#1B556B#1B556B
#1B556B is a dark, moderate cyan. Relative luminance 0.078; OKLCH L 42.3% C 0.069 H 227.3°. Best body text is #FFFFFF at 8.21:1 contrast (WCAG AA passes).
Color values
| HEX | #1B556B |
|---|---|
| RGB | rgb(27, 85, 107) |
| HSL | hsl(197, 60%, 26%) |
| HSV | hsv(197, 75%, 42%) |
| CMYK | cmyk(74.8%, 20.6%, 0%, 58%) |
| CIE-LAB | lab(33.54, -10.63, -18.05) |
| CIE-LCH | lch(33.54, 20.95, 239.50°) |
| OKLab | oklab(42.26% -0.0467 -0.0506) |
| OKLCH | oklch(42.26% 0.069 227.3) |
| XYZ | xyz(6.3533, 7.7908, 15.0760) |
| Luminance | 0.0779 (WCAG relative) |
| Temperature | cool |
| Family | cyan |
Closest named colors
Dark Slate Blue
#214761
ΔE00 6.59
Dark Grey Blue
#29465B
ΔE00 6.98
Petrol
#005F6A
ΔE00 7.80
Deep Sea Blue
#015482
ΔE00 7.82
Ugly Blue
#31668A
ΔE00 8.42
Peacock Blue
#016795
ΔE00 9.16
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#1B556B #6B311B
analogous
#1B6B59 #1B556B #1B2D6B
triadic
#1B556B #6B1B55 #556B1B
tetradic
#1B556B #591B6B #6B311B #2D6B1B
square
#1B556B #591B6B #6B311B #2D6B1B
split-complementary
#1B556B #6B1B2D #6B591B
monochromatic
#061318 #0F2E3A #1B556B #277C9C #35A2CC
Accessibility & contrast
On white
8.21
#1B556B on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.56
#1B556B on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #1B556B
8.21:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##1B556B | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##1B556B | 1.00 | 8.21 | 2.56 | 8.21 |
| #FFFFFF | 8.21 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.56 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 8.21 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#49536C
Deuteranopia (green-blind)
#3E4B6B
Tritanopia (blue-blind)
#005B5C
Achromatopsia (no color)
#4F4F4F
Design tokens & code
CSS
--color: #1b556b; /* rgb */ color: rgb(27, 85, 107); /* oklch */ color: oklch(42.3% 0.069 227.3);
Tailwind
colors: {
custom: {
50: '#638595',
500: '#1b556b',
950: '#000000',
},
}SCSS
$custom: #1b556b; $custom-light: #638595; $custom-dark: #000000;
JSON
{
"hex": "#1b556b",
"rgb": {
"r": 27,
"g": 85,
"b": 107
},
"hsl": {
"h": 196.5,
"s": 59.701,
"l": 26.275
},
"oklch": {
"l": 0.42264,
"c": 0.06882,
"h": 227.3
},
"luminance": 0.07792
}Semantic roles & 50–950 ramp
primary
#1B556B
secondary
#A05C42
accent
#7045E3
background
#F6F8F9
surface
#EBEFF1
border
#C6CACB
text
#060B0D
muted
#7A7C7E