#577AC4#577AC4
#577AC4 is a mid, vivid blue. Relative luminance 0.199; OKLCH L 58.7% C 0.121 H 263.9°. Best body text is #000000 at 4.99:1 contrast (WCAG AA passes).
Color values
| HEX | #577AC4 |
|---|---|
| RGB | rgb(87, 122, 196) |
| HSL | hsl(221, 48%, 55%) |
| HSV | hsv(221, 56%, 77%) |
| CMYK | cmyk(55.6%, 37.8%, 0%, 23.1%) |
| CIE-LAB | lab(51.76, 9.50, -42.42) |
| CIE-LCH | lch(51.76, 43.47, 282.62°) |
| OKLab | oklab(58.72% -0.0128 -0.1201) |
| OKLCH | oklch(58.72% 0.121 263.9) |
| XYZ | xyz(20.8504, 19.9292, 54.9618) |
| Luminance | 0.1993 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Cornflower Blue
#5170D7
ΔE00 4.16
Windows Blue
#3778BF
ΔE00 5.32
Off Blue
#5684AE
ΔE00 5.67
Dusty Blue
#5A86AD
ΔE00 6.17
Lightish Blue
#3D7AFD
ΔE00 6.22
Deep Sky Blue
#0D75F8
ΔE00 6.35
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#577AC4 #C4A157
analogous
#57B0C4 #577AC4 #6A57C4
triadic
#577AC4 #C4577A #7AC457
tetradic
#577AC4 #C457B0 #C4A157 #57C46A
square
#577AC4 #C457B0 #C4A157 #57C46A
split-complementary
#577AC4 #C46A57 #B0C457
monochromatic
#2A4377 #3A5CA4 #577AC4 #849ED4 #B2C2E4
Accessibility & contrast
On white
4.21
#577AC4 on #FFFFFF
AA ✗AA large ✓AAA ✗
On black
4.99
#577AC4 on #000000
AA ✓AA large ✓AAA ✗
Best text color
#000000 on #577AC4
4.99:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##577AC4 | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##577AC4 | 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)
#5C81C7
Deuteranopia (green-blind)
#4E77C2
Tritanopia (blue-blind)
#128A95
Achromatopsia (no color)
#7B7B7B
Design tokens & code
CSS
--color: #577ac4; /* rgb */ color: rgb(87, 122, 196); /* oklch */ color: oklch(58.7% 0.121 263.9);
Tailwind
colors: {
custom: {
50: '#8ea0d6',
500: '#577ac4',
950: '#000000',
},
}SCSS
$custom: #577ac4; $custom-light: #8ea0d6; $custom-dark: #000000;
JSON
{
"hex": "#577ac4",
"rgb": {
"r": 87,
"g": 122,
"b": 196
},
"hsl": {
"h": 220.734,
"s": 48.018,
"l": 55.49
},
"oklch": {
"l": 0.58721,
"c": 0.12081,
"h": 263.9
},
"luminance": 0.19931
}Semantic roles & 50–950 ramp
primary
#577AC4
secondary
#D2C4A5
accent
#AC50D8
background
#F9F9FD
surface
#F1F2FA
border
#CBCCD3
text
#0D0E14
muted
#7E7E83