#3F81D0#3F81D0
#3F81D0 is a mid, vivid cyan. Relative luminance 0.213; OKLCH L 59.8% C 0.139 H 254.5°. Best body text is #000000 at 5.26:1 contrast (WCAG AA passes).
Color values
| HEX | #3F81D0 |
|---|---|
| RGB | rgb(63, 129, 208) |
| HSL | hsl(213, 61%, 53%) |
| HSV | hsv(213, 70%, 82%) |
| CMYK | cmyk(69.7%, 38%, 0%, 18.4%) |
| CIE-LAB | lab(53.29, 4.97, -46.89) |
| CIE-LCH | lch(53.29, 47.15, 276.05°) |
| OKLab | oklab(59.82% -0.0371 -0.1335) |
| OKLCH | oklch(59.82% 0.139 254.5) |
| XYZ | xyz(21.2811, 21.3091, 62.6538) |
| Luminance | 0.2131 (WCAG relative) |
| Temperature | cool |
| Family | cyan |
Closest named colors
Cool Blue
#4984B8
ΔE00 3.19
Steel Blue
#4682B4
ΔE00 3.68
Windows Blue
#3778BF
ΔE00 3.82
Azure
#007FFF
ΔE00 4.14
Off Blue
#5684AE
ΔE00 4.34
Dark Sky Blue
#448EE4
ΔE00 4.78
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#3F81D0 #D08E3F
analogous
#3FC9D0 #3F81D0 #463FD0
triadic
#3F81D0 #D03F81 #81D03F
tetradic
#3F81D0 #D03FC9 #D08E3F #3FD046
square
#3F81D0 #D03FC9 #D08E3F #3FD046
split-complementary
#3F81D0 #D0463F #C9D03F
monochromatic
#1D4677 #2963A9 #3F81D0 #70A1DC #A1C2E8
Accessibility & contrast
On white
3.99
#3F81D0 on #FFFFFF
AA ✗AA large ✓AAA ✗
On black
5.26
#3F81D0 on #000000
AA ✓AA large ✓AAA ✗
Best text color
#000000 on #3F81D0
5.26:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##3F81D0 | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##3F81D0 | 1.00 | 3.99 | 5.26 | 5.26 |
| #FFFFFF | 3.99 | 1.00 | 21.00 | 21.00 |
| #000000 | 5.26 | 21.00 | 1.00 | 1.00 |
| ##000000 | 5.26 | 21.00 | 1.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#5D87D3
Deuteranopia (green-blind)
#4779CE
Tritanopia (blue-blind)
#00939E
Achromatopsia (no color)
#7F7F7F
Design tokens & code
CSS
--color: #3f81d0; /* rgb */ color: rgb(63, 129, 208); /* oklch */ color: oklch(59.8% 0.139 254.5);
Tailwind
colors: {
custom: {
50: '#84a5df',
500: '#3f81d0',
950: '#000000',
},
}SCSS
$custom: #3f81d0; $custom-light: #84a5df; $custom-dark: #000000;
JSON
{
"hex": "#3f81d0",
"rgb": {
"r": 63,
"g": 129,
"b": 208
},
"hsl": {
"h": 212.69,
"s": 60.669,
"l": 53.137
},
"oklch": {
"l": 0.59821,
"c": 0.13856,
"h": 254.5
},
"luminance": 0.21311
}Semantic roles & 50–950 ramp
primary
#3F81D0
secondary
#D5B896
accent
#9B44E4
background
#F8FAFD
surface
#F0F4FB
border
#CBCED4
text
#0C0F15
muted
#7D7F83