#577DDB#577DDB
#577DDB is a mid, vivid blue. Relative luminance 0.218; OKLCH L 60.7% C 0.149 H 265.6°. Best body text is #000000 at 5.36:1 contrast (WCAG AA passes).
Color values
| HEX | #577DDB |
|---|---|
| RGB | rgb(87, 125, 219) |
| HSL | hsl(223, 65%, 60%) |
| HSV | hsv(223, 60%, 86%) |
| CMYK | cmyk(60.3%, 42.9%, 0%, 14.1%) |
| CIE-LAB | lab(53.82, 15.28, -52.19) |
| CIE-LCH | lch(53.82, 54.38, 286.32°) |
| OKLab | oklab(60.72% -0.0114 -0.1487) |
| OKLCH | oklch(60.72% 0.149 265.6) |
| XYZ | xyz(24.0459, 21.8059, 69.9459) |
| Luminance | 0.2181 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Lightish Blue
#3D7AFD
ΔE00 3.88
Soft Blue
#6488EA
ΔE00 4.16
Dodger Blue
#3E82FC
ΔE00 4.45
Cornflower Blue
#5170D7
ΔE00 4.55
Clear Blue
#247AFD
ΔE00 4.61
Deep Sky Blue
#0D75F8
ΔE00 5.27
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#577DDB #DBB557
analogous
#57BFDB #577DDB #7357DB
triadic
#577DDB #DB577D #7DDB57
tetradic
#577DDB #DB57BF #DBB557 #57DB73
square
#577DDB #DB57BF #DBB557 #57DB73
split-complementary
#577DDB #DB7357 #BFDB57
monochromatic
#204397 #2B59CA #577DDB #89A4E6 #BCCBF1
Accessibility & contrast
On white
3.92
#577DDB on #FFFFFF
AA ✗AA large ✓AAA ✗
On black
5.36
#577DDB on #000000
AA ✓AA large ✓AAA ✗
Best text color
#000000 on #577DDB
5.36:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##577DDB | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##577DDB | 1.00 | 3.92 | 5.36 | 5.36 |
| #FFFFFF | 3.92 | 1.00 | 21.00 | 21.00 |
| #000000 | 5.36 | 21.00 | 1.00 | 1.00 |
| ##000000 | 5.36 | 21.00 | 1.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#5287DF
Deuteranopia (green-blind)
#3F7BD9
Tritanopia (blue-blind)
#0092A1
Achromatopsia (no color)
#818181
Design tokens & code
CSS
--color: #577ddb; /* rgb */ color: rgb(87, 125, 219); /* oklch */ color: oklch(60.7% 0.149 265.6);
Tailwind
colors: {
custom: {
50: '#91a2e7',
500: '#577ddb',
950: '#000000',
},
}SCSS
$custom: #577ddb; $custom-light: #91a2e7; $custom-dark: #000000;
JSON
{
"hex": "#577ddb",
"rgb": {
"r": 87,
"g": 125,
"b": 219
},
"hsl": {
"h": 222.727,
"s": 64.706,
"l": 60
},
"oklch": {
"l": 0.60716,
"c": 0.14915,
"h": 265.6
},
"luminance": 0.21808
}Semantic roles & 50–950 ramp
primary
#577DDB
secondary
#E0D2AD
accent
#B740E8
background
#F9F9FE
surface
#F2F2FC
border
#CCCCD5
text
#0E0F16
muted
#7E7E84