#1B3A85#1B3A85
#1B3A85 is a dark, vivid blue. Relative luminance 0.050; OKLCH L 37.4% C 0.131 H 264.1°. Best body text is #FFFFFF at 10.55:1 contrast (WCAG AA passes).
Color values
| HEX | #1B3A85 |
|---|---|
| RGB | rgb(27, 58, 133) |
| HSL | hsl(222, 66%, 31%) |
| HSV | hsv(222, 80%, 52%) |
| CMYK | cmyk(79.7%, 56.4%, 0%, 47.8%) |
| CIE-LAB | lab(26.60, 17.63, -45.35) |
| CIE-LCH | lch(26.60, 48.66, 291.25°) |
| OKLab | oklab(37.35% -0.0136 -0.1308) |
| OKLCH | oklch(37.35% 0.131 264.1) |
| XYZ | xyz(6.1972, 4.9519, 22.8149) |
| Luminance | 0.0495 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Darkish Blue
#014182
ΔE00 4.29
Cobalt (survey)
#1E488F
ΔE00 4.75
Marine Blue
#01386A
ΔE00 5.28
Twilight Blue
#0A437A
ΔE00 5.38
Sapphire (survey)
#2138AB
ΔE00 6.25
Cobalt
#0047AB
ΔE00 6.28
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#1B3A85 #85661B
analogous
#1B6F85 #1B3A85 #311B85
triadic
#1B3A85 #851B3A #3A851B
tetradic
#1B3A85 #851B6F #85661B #1B8531
square
#1B3A85 #851B6F #85661B #1B8531
split-complementary
#1B3A85 #85311B #6F851B
monochromatic
#060E1F #112452 #1B3A85 #2550B8 #426ED9
Accessibility & contrast
On white
10.55
#1B3A85 on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
1.99
#1B3A85 on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #1B3A85
10.55:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##1B3A85 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##1B3A85 | 1.00 | 10.55 | 1.99 | 10.55 |
| #FFFFFF | 10.55 | 1.00 | 21.00 | 1.00 |
| #000000 | 1.99 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 10.55 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#004488
Deuteranopia (green-blind)
#003A84
Tritanopia (blue-blind)
#004C59
Achromatopsia (no color)
#3F3F3F
Design tokens & code
CSS
--color: #1b3a85; /* rgb */ color: rgb(27, 58, 133); /* oklch */ color: oklch(37.4% 0.131 264.1);
Tailwind
colors: {
custom: {
50: '#696fa9',
500: '#1b3a85',
950: '#000000',
},
}SCSS
$custom: #1b3a85; $custom-light: #696fa9; $custom-dark: #000000;
JSON
{
"hex": "#1b3a85",
"rgb": {
"r": 27,
"g": 58,
"b": 133
},
"hsl": {
"h": 222.453,
"s": 66.25,
"l": 31.373
},
"oklch": {
"l": 0.37352,
"c": 0.13147,
"h": 264.1
},
"luminance": 0.04953
}Semantic roles & 50–950 ramp
primary
#1B3A85
secondary
#B89644
accent
#B73FE9
background
#F6F6FA
surface
#ECECF4
border
#C7C7CE
text
#070710
muted
#7A7A7F