#577CC1#577CC1
#577CC1 is a mid, moderate blue. Relative luminance 0.203; OKLCH L 59.0% C 0.114 H 262.0°. Best body text is #000000 at 5.06:1 contrast (WCAG AA passes).
Color values
| HEX | #577CC1 |
|---|---|
| RGB | rgb(87, 124, 193) |
| HSL | hsl(219, 46%, 55%) |
| HSV | hsv(219, 55%, 76%) |
| CMYK | cmyk(54.9%, 35.8%, 0%, 24.3%) |
| CIE-LAB | lab(52.16, 7.31, -40.06) |
| CIE-LCH | lch(52.16, 40.72, 280.34°) |
| OKLab | oklab(58.99% -0.0158 -0.1132) |
| OKLCH | oklch(58.99% 0.114 262) |
| XYZ | xyz(20.7605, 20.2902, 53.2641) |
| Luminance | 0.2029 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Cornflower Blue
#5170D7
ΔE00 4.93
Windows Blue
#3778BF
ΔE00 4.99
Off Blue
#5684AE
ΔE00 5.01
Dusty Blue
#5A86AD
ΔE00 5.53
Cool Blue
#4984B8
ΔE00 5.69
Faded Blue
#658CBB
ΔE00 5.69
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#577CC1 #C19C57
analogous
#57B1C1 #577CC1 #6757C1
triadic
#577CC1 #C1577C #7CC157
tetradic
#577CC1 #C157B1 #C19C57 #57C167
square
#577CC1 #C157B1 #C19C57 #57C167
split-complementary
#577CC1 #C16757 #B1C157
monochromatic
#2A4473 #3B5EA0 #577CC1 #849FD1 #B0C2E2
Accessibility & contrast
On white
4.15
#577CC1 on #FFFFFF
AA ✗AA large ✓AAA ✗
On black
5.06
#577CC1 on #000000
AA ✓AA large ✓AAA ✗
Best text color
#000000 on #577CC1
5.06:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##577CC1 | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##577CC1 | 1.00 | 4.15 | 5.06 | 5.06 |
| #FFFFFF | 4.15 | 1.00 | 21.00 | 21.00 |
| #000000 | 5.06 | 21.00 | 1.00 | 1.00 |
| ##000000 | 5.06 | 21.00 | 1.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#6082C4
Deuteranopia (green-blind)
#5378C0
Tritanopia (blue-blind)
#188B95
Achromatopsia (no color)
#7C7C7C
Design tokens & code
CSS
--color: #577cc1; /* rgb */ color: rgb(87, 124, 193); /* oklch */ color: oklch(59.0% 0.114 262.0);
Tailwind
colors: {
custom: {
50: '#8ea1d4',
500: '#577cc1',
950: '#000000',
},
}SCSS
$custom: #577cc1; $custom-light: #8ea1d4; $custom-dark: #000000;
JSON
{
"hex": "#577cc1",
"rgb": {
"r": 87,
"g": 124,
"b": 193
},
"hsl": {
"h": 219.057,
"s": 46.087,
"l": 54.902
},
"oklch": {
"l": 0.58986,
"c": 0.11433,
"h": 262
},
"luminance": 0.20292
}Semantic roles & 50–950 ramp
primary
#577CC1
secondary
#D0C1A4
accent
#A852D6
background
#F9F9FD
surface
#F1F2FA
border
#CBCCD3
text
#0D0E14
muted
#7E7E83