#637FF9#637FF9
#637FF9 is a light, vivid blue. Relative luminance 0.247; OKLCH L 63.7% C 0.184 H 270.7°. Best body text is #000000 at 5.93:1 contrast (WCAG AA passes).
Color values
| HEX | #637FF9 |
|---|---|
| RGB | rgb(99, 127, 249) |
| HSL | hsl(229, 93%, 68%) |
| HSV | hsv(229, 60%, 98%) |
| CMYK | cmyk(60.2%, 49%, 0%, 2.4%) |
| CIE-LAB | lab(56.75, 26.20, -64.19) |
| CIE-LCH | lch(56.75, 69.33, 292.20°) |
| OKLab | oklab(63.69% 0.0022 -0.1837) |
| OKLCH | oklch(63.69% 0.184 270.7) |
| XYZ | xyz(29.8281, 24.6685, 92.7938) |
| Luminance | 0.2467 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Cornflower
#6A79F7
ΔE00 2.53
Soft Blue
#6488EA
ΔE00 3.57
Lightish Blue
#3D7AFD
ΔE00 4.27
Dodger Blue
#3E82FC
ΔE00 5.01
Clear Blue
#247AFD
ΔE00 6.02
Lavender Blue
#8B88F8
ΔE00 6.82
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#637FF9 #F9DD63
analogous
#63CAF9 #637FF9 #9263F9
triadic
#637FF9 #F9637F #7FF963
tetradic
#637FF9 #F963CA #F9DD63 #63F992
square
#637FF9 #F963CA #F9DD63 #63F992
split-complementary
#637FF9 #F99263 #CAF963
monochromatic
#082FD9 #284FF7 #637FF9 #9EAFFB #D9E0FE
Accessibility & contrast
On white
3.54
#637FF9 on #FFFFFF
AA ✗AA large ✓AAA ✗
On black
5.93
#637FF9 on #000000
AA ✓AA large ✓AAA ✗
Best text color
#000000 on #637FF9
5.93:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##637FF9 | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##637FF9 | 1.00 | 3.54 | 5.93 | 5.93 |
| #FFFFFF | 3.54 | 1.00 | 21.00 | 21.00 |
| #000000 | 5.93 | 21.00 | 1.00 | 1.00 |
| ##000000 | 5.93 | 21.00 | 1.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#3E8FFD
Deuteranopia (green-blind)
#1D82F6
Tritanopia (blue-blind)
#009BB0
Achromatopsia (no color)
#888888
Design tokens & code
CSS
--color: #637ff9; /* rgb */ color: rgb(99, 127, 249); /* oklch */ color: oklch(63.7% 0.184 270.7);
Tailwind
colors: {
custom: {
50: '#9ca3fc',
500: '#637ff9',
950: '#000000',
},
}SCSS
$custom: #637ff9; $custom-light: #9ca3fc; $custom-dark: #000000;
JSON
{
"hex": "#637ff9",
"rgb": {
"r": 99,
"g": 127,
"b": 249
},
"hsl": {
"h": 228.8,
"s": 92.593,
"l": 68.235
},
"oklch": {
"l": 0.63693,
"c": 0.18371,
"h": 270.7
},
"luminance": 0.24671
}Semantic roles & 50–950 ramp
primary
#637FF9
secondary
#F3EAC5
accent
#BB00E6
background
#FAFAFF
surface
#F4F3FF
border
#CECDD7
text
#0F0F18
muted
#7F7F86