#428ACD#428ACD
#428ACD is a mid, vivid cyan. Relative luminance 0.237; OKLCH L 61.8% C 0.125 H 249.1°. Best body text is #000000 at 5.75:1 contrast (WCAG AA passes).
Color values
| HEX | #428ACD |
|---|---|
| RGB | rgb(66, 138, 205) |
| HSL | hsl(209, 58%, 53%) |
| HSV | hsv(209, 68%, 80%) |
| CMYK | cmyk(67.8%, 32.7%, 0%, 19.6%) |
| CIE-LAB | lab(55.83, -0.98, -41.17) |
| CIE-LCH | lch(55.83, 41.18, 268.63°) |
| OKLab | oklab(61.79% -0.0446 -0.1166) |
| OKLCH | oklch(61.79% 0.125 249.1) |
| XYZ | xyz(22.3506, 23.7406, 61.1503) |
| Luminance | 0.2374 (WCAG relative) |
| Temperature | cool |
| Family | cyan |
Closest named colors
Dark Sky Blue
#448EE4
ΔE00 2.98
Cool Blue
#4984B8
ΔE00 3.02
Cerulean (survey)
#0485D1
ΔE00 3.43
Water Blue
#0E87CC
ΔE00 3.72
Steel Blue
#4682B4
ΔE00 3.86
Off Blue
#5684AE
ΔE00 4.49
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#428ACD #CD8542
analogous
#42CDCB #428ACD #4244CD
triadic
#428ACD #CD428A #8ACD42
tetradic
#428ACD #CB42CD #CD8542 #44CD42
square
#428ACD #CB42CD #CD8542 #44CD42
split-complementary
#428ACD #CD4244 #CDCB42
monochromatic
#1F4C76 #2C6BA6 #428ACD #72A8DA #A3C6E7
Accessibility & contrast
On white
3.65
#428ACD on #FFFFFF
AA ✗AA large ✓AAA ✗
On black
5.75
#428ACD on #000000
AA ✓AA large ✓AAA ✗
Best text color
#000000 on #428ACD
5.75:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##428ACD | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##428ACD | 1.00 | 3.65 | 5.75 | 5.75 |
| #FFFFFF | 3.65 | 1.00 | 21.00 | 21.00 |
| #000000 | 5.75 | 21.00 | 1.00 | 1.00 |
| ##000000 | 5.75 | 21.00 | 1.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#6C8DD0
Deuteranopia (green-blind)
#5980CC
Tritanopia (blue-blind)
#009AA2
Achromatopsia (no color)
#868686
Design tokens & code
CSS
--color: #428acd; /* rgb */ color: rgb(66, 138, 205); /* oklch */ color: oklch(61.8% 0.125 249.1);
Tailwind
colors: {
custom: {
50: '#85abdc',
500: '#428acd',
950: '#000000',
},
}SCSS
$custom: #428acd; $custom-light: #85abdc; $custom-dark: #000000;
JSON
{
"hex": "#428acd",
"rgb": {
"r": 66,
"g": 138,
"b": 205
},
"hsl": {
"h": 208.921,
"s": 58.159,
"l": 53.137
},
"oklch": {
"l": 0.6179,
"c": 0.12485,
"h": 249.1
},
"luminance": 0.23743
}Semantic roles & 50–950 ramp
primary
#428ACD
secondary
#D3B497
accent
#9146E1
background
#F8FAFD
surface
#F0F4FB
border
#CBCED4
text
#0C1015
muted
#7D7F83