#1B488E#1B488E
#1B488E is a dark, vivid blue. Relative luminance 0.068; OKLCH L 41.2% C 0.126 H 259.2°. Best body text is #FFFFFF at 8.88:1 contrast (WCAG AA passes).
Color values
| HEX | #1B488E |
|---|---|
| RGB | rgb(27, 72, 142) |
| HSL | hsl(217, 68%, 33%) |
| HSV | hsv(217, 81%, 56%) |
| CMYK | cmyk(81%, 49.3%, 0%, 44.3%) |
| CIE-LAB | lab(31.39, 11.60, -43.16) |
| CIE-LCH | lch(31.39, 44.69, 285.04°) |
| OKLab | oklab(41.22% -0.0236 -0.124) |
| OKLCH | oklch(41.22% 0.126 259.2) |
| XYZ | xyz(7.6501, 6.8198, 26.4991) |
| Luminance | 0.0682 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Cobalt (survey)
#1E488F
ΔE00 0.41
Darkish Blue
#014182
ΔE00 2.90
Twilight Blue
#0A437A
ΔE00 3.44
Dusk Blue
#26538D
ΔE00 3.72
Cobalt
#0047AB
ΔE00 3.89
Light Navy
#155084
ΔE00 4.35
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#1B488E #8E611B
analogous
#1B818E #1B488E #281B8E
triadic
#1B488E #8E1B48 #488E1B
tetradic
#1B488E #8E1B81 #8E611B #1B8E28
square
#1B488E #8E1B81 #8E611B #1B8E28
split-complementary
#1B488E #8E281B #818E1B
monochromatic
#071427 #112E5B #1B488E #2562C1 #4782DC
Accessibility & contrast
On white
8.88
#1B488E on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.36
#1B488E on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #1B488E
8.88:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##1B488E | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##1B488E | 1.00 | 8.88 | 2.36 | 8.88 |
| #FFFFFF | 8.88 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.36 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 8.88 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#204F91
Deuteranopia (green-blind)
#00458D
Tritanopia (blue-blind)
#005964
Achromatopsia (no color)
#4A4A4A
Design tokens & code
CSS
--color: #1b488e; /* rgb */ color: rgb(27, 72, 142); /* oklch */ color: oklch(41.2% 0.126 259.2);
Tailwind
colors: {
custom: {
50: '#6b7aaf',
500: '#1b488e',
950: '#000000',
},
}SCSS
$custom: #1b488e; $custom-light: #6b7aaf; $custom-dark: #000000;
JSON
{
"hex": "#1b488e",
"rgb": {
"r": 27,
"g": 72,
"b": 142
},
"hsl": {
"h": 216.522,
"s": 68.047,
"l": 33.137
},
"oklch": {
"l": 0.41221,
"c": 0.12627,
"h": 259.2
},
"luminance": 0.06821
}Semantic roles & 50–950 ramp
primary
#1B488E
secondary
#BE8F47
accent
#A73DEB
background
#F6F7FA
surface
#ECEDF5
border
#C7C8CF
text
#080910
muted
#7A7B7F