#1B307A#1B307A
#1B307A is a dark, vivid blue. Relative luminance 0.038; OKLCH L 34.2% C 0.129 H 267.1°. Best body text is #FFFFFF at 12.00:1 contrast (WCAG AA passes).
Color values
| HEX | #1B307A |
|---|---|
| RGB | rgb(27, 48, 122) |
| HSL | hsl(227, 64%, 29%) |
| HSV | hsv(227, 78%, 48%) |
| CMYK | cmyk(77.9%, 60.7%, 0%, 52.2%) |
| CIE-LAB | lab(22.83, 20.22, -44.55) |
| CIE-LCH | lch(22.83, 48.93, 294.42°) |
| OKLab | oklab(34.24% -0.0065 -0.1286) |
| OKLCH | oklch(34.24% 0.129 267.1) |
| XYZ | xyz(5.0206, 3.7515, 18.8681) |
| Luminance | 0.0375 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Marine
#042E60
ΔE00 5.30
Marine Blue
#01386A
ΔE00 6.38
Midnight Blue
#191970
ΔE00 7.08
Darkish Blue
#014182
ΔE00 7.20
Sapphire (survey)
#2138AB
ΔE00 7.46
Darkslateblue
#483D8B
ΔE00 7.62
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#1B307A #7A651B
analogous
#1B607A #1B307A #361B7A
triadic
#1B307A #7A1B30 #307A1B
tetradic
#1B307A #7A1B60 #7A651B #1B7A36
square
#1B307A #7A1B60 #7A651B #1B7A36
split-complementary
#1B307A #7A361B #607A1B
monochromatic
#060A19 #101C48 #1B307A #2644AC #3C5DD4
Accessibility & contrast
On white
12.00
#1B307A on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
1.75
#1B307A on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #1B307A
12.00:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##1B307A | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##1B307A | 1.00 | 12.00 | 1.75 | 12.00 |
| #FFFFFF | 12.00 | 1.00 | 21.00 | 1.00 |
| #000000 | 1.75 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 12.00 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#003B7C
Deuteranopia (green-blind)
#003279
Tritanopia (blue-blind)
#004350
Achromatopsia (no color)
#363636
Design tokens & code
CSS
--color: #1b307a; /* rgb */ color: rgb(27, 48, 122); /* oklch */ color: oklch(34.2% 0.129 267.1);
Tailwind
colors: {
custom: {
50: '#6767a1',
500: '#1b307a',
950: '#000000',
},
}SCSS
$custom: #1b307a; $custom-light: #6767a1; $custom-dark: #000000;
JSON
{
"hex": "#1b307a",
"rgb": {
"r": 27,
"g": 48,
"b": 122
},
"hsl": {
"h": 226.737,
"s": 63.758,
"l": 29.216
},
"oklch": {
"l": 0.34237,
"c": 0.12876,
"h": 267.1
},
"luminance": 0.03752
}Semantic roles & 50–950 ramp
primary
#1B307A
secondary
#AE9643
accent
#C241E7
background
#F6F6FA
surface
#EBEBF3
border
#C6C6CD
text
#07060F
muted
#7A7A7F