#1F5571#1F5571
#1F5571 is a dark, moderate cyan. Relative luminance 0.080; OKLCH L 42.7% C 0.073 H 234.9°. Best body text is #FFFFFF at 8.09:1 contrast (WCAG AA passes).
Color values
| HEX | #1F5571 |
|---|---|
| RGB | rgb(31, 85, 113) |
| HSL | hsl(200, 57%, 28%) |
| HSV | hsv(200, 73%, 44%) |
| CMYK | cmyk(72.6%, 24.8%, 0%, 55.7%) |
| CIE-LAB | lab(33.94, -7.77, -21.17) |
| CIE-LCH | lch(33.94, 22.55, 249.86°) |
| OKLab | oklab(42.71% -0.0419 -0.0595) |
| OKLCH | oklch(42.71% 0.073 234.9) |
| XYZ | xyz(6.7930, 7.9798, 16.8018) |
| Luminance | 0.0798 (WCAG relative) |
| Temperature | cool |
| Family | cyan |
Closest named colors
Deep Sea Blue
#015482
ΔE00 4.75
Dark Slate Blue
#214761
ΔE00 5.10
Dark Grey Blue
#29465B
ΔE00 5.99
Ugly Blue
#31668A
ΔE00 6.60
Light Navy
#155084
ΔE00 6.69
Light Navy Blue
#2E5A88
ΔE00 6.87
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#1F5571 #713B1F
analogous
#1F7164 #1F5571 #1F2C71
triadic
#1F5571 #711F55 #55711F
tetradic
#1F5571 #641F71 #713B1F #2C711F
square
#1F5571 #641F71 #713B1F #2C711F
split-complementary
#1F5571 #711F2C #71641F
monochromatic
#071218 #123141 #1F5571 #2C79A1 #409BCB
Accessibility & contrast
On white
8.09
#1F5571 on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.60
#1F5571 on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #1F5571
8.09:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##1F5571 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##1F5571 | 1.00 | 8.09 | 2.60 | 8.09 |
| #FFFFFF | 8.09 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.60 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 8.09 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#475472
Deuteranopia (green-blind)
#3C4C71
Tritanopia (blue-blind)
#005C5E
Achromatopsia (no color)
#505050
Design tokens & code
CSS
--color: #1f5571; /* rgb */ color: rgb(31, 85, 113); /* oklch */ color: oklch(42.7% 0.073 234.9);
Tailwind
colors: {
custom: {
50: '#66849a',
500: '#1f5571',
950: '#000000',
},
}SCSS
$custom: #1f5571; $custom-light: #66849a; $custom-dark: #000000;
JSON
{
"hex": "#1f5571",
"rgb": {
"r": 31,
"g": 85,
"b": 113
},
"hsl": {
"h": 200.488,
"s": 56.944,
"l": 28.235
},
"oklch": {
"l": 0.42706,
"c": 0.07277,
"h": 234.9
},
"luminance": 0.07981
}Semantic roles & 50–950 ramp
primary
#1F5571
secondary
#A56747
accent
#7C48E0
background
#F6F8F9
surface
#EBEFF2
border
#C6CACC
text
#060B0E
muted
#7A7C7E