#1B104B#1B104B
#1B104B is a very dark, moderate violet. Relative luminance 0.011; OKLCH L 23.4% C 0.103 H 283.6°. Best body text is #FFFFFF at 17.18:1 contrast (WCAG AA passes).
Color values
| HEX | #1B104B |
|---|---|
| RGB | rgb(27, 16, 75) |
| HSL | hsl(251, 65%, 18%) |
| HSV | hsv(251, 79%, 29%) |
| CMYK | cmyk(64%, 78.7%, 0%, 70.6%) |
| CIE-LAB | lab(9.89, 24.28, -34.60) |
| CIE-LCH | lch(9.89, 42.26, 305.06°) |
| OKLab | oklab(23.38% 0.0242 -0.0996) |
| OKLCH | oklch(23.38% 0.103 283.6) |
| XYZ | xyz(1.9069, 1.1115, 6.7693) |
| Luminance | 0.0111 (WCAG relative) |
| Temperature | cool |
| Family | violet |
Closest named colors
Dark Indigo
#1F0954
ΔE00 3.11
Night Blue
#040348
ΔE00 3.81
Navy Blue (survey)
#001146
ΔE00 4.34
Midnight Blue (survey)
#020035
ΔE00 5.78
Dark Blue
#00035B
ΔE00 5.80
Darkblue (survey)
#030764
ΔE00 6.25
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#1B104B #404B10
analogous
#10234B #1B104B #38104B
triadic
#1B104B #4B1B10 #104B1B
tetradic
#1B104B #4B1023 #404B10 #104B38
square
#1B104B #4B1023 #404B10 #104B38
split-complementary
#1B104B #4B3810 #234B10
monochromatic
#090519 #090519 #1B104B #2D1B7D #3F26B0
Accessibility & contrast
On white
17.18
#1B104B on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
1.22
#1B104B on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #1B104B
17.18:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##1B104B | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##1B104B | 1.00 | 17.18 | 1.22 | 17.18 |
| #FFFFFF | 17.18 | 1.00 | 21.00 | 1.00 |
| #000000 | 1.22 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 17.18 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#001D4D
Deuteranopia (green-blind)
#00194A
Tritanopia (blue-blind)
#03202C
Achromatopsia (no color)
#1B1B1B
Design tokens & code
CSS
--color: #1b104b; /* rgb */ color: rgb(27, 16, 75); /* oklch */ color: oklch(23.4% 0.103 283.6);
Tailwind
colors: {
custom: {
50: '#5e4f7e',
500: '#1b104b',
950: '#000000',
},
}SCSS
$custom: #1b104b; $custom-light: #5e4f7e; $custom-dark: #000000;
JSON
{
"hex": "#1b104b",
"rgb": {
"r": 27,
"g": 16,
"b": 75
},
"hsl": {
"h": 251.186,
"s": 64.835,
"l": 17.843
},
"oklch": {
"l": 0.23375,
"c": 0.10252,
"h": 283.6
},
"luminance": 0.01112
}Semantic roles & 50–950 ramp
primary
#1B104B
secondary
#758532
accent
#E840C9
background
#F5F4F7
surface
#E9E7EE
border
#C5C3C9
text
#05020A
muted
#79787C