#577BBD#577BBD
#577BBD is a mid, moderate blue. Relative luminance 0.199; OKLCH L 58.5% C 0.110 H 261.8°. Best body text is #000000 at 4.97:1 contrast (WCAG AA passes).
Color values
| HEX | #577BBD |
|---|---|
| RGB | rgb(87, 123, 189) |
| HSL | hsl(219, 44%, 54%) |
| HSV | hsv(219, 54%, 74%) |
| CMYK | cmyk(54%, 34.9%, 0%, 25.9%) |
| CIE-LAB | lab(51.68, 6.62, -38.53) |
| CIE-LCH | lch(51.68, 39.09, 279.75°) |
| OKLab | oklab(58.55% -0.0157 -0.1088) |
| OKLCH | oklch(58.55% 0.11 261.8) |
| XYZ | xyz(20.1956, 19.8648, 50.9043) |
| Luminance | 0.1987 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Windows Blue
#3778BF
ΔE00 4.89
Cornflower Blue
#5170D7
ΔE00 4.90
Off Blue
#5684AE
ΔE00 5.10
Dusty Blue
#5A86AD
ΔE00 5.67
Cool Blue
#4984B8
ΔE00 5.82
Steel Blue
#4682B4
ΔE00 5.98
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#577BBD #BD9957
analogous
#57AEBD #577BBD #6657BD
triadic
#577BBD #BD577B #7BBD57
tetradic
#577BBD #BD57AE #BD9957 #57BD66
square
#577BBD #BD57AE #BD9957 #57BD66
split-complementary
#577BBD #BD6657 #AEBD57
monochromatic
#2B436E #3D5E9A #577BBD #839ECE #AFC0E0
Accessibility & contrast
On white
4.22
#577BBD on #FFFFFF
AA ✗AA large ✓AAA ✗
On black
4.97
#577BBD on #000000
AA ✓AA large ✓AAA ✗
Best text color
#000000 on #577BBD
4.97:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##577BBD | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##577BBD | 1.00 | 4.22 | 4.97 | 4.97 |
| #FFFFFF | 4.22 | 1.00 | 21.00 | 21.00 |
| #000000 | 4.97 | 21.00 | 1.00 | 1.00 |
| ##000000 | 4.97 | 21.00 | 1.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#6180C0
Deuteranopia (green-blind)
#5477BC
Tritanopia (blue-blind)
#1F8993
Achromatopsia (no color)
#7B7B7B
Design tokens & code
CSS
--color: #577bbd; /* rgb */ color: rgb(87, 123, 189); /* oklch */ color: oklch(58.5% 0.110 261.8);
Tailwind
colors: {
custom: {
50: '#8da0d1',
500: '#577bbd',
950: '#000000',
},
}SCSS
$custom: #577bbd; $custom-light: #8da0d1; $custom-dark: #000000;
JSON
{
"hex": "#577bbd",
"rgb": {
"r": 87,
"g": 123,
"b": 189
},
"hsl": {
"h": 218.824,
"s": 43.59,
"l": 54.118
},
"oklch": {
"l": 0.58549,
"c": 0.10988,
"h": 261.8
},
"luminance": 0.19866
}Semantic roles & 50–950 ramp
primary
#577BBD
secondary
#CEBEA2
accent
#A754D3
background
#F9F9FC
surface
#F1F2F9
border
#CBCCD2
text
#0D0E14
muted
#7E7E82