#1B64B1#1B64B1
#1B64B1 is a mid, vivid cyan. Relative luminance 0.125; OKLCH L 50.2% C 0.141 H 253.7°. Best body text is #FFFFFF at 5.99:1 contrast (WCAG AA passes).
Color values
| HEX | #1B64B1 |
|---|---|
| RGB | rgb(27, 100, 177) |
| HSL | hsl(211, 74%, 40%) |
| HSV | hsv(211, 85%, 69%) |
| CMYK | cmyk(84.7%, 43.5%, 0%, 30.6%) |
| CIE-LAB | lab(42.03, 7.10, -47.05) |
| CIE-LCH | lch(42.03, 47.58, 278.58°) |
| OKLab | oklab(50.18% -0.0395 -0.1349) |
| OKLCH | oklch(50.18% 0.141 253.7) |
| XYZ | xyz(12.9420, 12.5201, 43.3209) |
| Luminance | 0.1252 (WCAG relative) |
| Temperature | cool |
| Family | cyan |
Closest named colors
Mid Blue
#276AB3
ΔE00 2.10
Denim
#1560BD
ΔE00 2.29
Medium Blue
#2C6FBB
ΔE00 4.03
French Blue
#436BAD
ΔE00 4.36
Denim (survey)
#3B638C
ΔE00 4.52
Muted Blue
#3B719F
ΔE00 5.34
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#1B64B1 #B1681B
analogous
#1BAFB1 #1B64B1 #1D1BB1
triadic
#1B64B1 #B11B64 #64B11B
tetradic
#1B64B1 #B11BAF #B1681B #1BB11D
square
#1B64B1 #B11BAF #B1681B #1BB11D
split-complementary
#1B64B1 #B11D1B #AFB11B
monochromatic
#0B2847 #13467C #1B64B1 #2B82DF #60A1E7
Accessibility & contrast
On white
5.99
#1B64B1 on #FFFFFF
AA ✓AA large ✓AAA ✗
On black
3.50
#1B64B1 on #000000
AA ✗AA large ✓AAA ✗
Best text color
#FFFFFF on #1B64B1
5.99:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##1B64B1 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##1B64B1 | 1.00 | 5.99 | 3.50 | 5.99 |
| #FFFFFF | 5.99 | 1.00 | 21.00 | 1.00 |
| #000000 | 3.50 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 5.99 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#3C6AB4
Deuteranopia (green-blind)
#1F5DAF
Tritanopia (blue-blind)
#007682
Achromatopsia (no color)
#636363
Design tokens & code
CSS
--color: #1b64b1; /* rgb */ color: rgb(27, 100, 177); /* oklch */ color: oklch(50.2% 0.141 253.7);
Tailwind
colors: {
custom: {
50: '#728fc9',
500: '#1b64b1',
950: '#000000',
},
}SCSS
$custom: #1b64b1; $custom-light: #728fc9; $custom-dark: #000000;
JSON
{
"hex": "#1b64b1",
"rgb": {
"r": 27,
"g": 100,
"b": 177
},
"hsl": {
"h": 210.8,
"s": 73.529,
"l": 40
},
"oklch": {
"l": 0.50183,
"c": 0.14056,
"h": 253.7
},
"luminance": 0.12522
}Semantic roles & 50–950 ramp
primary
#1B64B1
secondary
#CB955D
accent
#9638F0
background
#F7F8FC
surface
#EEF0F8
border
#C9CBD1
text
#090C13
muted
#7B7D82