#577BBF#577BBF
#577BBF is a mid, moderate blue. Relative luminance 0.200; OKLCH L 58.7% C 0.113 H 262.3°. Best body text is #000000 at 4.99:1 contrast (WCAG AA passes).
Color values
| HEX | #577BBF |
|---|---|
| RGB | rgb(87, 123, 191) |
| HSL | hsl(219, 45%, 55%) |
| HSV | hsv(219, 54%, 75%) |
| CMYK | cmyk(54.5%, 35.6%, 0%, 25.1%) |
| CIE-LAB | lab(51.78, 7.27, -39.52) |
| CIE-LCH | lch(51.78, 40.18, 280.42°) |
| OKLab | oklab(58.66% -0.0152 -0.1116) |
| OKLCH | oklch(58.66% 0.113 262.3) |
| XYZ | xyz(20.4142, 19.9522, 52.0555) |
| Luminance | 0.1995 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Cornflower Blue
#5170D7
ΔE00 4.77
Windows Blue
#3778BF
ΔE00 4.98
Off Blue
#5684AE
ΔE00 5.19
Dusty Blue
#5A86AD
ΔE00 5.74
Cool Blue
#4984B8
ΔE00 5.91
Faded Blue
#658CBB
ΔE00 6.02
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#577BBF #BF9B57
analogous
#57AFBF #577BBF #6757BF
triadic
#577BBF #BF577B #7BBF57
tetradic
#577BBF #BF57AF #BF9B57 #57BF67
square
#577BBF #BF57AF #BF9B57 #57BF67
split-complementary
#577BBF #BF6757 #AFBF57
monochromatic
#2B4371 #3C5D9D #577BBF #839ED0 #B0C1E1
Accessibility & contrast
On white
4.21
#577BBF on #FFFFFF
AA ✗AA large ✓AAA ✗
On black
4.99
#577BBF on #000000
AA ✓AA large ✓AAA ✗
Best text color
#000000 on #577BBF
4.99:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##577BBF | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##577BBF | 1.00 | 4.21 | 4.99 | 4.99 |
| #FFFFFF | 4.21 | 1.00 | 21.00 | 21.00 |
| #000000 | 4.99 | 21.00 | 1.00 | 1.00 |
| ##000000 | 4.99 | 21.00 | 1.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#6081C2
Deuteranopia (green-blind)
#5377BE
Tritanopia (blue-blind)
#1C8A94
Achromatopsia (no color)
#7B7B7B
Design tokens & code
CSS
--color: #577bbf; /* rgb */ color: rgb(87, 123, 191); /* oklch */ color: oklch(58.7% 0.113 262.3);
Tailwind
colors: {
custom: {
50: '#8da0d2',
500: '#577bbf',
950: '#000000',
},
}SCSS
$custom: #577bbf; $custom-light: #8da0d2; $custom-dark: #000000;
JSON
{
"hex": "#577bbf",
"rgb": {
"r": 87,
"g": 123,
"b": 191
},
"hsl": {
"h": 219.231,
"s": 44.828,
"l": 54.51
},
"oklch": {
"l": 0.58658,
"c": 0.11267,
"h": 262.3
},
"luminance": 0.19954
}Semantic roles & 50–950 ramp
primary
#577BBF
secondary
#CFC0A3
accent
#A853D5
background
#F9F9FC
surface
#F1F2F9
border
#CBCCD2
text
#0D0E14
muted
#7E7E82