#1B166C#1B166C
#1B166C is a dark, vivid blue. Relative luminance 0.019; OKLCH L 28.0% C 0.141 H 274.9°. Best body text is #FFFFFF at 15.24:1 contrast (WCAG AA passes).
Color values
| HEX | #1B166C |
|---|---|
| RGB | rgb(27, 22, 108) |
| HSL | hsl(243, 66%, 25%) |
| HSV | hsv(243, 80%, 42%) |
| CMYK | cmyk(75%, 79.6%, 0%, 57.6%) |
| CIE-LAB | lab(14.89, 32.30, -48.55) |
| CIE-LCH | lch(14.89, 58.32, 303.63°) |
| OKLab | oklab(28.03% 0.012 -0.1404) |
| OKLCH | oklch(28.03% 0.141 274.9) |
| XYZ | xyz(3.4448, 1.8892, 14.3676) |
| Luminance | 0.0189 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Midnight Blue
#191970
ΔE00 1.00
Darkblue (survey)
#030764
ΔE00 3.57
Dark Royal Blue
#02066F
ΔE00 3.66
Deep Blue
#040273
ΔE00 4.39
Dark Blue
#00035B
ΔE00 4.90
Dark Indigo
#1F0954
ΔE00 4.93
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#1B166C #676C16
analogous
#163C6C #1B166C #46166C
triadic
#1B166C #6C1B16 #166C1B
tetradic
#1B166C #6C163C #676C16 #166C46
square
#1B166C #6C163C #676C16 #166C46
split-complementary
#1B166C #6C4616 #3C6C16
monochromatic
#060519 #0E0C39 #1B166C #28209F #342BD2
Accessibility & contrast
On white
15.24
#1B166C on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
1.38
#1B166C on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #1B166C
15.24:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##1B166C | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##1B166C | 1.00 | 15.24 | 1.38 | 15.24 |
| #FFFFFF | 15.24 | 1.00 | 21.00 | 1.00 |
| #000000 | 1.38 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 15.24 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#00296E
Deuteranopia (green-blind)
#00216A
Tritanopia (blue-blind)
#002F40
Achromatopsia (no color)
#252525
Design tokens & code
CSS
--color: #1b166c; /* rgb */ color: rgb(27, 22, 108); /* oklch */ color: oklch(28.0% 0.141 274.9);
Tailwind
colors: {
custom: {
50: '#665597',
500: '#1b166c',
950: '#000000',
},
}SCSS
$custom: #1b166c; $custom-light: #665597; $custom-dark: #000000;
JSON
{
"hex": "#1b166c",
"rgb": {
"r": 27,
"g": 22,
"b": 108
},
"hsl": {
"h": 243.488,
"s": 66.154,
"l": 25.49
},
"oklch": {
"l": 0.28031,
"c": 0.14092,
"h": 274.9
},
"luminance": 0.0189
}Semantic roles & 50–950 ramp
primary
#1B166C
secondary
#9CA23C
accent
#E93FDF
background
#F6F5F9
surface
#EBE9F2
border
#C6C5CC
text
#07030E
muted
#7A787E