish Blue
#014182
ΔE00 6.66
Darkslateblue
#483D8B
ΔE00 6.89
Cobalt (survey)
#1E488F
ΔE00 6.92
Marine Blue
#01386A
ΔE00 7.17
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#1B348B #8B721B
analogous
#1B6C8B #1B348B #3A1B8B
triadic
#1B348B #8B1B34 #348B1B
tetradic
#1B348B #8B1B6C #8B721B #1B8B3A
square
#1B348B #8B1B6C #8B721B #1B8B3A
split-complementary
#1B348B #8B3A1B #6C8B1B
monochromatic
#070E25 #112158 #1B348B #2547BE #4567DB
Accessibility & contrast
On white
10.99
#1B348B on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
1.91
#1B348B on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #1B348B
10.99:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##1B348B | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##1B348B | 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)
#00428E
Deuteranopia (green-blind)
#003789
Tritanopia (blue-blind)
#004A5A
Achromatopsia (no color)
#3C3C3C
Design tokens & code
CSS
--color: #1b348b; /* rgb */ color: rgb(27, 52, 139); /* oklch */ color: oklch(36.6% 0.148 266.5);
Tailwind
colors: {
custom: {
50: '#6b6bae',
500: '#1b348b',
950: '#000000',
},
}SCSS
$custom: #1b348b; $custom-light: #6b6bae; $custom-dark: #000000;
JSON
{
"hex": "#1b348b",
"rgb": {
"r": 27,
"g": 52,
"b": 139
},
"hsl": {
"h": 226.607,
"s": 67.47,
"l": 32.549
},
"oklch": {
"l": 0.36626,
"c": 0.14774,
"h": 266.5
},
"luminance": 0.04553
}Semantic roles & 50–950 ramp
primary
#1B348B
secondary
#BCA245
accent
#C43DEA
background
#F7F6FA
surface
#EDEBF4
border
#C8C6CE
text
#080610
muted
#7B7A7F