#1B4AA1#1B4AA1
#1B4AA1 is a dark, vivid blue. Relative luminance 0.077; OKLCH L 43.2% C 0.150 H 261.4°. Best body text is #FFFFFF at 8.27:1 contrast (WCAG AA passes).
Color values
| HEX | #1B4AA1 |
|---|---|
| RGB | rgb(27, 74, 161) |
| HSL | hsl(219, 71%, 37%) |
| HSV | hsv(219, 83%, 63%) |
| CMYK | cmyk(83.2%, 54%, 0%, 36.9%) |
| CIE-LAB | lab(33.36, 17.92, -51.52) |
| CIE-LCH | lch(33.36, 54.55, 289.18°) |
| OKLab | oklab(43.16% -0.0226 -0.1486) |
| OKLCH | oklch(43.16% 0.15 261.4) |
| XYZ | xyz(9.3315, 7.7026, 34.7062) |
| Luminance | 0.0770 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Cobalt
#0047AB
ΔE00 1.72
Cobalt (survey)
#1E488F
ΔE00 2.45
Sapphire
#0F52BA
ΔE00 3.90
Dusk Blue
#26538D
ΔE00 4.34
Darkish Blue
#014182
ΔE00 5.16
Light Navy
#155084
ΔE00 5.61
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#1B4AA1 #A1721B
analogous
#1B8DA1 #1B4AA1 #2F1BA1
triadic
#1B4AA1 #A11B4A #4AA11B
tetradic
#1B4AA1 #A11B8D #A1721B #1BA12F
square
#1B4AA1 #A11B8D #A1721B #1BA12F
split-complementary
#1B4AA1 #A12F1B #8DA11B
monochromatic
#091A38 #12326D #1B4AA1 #2462D5 #5486E2
Accessibility & contrast
On white
8.27
#1B4AA1 on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.54
#1B4AA1 on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #1B4AA1
8.27:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##1B4AA1 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##1B4AA1 | 1.00 | 8.27 | 2.54 | 8.27 |
| #FFFFFF | 8.27 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.54 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 8.27 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#0255A4
Deuteranopia (green-blind)
#00499F
Tritanopia (blue-blind)
#005F6E
Achromatopsia (no color)
#4E4E4E
Design tokens & code
CSS
--color: #1b4aa1; /* rgb */ color: rgb(27, 74, 161); /* oklch */ color: oklch(43.2% 0.150 261.4);
Tailwind
colors: {
custom: {
50: '#6f7bbd',
500: '#1b4aa1',
950: '#000000',
},
}SCSS
$custom: #1b4aa1; $custom-light: #6f7bbd; $custom-dark: #000000;
JSON
{
"hex": "#1b4aa1",
"rgb": {
"r": 27,
"g": 74,
"b": 161
},
"hsl": {
"h": 218.955,
"s": 71.277,
"l": 36.863
},
"oklch": {
"l": 0.43159,
"c": 0.15032,
"h": 261.4
},
"luminance": 0.07704
}Semantic roles & 50–950 ramp
primary
#1B4AA1
secondary
#C59D52
accent
#AF3AEE
background
#F7F7FB
surface
#EDEDF7
border
#C8C8D0
text
#090912
muted
#7B7B81