#1F406B#1F406B
#1F406B is a dark, moderate cyan. Relative luminance 0.050; OKLCH L 37.0% C 0.084 H 255.9°. Best body text is #FFFFFF at 10.48:1 contrast (WCAG AA passes).
Color values
| HEX | #1F406B |
|---|---|
| RGB | rgb(31, 64, 107) |
| HSL | hsl(214, 55%, 27%) |
| HSV | hsv(214, 71%, 42%) |
| CMYK | cmyk(71%, 40.2%, 0%, 58%) |
| CIE-LAB | lab(26.79, 3.55, -28.62) |
| CIE-LCH | lch(26.79, 28.83, 277.07°) |
| OKLab | oklab(36.97% -0.0204 -0.0814) |
| OKLCH | oklch(36.97% 0.084 255.9) |
| XYZ | xyz(5.0513, 5.0191, 14.6096) |
| Luminance | 0.0502 (WCAG relative) |
| Temperature | cool |
| Family | cyan |
Closest named colors
Twilight Blue
#0A437A
ΔE00 2.90
Marine Blue
#01386A
ΔE00 3.07
Darkish Blue
#014182
ΔE00 3.50
Prussian Blue
#004577
ΔE00 3.89
Cobalt (survey)
#1E488F
ΔE00 5.20
Marine
#042E60
ΔE00 5.70
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#1F406B #6B4A1F
analogous
#1F666B #1F406B #241F6B
triadic
#1F406B #6B1F40 #406B1F
tetradic
#1F406B #6B1F66 #6B4A1F #1F6B24
square
#1F406B #6B1F66 #6B4A1F #1F6B24
split-complementary
#1F406B #6B241F #666B1F
monochromatic
#070E18 #11243C #1F406B #2D5C9A #3D79C7
Accessibility & contrast
On white
10.48
#1F406B on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.00
#1F406B on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #1F406B
10.48:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##1F406B | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##1F406B | 1.00 | 10.48 | 2.00 | 10.48 |
| #FFFFFF | 10.48 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.00 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 10.48 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#2D436D
Deuteranopia (green-blind)
#223C6A
Tritanopia (blue-blind)
#004A50
Achromatopsia (no color)
#3F3F3F
Design tokens & code
CSS
--color: #1f406b; /* rgb */ color: rgb(31, 64, 107); /* oklch */ color: oklch(37.0% 0.084 255.9);
Tailwind
colors: {
custom: {
50: '#647495',
500: '#1f406b',
950: '#000000',
},
}SCSS
$custom: #1f406b; $custom-light: #647495; $custom-dark: #000000;
JSON
{
"hex": "#1f406b",
"rgb": {
"r": 31,
"g": 64,
"b": 107
},
"hsl": {
"h": 213.947,
"s": 55.072,
"l": 27.059
},
"oklch": {
"l": 0.36967,
"c": 0.08392,
"h": 255.9
},
"luminance": 0.0502
}Semantic roles & 50–950 ramp
primary
#1F406B
secondary
#9F7947
accent
#9E49DE
background
#F6F7F9
surface
#EBEDF2
border
#C6C8CC
text
#06080D
muted
#7A7B7E