#577AC7#577AC7
#577AC7 is a mid, vivid blue. Relative luminance 0.201; OKLCH L 58.9% C 0.125 H 264.4°. Best body text is #000000 at 5.01:1 contrast (WCAG AA passes).
Color values
| HEX | #577AC7 |
|---|---|
| RGB | rgb(87, 122, 199) |
| HSL | hsl(221, 50%, 56%) |
| HSV | hsv(221, 56%, 78%) |
| CMYK | cmyk(56.3%, 38.7%, 0%, 22%) |
| CIE-LAB | lab(51.91, 10.48, -43.89) |
| CIE-LCH | lch(51.91, 45.12, 283.43°) |
| OKLab | oklab(58.89% -0.0121 -0.1244) |
| OKLCH | oklch(58.89% 0.125 264.4) |
| XYZ | xyz(21.1953, 20.0672, 56.7782) |
| Luminance | 0.2007 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Cornflower Blue
#5170D7
ΔE00 3.97
Windows Blue
#3778BF
ΔE00 5.48
Off Blue
#5684AE
ΔE00 5.79
Lightish Blue
#3D7AFD
ΔE00 5.93
Deep Sky Blue
#0D75F8
ΔE00 6.17
Clear Blue
#247AFD
ΔE00 6.21
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#577AC7 #C7A457
analogous
#57B2C7 #577AC7 #6C57C7
triadic
#577AC7 #C7577A #7AC757
tetradic
#577AC7 #C757B2 #C7A457 #57C76C
square
#577AC7 #C757B2 #C7A457 #57C76C
split-complementary
#577AC7 #C76C57 #B2C757
monochromatic
#29427B #385BA9 #577AC7 #859ED6 #B3C3E6
Accessibility & contrast
On white
4.19
#577AC7 on #FFFFFF
AA ✗AA large ✓AAA ✗
On black
5.01
#577AC7 on #000000
AA ✓AA large ✓AAA ✗
Best text color
#000000 on #577AC7
5.01:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##577AC7 | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##577AC7 | 1.00 | 4.19 | 5.01 | 5.01 |
| #FFFFFF | 4.19 | 1.00 | 21.00 | 21.00 |
| #000000 | 5.01 | 21.00 | 1.00 | 1.00 |
| ##000000 | 5.01 | 21.00 | 1.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#5A81CA
Deuteranopia (green-blind)
#4C77C5
Tritanopia (blue-blind)
#098B97
Achromatopsia (no color)
#7C7C7C
Design tokens & code
CSS
--color: #577ac7; /* rgb */ color: rgb(87, 122, 199); /* oklch */ color: oklch(58.9% 0.125 264.4);
Tailwind
colors: {
custom: {
50: '#8ea0d8',
500: '#577ac7',
950: '#000000',
},
}SCSS
$custom: #577ac7; $custom-light: #8ea0d8; $custom-dark: #000000;
JSON
{
"hex": "#577ac7",
"rgb": {
"r": 87,
"g": 122,
"b": 199
},
"hsl": {
"h": 221.25,
"s": 50,
"l": 56.078
},
"oklch": {
"l": 0.58892,
"c": 0.125,
"h": 264.4
},
"luminance": 0.20069
}Semantic roles & 50–950 ramp
primary
#577AC7
secondary
#D4C6A6
accent
#AE4EDA
background
#F9F9FD
surface
#F1F2FA
border
#CBCCD3
text
#0D0E14
muted
#7E7E83