#42A8D3#42A8D3
#42A8D3 is a light, moderate cyan. Relative luminance 0.339; OKLCH L 69.0% C 0.112 H 229.6°. Best body text is #000000 at 7.77:1 contrast (WCAG AA passes).
Color values
| HEX | #42A8D3 |
|---|---|
| RGB | rgb(66, 168, 211) |
| HSL | hsl(198, 62%, 54%) |
| HSV | hsv(198, 69%, 83%) |
| CMYK | cmyk(68.7%, 20.4%, 0%, 17.3%) |
| CIE-LAB | lab(64.85, -15.81, -30.43) |
| CIE-LCH | lch(64.85, 34.29, 242.55°) |
| OKLab | oklab(69.03% -0.0726 -0.0853) |
| OKLCH | oklch(69.03% 0.112 229.6) |
| XYZ | xyz(28.0026, 33.8636, 66.6759) |
| Luminance | 0.3387 (WCAG relative) |
| Temperature | cool |
| Family | cyan |
Closest named colors
Deepskyblue
#00BFFF
ΔE00 7.33
Greyblue
#77A1B5
ΔE00 7.79
Azure (survey)
#069AF3
ΔE00 9.62
Bright Sky Blue
#02CCFE
ΔE00 9.85
Turquoise Blue
#06B1C4
ΔE00 9.90
Lightblue (survey)
#7BC8F6
ΔE00 9.90
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#42A8D3 #D36D42
analogous
#42D3B6 #42A8D3 #4260D3
triadic
#42A8D3 #D342A8 #A8D342
tetradic
#42A8D3 #B642D3 #D36D42 #60D342
square
#42A8D3 #B642D3 #D36D42 #60D342
split-complementary
#42A8D3 #D34260 #D3B642
monochromatic
#1D617D #2987AF #42A8D3 #74BFDF #A5D6EA
Accessibility & contrast
On white
2.70
#42A8D3 on #FFFFFF
AA ✗AA large ✗AAA ✗
On black
7.77
#42A8D3 on #000000
AA ✓AA large ✓AAA ✓
Best text color
#000000 on #42A8D3
7.77:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##42A8D3 | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##42A8D3 | 1.00 | 2.70 | 7.77 | 7.77 |
| #FFFFFF | 2.70 | 1.00 | 21.00 | 21.00 |
| #000000 | 7.77 | 21.00 | 1.00 | 1.00 |
| ##000000 | 7.77 | 21.00 | 1.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#92A5D5
Deuteranopia (green-blind)
#7E97D2
Tritanopia (blue-blind)
#00B4B6
Achromatopsia (no color)
#9D9D9D
Design tokens & code
CSS
--color: #42a8d3; /* rgb */ color: rgb(66, 168, 211); /* oklch */ color: oklch(69.0% 0.112 229.6);
Tailwind
colors: {
custom: {
50: '#87c1e0',
500: '#42a8d3',
950: '#000000',
},
}SCSS
$custom: #42a8d3; $custom-light: #87c1e0; $custom-dark: #000000;
JSON
{
"hex": "#42a8d3",
"rgb": {
"r": 66,
"g": 168,
"b": 211
},
"hsl": {
"h": 197.793,
"s": 62.232,
"l": 54.314
},
"oklch": {
"l": 0.6903,
"c": 0.11203,
"h": 229.6
},
"luminance": 0.33867
}Semantic roles & 50–950 ramp
primary
#42A8D3
secondary
#D7AC9A
accent
#7342E5
background
#F8FBFD
surface
#F0F7FB
border
#CBD0D4
text
#0D1215
muted
#7D8183