#577BDB#577BDB
#577BDB is a mid, vivid blue. Relative luminance 0.213; OKLCH L 60.3% C 0.152 H 266.5°. Best body text is #000000 at 5.26:1 contrast (WCAG AA passes).
Color values
| HEX | #577BDB |
|---|---|
| RGB | rgb(87, 123, 219) |
| HSL | hsl(224, 65%, 60%) |
| HSV | hsv(224, 60%, 86%) |
| CMYK | cmyk(60.3%, 43.8%, 0%, 14.1%) |
| CIE-LAB | lab(53.28, 16.50, -53.05) |
| CIE-LCH | lch(53.28, 55.56, 287.28°) |
| OKLab | oklab(60.3% -0.0094 -0.1513) |
| OKLCH | oklch(60.3% 0.152 266.5) |
| XYZ | xyz(23.7953, 21.3046, 69.8623) |
| Luminance | 0.2131 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Cornflower Blue
#5170D7
ΔE00 3.85
Lightish Blue
#3D7AFD
ΔE00 3.94
Soft Blue
#6488EA
ΔE00 4.70
Clear Blue
#247AFD
ΔE00 4.77
Dodger Blue
#3E82FC
ΔE00 4.93
Deep Sky Blue
#0D75F8
ΔE00 5.22
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#577BDB #DBB757
analogous
#57BDDB #577BDB #7557DB
triadic
#577BDB #DB577B #7BDB57
tetradic
#577BDB #DB57BD #DBB757 #57DB75
square
#577BDB #DB57BD #DBB757 #57DB75
split-complementary
#577BDB #DB7557 #BDDB57
monochromatic
#204197 #2B56CA #577BDB #89A3E6 #BCCAF1
Accessibility & contrast
On white
3.99
#577BDB on #FFFFFF
AA ✗AA large ✓AAA ✗
On black
5.26
#577BDB on #000000
AA ✓AA large ✓AAA ✗
Best text color
#000000 on #577BDB
5.26:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##577BDB | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##577BDB | 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)
#4F86DF
Deuteranopia (green-blind)
#3B7AD9
Tritanopia (blue-blind)
#0091A0
Achromatopsia (no color)
#7F7F7F
Design tokens & code
CSS
--color: #577bdb; /* rgb */ color: rgb(87, 123, 219); /* oklch */ color: oklch(60.3% 0.152 266.5);
Tailwind
colors: {
custom: {
50: '#91a0e7',
500: '#577bdb',
950: '#000000',
},
}SCSS
$custom: #577bdb; $custom-light: #91a0e7; $custom-dark: #000000;
JSON
{
"hex": "#577bdb",
"rgb": {
"r": 87,
"g": 123,
"b": 219
},
"hsl": {
"h": 223.636,
"s": 64.706,
"l": 60
},
"oklch": {
"l": 0.60302,
"c": 0.15155,
"h": 266.5
},
"luminance": 0.21307
}Semantic roles & 50–950 ramp
primary
#577BDB
secondary
#E0D2AD
accent
#BA40E8
background
#F9F9FE
surface
#F2F2FC
border
#CCCCD5
text
#0E0E16
muted
#7E7E84