#42A4CB#42A4CB
#42A4CB is a light, moderate cyan. Relative luminance 0.320; OKLCH L 67.7% C 0.107 H 227.9°. Best body text is #000000 at 7.40:1 contrast (WCAG AA passes).
Color values
| HEX | #42A4CB |
|---|---|
| RGB | rgb(66, 164, 203) |
| HSL | hsl(197, 57%, 53%) |
| HSV | hsv(197, 67%, 80%) |
| CMYK | cmyk(67.5%, 19.2%, 0%, 20.4%) |
| CIE-LAB | lab(63.36, -16.25, -28.30) |
| CIE-LCH | lch(63.36, 32.64, 240.14°) |
| OKLab | oklab(67.73% -0.0715 -0.0792) |
| OKLCH | oklch(67.73% 0.107 227.9) |
| XYZ | xyz(26.2974, 32.0181, 61.2825) |
| Luminance | 0.3202 (WCAG relative) |
| Temperature | cool |
| Family | cyan |
Closest named colors
Greyblue
#77A1B5
ΔE00 7.18
Deepskyblue
#00BFFF
ΔE00 8.84
Turquoise Blue
#06B1C4
ΔE00 9.35
Bluegrey
#85A3B2
ΔE00 9.95
Azure (survey)
#069AF3
ΔE00 10.17
Bright Sky Blue
#02CCFE
ΔE00 11.00
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#42A4CB #CB6942
analogous
#42CBAD #42A4CB #4260CB
triadic
#42A4CB #CB42A4 #A4CB42
tetradic
#42A4CB #AD42CB #CB6942 #60CB42
square
#42A4CB #AD42CB #CB6942 #60CB42
split-complementary
#42A4CB #CB4260 #CBAD42
monochromatic
#205B73 #2D81A3 #42A4CB #72BBD8 #A2D2E5
Accessibility & contrast
On white
2.84
#42A4CB on #FFFFFF
AA ✗AA large ✗AAA ✗
On black
7.40
#42A4CB on #000000
AA ✓AA large ✓AAA ✓
Best text color
#000000 on #42A4CB
7.40:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##42A4CB | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##42A4CB | 1.00 | 2.84 | 7.40 | 7.40 |
| #FFFFFF | 2.84 | 1.00 | 21.00 | 21.00 |
| #000000 | 7.40 | 21.00 | 1.00 | 1.00 |
| ##000000 | 7.40 | 21.00 | 1.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#8FA1CD
Deuteranopia (green-blind)
#7D93CB
Tritanopia (blue-blind)
#00AFB1
Achromatopsia (no color)
#999999
Design tokens & code
CSS
--color: #42a4cb; /* rgb */ color: rgb(66, 164, 203); /* oklch */ color: oklch(67.7% 0.107 227.9);
Tailwind
colors: {
custom: {
50: '#86bfdb',
500: '#42a4cb',
950: '#000000',
},
}SCSS
$custom: #42a4cb; $custom-light: #86bfdb; $custom-dark: #000000;
JSON
{
"hex": "#42a4cb",
"rgb": {
"r": 66,
"g": 164,
"b": 203
},
"hsl": {
"h": 197.08,
"s": 56.846,
"l": 52.745
},
"oklch": {
"l": 0.67731,
"c": 0.10671,
"h": 227.9
},
"luminance": 0.32021
}Semantic roles & 50–950 ramp
primary
#42A4CB
secondary
#D2A897
accent
#7348E0
background
#F8FBFD
surface
#F0F7FA
border
#CBD0D3
text
#0C1215
muted
#7D8183