#1B4F8D#1B4F8D
#1B4F8D is a dark, moderate cyan. Relative luminance 0.077; OKLCH L 42.8% C 0.116 H 255.1°. Best body text is #FFFFFF at 8.24:1 contrast (WCAG AA passes).
Color values
| HEX | #1B4F8D |
|---|---|
| RGB | rgb(27, 79, 141) |
| HSL | hsl(213, 68%, 33%) |
| HSV | hsv(213, 81%, 55%) |
| CMYK | cmyk(80.9%, 44%, 0%, 44.7%) |
| CIE-LAB | lab(33.45, 6.46, -39.24) |
| CIE-LCH | lch(33.45, 39.77, 279.36°) |
| OKLab | oklab(42.79% -0.0298 -0.1124) |
| OKLCH | oklch(42.79% 0.116 255.1) |
| XYZ | xyz(8.0539, 7.7471, 26.2650) |
| Luminance | 0.0775 (WCAG relative) |
| Temperature | cool |
| Family | cyan |
Closest named colors
Dusk Blue
#26538D
ΔE00 1.43
Light Navy
#155084
ΔE00 2.09
Cobalt (survey)
#1E488F
ΔE00 2.98
Light Navy Blue
#2E5A88
ΔE00 3.93
Twilight Blue
#0A437A
ΔE00 4.27
Prussian Blue
#004577
ΔE00 4.38
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#1B4F8D #8D591B
analogous
#1B888D #1B4F8D #201B8D
triadic
#1B4F8D #8D1B4F #4F8D1B
tetradic
#1B4F8D #8D1B88 #8D591B #1B8D20
square
#1B4F8D #8D1B88 #8D591B #1B8D20
split-complementary
#1B4F8D #8D201B #888D1B
monochromatic
#071526 #11325A #1B4F8D #256CC0 #478BDC
Accessibility & contrast
On white
8.24
#1B4F8D on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.55
#1B4F8D on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #1B4F8D
8.24:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##1B4F8D | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##1B4F8D | 1.00 | 8.24 | 2.55 | 8.24 |
| #FFFFFF | 8.24 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.55 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 8.24 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#30548F
Deuteranopia (green-blind)
#1A4A8C
Tritanopia (blue-blind)
#005E67
Achromatopsia (no color)
#4F4F4F
Design tokens & code
CSS
--color: #1b4f8d; /* rgb */ color: rgb(27, 79, 141); /* oklch */ color: oklch(42.8% 0.116 255.1);
Tailwind
colors: {
custom: {
50: '#6a7faf',
500: '#1b4f8d',
950: '#000000',
},
}SCSS
$custom: #1b4f8d; $custom-light: #6a7faf; $custom-dark: #000000;
JSON
{
"hex": "#1b4f8d",
"rgb": {
"r": 27,
"g": 79,
"b": 141
},
"hsl": {
"h": 212.632,
"s": 67.857,
"l": 32.941
},
"oklch": {
"l": 0.42789,
"c": 0.11626,
"h": 255.1
},
"luminance": 0.07748
}Semantic roles & 50–950 ramp
primary
#1B4F8D
secondary
#BD8746
accent
#9C3DEB
background
#F6F7FA
surface
#ECEEF4
border
#C7C9CE
text
#080A10
muted
#7A7C7F