#5178CC#5178CC
#5178CC is a mid, vivid blue. Relative luminance 0.195; OKLCH L 58.4% C 0.137 H 263.9°. Best body text is #000000 at 4.91:1 contrast (WCAG AA passes).
Color values
| HEX | #5178CC |
|---|---|
| RGB | rgb(81, 120, 204) |
| HSL | hsl(221, 55%, 56%) |
| HSV | hsv(221, 60%, 80%) |
| CMYK | cmyk(60.3%, 41.2%, 0%, 20%) |
| CIE-LAB | lab(51.31, 12.15, -47.71) |
| CIE-LCH | lch(51.31, 49.23, 284.29°) |
| OKLab | oklab(58.43% -0.0145 -0.1357) |
| OKLCH | oklch(58.43% 0.137 263.9) |
| XYZ | xyz(21.0051, 19.5401, 59.7797) |
| Luminance | 0.1954 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Cornflower Blue
#5170D7
ΔE00 3.35
Windows Blue
#3778BF
ΔE00 4.98
Deep Sky Blue
#0D75F8
ΔE00 5.25
Lightish Blue
#3D7AFD
ΔE00 5.39
Cerulean Blue
#056EEE
ΔE00 5.52
Clear Blue
#247AFD
ΔE00 5.54
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#5178CC #CCA551
analogous
#51B5CC #5178CC #6751CC
triadic
#5178CC #CC5178 #78CC51
tetradic
#5178CC #CC51B5 #CCA551 #51CC67
square
#5178CC #CC51B5 #CCA551 #51CC67
split-complementary
#5178CC #CC6751 #B5CC51
monochromatic
#25417E #335AAD #5178CC #809DDA #B0C1E8
Accessibility & contrast
On white
4.28
#5178CC on #FFFFFF
AA ✗AA large ✓AAA ✗
On black
4.91
#5178CC on #000000
AA ✓AA large ✓AAA ✗
Best text color
#000000 on #5178CC
4.91:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##5178CC | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##5178CC | 1.00 | 4.28 | 4.91 | 4.91 |
| #FFFFFF | 4.28 | 1.00 | 21.00 | 21.00 |
| #000000 | 4.91 | 21.00 | 1.00 | 1.00 |
| ##000000 | 4.91 | 21.00 | 1.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#5380CF
Deuteranopia (green-blind)
#4275CA
Tritanopia (blue-blind)
#008B98
Achromatopsia (no color)
#7A7A7A
Design tokens & code
CSS
--color: #5178cc; /* rgb */ color: rgb(81, 120, 204); /* oklch */ color: oklch(58.4% 0.137 263.9);
Tailwind
colors: {
custom: {
50: '#8c9edc',
500: '#5178cc',
950: '#000000',
},
}SCSS
$custom: #5178cc; $custom-light: #8c9edc; $custom-dark: #000000;
JSON
{
"hex": "#5178cc",
"rgb": {
"r": 81,
"g": 120,
"b": 204
},
"hsl": {
"h": 220.976,
"s": 54.667,
"l": 55.882
},
"oklch": {
"l": 0.58432,
"c": 0.13651,
"h": 263.9
},
"luminance": 0.19542
}Semantic roles & 50–950 ramp
primary
#5178CC
secondary
#D6C6A3
accent
#AF4ADE
background
#F9F9FD
surface
#F1F2FB
border
#CBCCD4
text
#0D0E15
muted
#7E7E83