#557CBB#557CBB
#557CBB is a mid, moderate blue. Relative luminance 0.199; OKLCH L 58.5% C 0.107 H 259.6°. Best body text is #000000 at 4.99:1 contrast (WCAG AA passes).
Color values
| HEX | #557CBB |
|---|---|
| RGB | rgb(85, 124, 187) |
| HSL | hsl(217, 43%, 53%) |
| HSV | hsv(217, 55%, 73%) |
| CMYK | cmyk(54.5%, 33.7%, 0%, 26.7%) |
| CIE-LAB | lab(51.76, 4.93, -37.27) |
| CIE-LCH | lch(51.76, 37.59, 277.53°) |
| OKLab | oklab(58.55% -0.0192 -0.1051) |
| OKLCH | oklch(58.55% 0.107 259.6) |
| XYZ | xyz(19.9205, 19.9329, 49.8018) |
| Luminance | 0.1993 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Windows Blue
#3778BF
ΔE00 4.31
Off Blue
#5684AE
ΔE00 4.50
Cool Blue
#4984B8
ΔE00 5.08
Dusty Blue
#5A86AD
ΔE00 5.14
Steel Blue
#4682B4
ΔE00 5.23
Cornflower Blue
#5170D7
ΔE00 5.39
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#557CBB #BB9455
analogous
#55AFBB #557CBB #6155BB
triadic
#557CBB #BB557C #7CBB55
tetradic
#557CBB #BB55AF #BB9455 #55BB61
square
#557CBB #BB55AF #BB9455 #55BB61
split-complementary
#557CBB #BB6155 #AFBB55
monochromatic
#2B436B #3C5F97 #557CBB #819ECC #ACBFDE
Accessibility & contrast
On white
4.21
#557CBB on #FFFFFF
AA ✗AA large ✓AAA ✗
On black
4.99
#557CBB on #000000
AA ✓AA large ✓AAA ✗
Best text color
#000000 on #557CBB
4.99:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##557CBB | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##557CBB | 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)
#6381BE
Deuteranopia (green-blind)
#5677BA
Tritanopia (blue-blind)
#198A93
Achromatopsia (no color)
#7B7B7B
Design tokens & code
CSS
--color: #557cbb; /* rgb */ color: rgb(85, 124, 187); /* oklch */ color: oklch(58.5% 0.107 259.6);
Tailwind
colors: {
custom: {
50: '#8ca1d0',
500: '#557cbb',
950: '#000000',
},
}SCSS
$custom: #557cbb; $custom-light: #8ca1d0; $custom-dark: #000000;
JSON
{
"hex": "#557cbb",
"rgb": {
"r": 85,
"g": 124,
"b": 187
},
"hsl": {
"h": 217.059,
"s": 42.857,
"l": 53.333
},
"oklch": {
"l": 0.58548,
"c": 0.10686,
"h": 259.6
},
"luminance": 0.19934
}Semantic roles & 50–950 ramp
primary
#557CBB
secondary
#CCBBA0
accent
#A355D3
background
#F8F9FC
surface
#F0F2F9
border
#CBCCD2
text
#0D0E14
muted
#7D7E82