#1B576E#1B576E
#1B576E is a dark, moderate cyan. Relative luminance 0.082; OKLCH L 42.9% C 0.071 H 227.7°. Best body text is #FFFFFF at 7.97:1 contrast (WCAG AA passes).
Color values
| HEX | #1B576E |
|---|---|
| RGB | rgb(27, 87, 110) |
| HSL | hsl(197, 61%, 27%) |
| HSV | hsv(197, 75%, 43%) |
| CMYK | cmyk(75.5%, 20.9%, 0%, 56.9%) |
| CIE-LAB | lab(34.34, -10.73, -18.69) |
| CIE-LCH | lch(34.34, 21.54, 240.15°) |
| OKLab | oklab(42.95% -0.0477 -0.0524) |
| OKLCH | oklch(42.95% 0.071 227.7) |
| XYZ | xyz(6.6735, 8.1744, 15.9749) |
| Luminance | 0.0818 (WCAG relative) |
| Temperature | cool |
| Family | cyan |
Closest named colors
Dark Slate Blue
#214761
ΔE00 6.96
Dark Grey Blue
#29465B
ΔE00 7.43
Deep Sea Blue
#015482
ΔE00 7.57
Petrol
#005F6A
ΔE00 7.75
Ugly Blue
#31668A
ΔE00 7.78
Peacock Blue
#016795
ΔE00 8.49
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#1B576E #6E321B
analogous
#1B6E5C #1B576E #1B2D6E
triadic
#1B576E #6E1B57 #576E1B
tetradic
#1B576E #5C1B6E #6E321B #2D6E1B
square
#1B576E #5C1B6E #6E321B #2D6E1B
split-complementary
#1B576E #6E1B2D #6E5C1B
monochromatic
#061319 #0F303D #1B576E #277E9F #36A4CE
Accessibility & contrast
On white
7.97
#1B576E on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.64
#1B576E on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #1B576E
7.97:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##1B576E | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##1B576E | 1.00 | 7.97 | 2.64 | 7.97 |
| #FFFFFF | 7.97 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.64 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 7.97 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#4B556F
Deuteranopia (green-blind)
#404D6E
Tritanopia (blue-blind)
#005E5F
Achromatopsia (no color)
#515151
Design tokens & code
CSS
--color: #1b576e; /* rgb */ color: rgb(27, 87, 110); /* oklch */ color: oklch(42.9% 0.071 227.7);
Tailwind
colors: {
custom: {
50: '#648697',
500: '#1b576e',
950: '#000000',
},
}SCSS
$custom: #1b576e; $custom-light: #648697; $custom-dark: #000000;
JSON
{
"hex": "#1b576e",
"rgb": {
"r": 27,
"g": 87,
"b": 110
},
"hsl": {
"h": 196.627,
"s": 60.584,
"l": 26.863
},
"oklch": {
"l": 0.42948,
"c": 0.07082,
"h": 227.7
},
"luminance": 0.08175
}Semantic roles & 50–950 ramp
primary
#1B576E
secondary
#A35D42
accent
#7044E4
background
#F6F8F9
surface
#EBEFF2
border
#C6CACC
text
#060B0D
muted
#7A7C7E