#1B557A#1B557A
#1B557A is a dark, moderate cyan. Relative luminance 0.081; OKLCH L 43.1% C 0.085 H 241.1°. Best body text is #FFFFFF at 7.99:1 contrast (WCAG AA passes).
Color values
| HEX | #1B557A |
|---|---|
| RGB | rgb(27, 85, 122) |
| HSL | hsl(203, 64%, 29%) |
| HSV | hsv(203, 78%, 48%) |
| CMYK | cmyk(77.9%, 30.3%, 0%, 52.2%) |
| CIE-LAB | lab(34.26, -4.96, -26.27) |
| CIE-LCH | lch(34.26, 26.73, 259.30°) |
| OKLab | oklab(43.07% -0.041 -0.0743) |
| OKLCH | oklch(43.07% 0.085 241.1) |
| XYZ | xyz(7.2120, 8.1343, 19.5986) |
| Luminance | 0.0814 (WCAG relative) |
| Temperature | cool |
| Family | cyan |
Closest named colors
Deep Sea Blue
#015482
ΔE00 1.85
Light Navy
#155084
ΔE00 3.86
Light Navy Blue
#2E5A88
ΔE00 4.33
Dusk Blue
#26538D
ΔE00 5.42
Dark Slate Blue
#214761
ΔE00 5.44
Ugly Blue
#31668A
ΔE00 5.96
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#1B557A #7A401B
analogous
#1B7A70 #1B557A #1B267A
triadic
#1B557A #7A1B55 #557A1B
tetradic
#1B557A #701B7A #7A401B #267A1B
square
#1B557A #701B7A #7A401B #267A1B
split-complementary
#1B557A #7A1B26 #7A701B
monochromatic
#061119 #103248 #1B557A #2678AC #3C99D4
Accessibility & contrast
On white
7.99
#1B557A on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.63
#1B557A on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #1B557A
7.99:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##1B557A | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##1B557A | 1.00 | 7.99 | 2.63 | 7.99 |
| #FFFFFF | 7.99 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.63 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 7.99 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#44567C
Deuteranopia (green-blind)
#374D79
Tritanopia (blue-blind)
#005E62
Achromatopsia (no color)
#515151
Design tokens & code
CSS
--color: #1b557a; /* rgb */ color: rgb(27, 85, 122); /* oklch */ color: oklch(43.1% 0.085 241.1);
Tailwind
colors: {
custom: {
50: '#6684a0',
500: '#1b557a',
950: '#000000',
},
}SCSS
$custom: #1b557a; $custom-light: #6684a0; $custom-dark: #000000;
JSON
{
"hex": "#1b557a",
"rgb": {
"r": 27,
"g": 85,
"b": 122
},
"hsl": {
"h": 203.368,
"s": 63.758,
"l": 29.216
},
"oklch": {
"l": 0.43071,
"c": 0.08486,
"h": 241.1
},
"luminance": 0.08135
}Semantic roles & 50–950 ramp
primary
#1B557A
secondary
#AE6D43
accent
#8241E7
background
#F6F8F9
surface
#EBEFF2
border
#C6CACC
text
#070B0F
muted
#7A7C7E