#1F537F#1F537F
#1F537F is a dark, moderate cyan. Relative luminance 0.080; OKLCH L 43.0% C 0.091 H 247.5°. Best body text is #FFFFFF at 8.07:1 contrast (WCAG AA passes).
Color values
| HEX | #1F537F |
|---|---|
| RGB | rgb(31, 83, 127) |
| HSL | hsl(208, 61%, 31%) |
| HSV | hsv(208, 76%, 50%) |
| CMYK | cmyk(75.6%, 34.6%, 0%, 50.2%) |
| CIE-LAB | lab(34.00, -1.19, -29.76) |
| CIE-LCH | lch(34.00, 29.78, 267.72°) |
| OKLab | oklab(42.99% -0.0349 -0.0844) |
| OKLCH | oklch(42.99% 0.091 247.5) |
| XYZ | xyz(7.4876, 8.0093, 21.2259) |
| Luminance | 0.0801 (WCAG relative) |
| Temperature | cool |
| Family | cyan |
Closest named colors
Light Navy
#155084
ΔE00 1.53
Deep Sea Blue
#015482
ΔE00 2.30
Light Navy Blue
#2E5A88
ΔE00 2.89
Dusk Blue
#26538D
ΔE00 3.06
Prussian Blue
#004577
ΔE00 4.66
Twilight Blue
#0A437A
ΔE00 5.50
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#1F537F #7F4B1F
analogous
#1F7F7B #1F537F #1F237F
triadic
#1F537F #7F1F53 #537F1F
tetradic
#1F537F #7B1F7F #7F4B1F #237F1F
square
#1F537F #7B1F7F #7F4B1F #237F1F
split-complementary
#1F537F #7F1F23 #7F7B1F
monochromatic
#07131D #13334E #1F537F #2B73B0 #4692D2
Accessibility & contrast
On white
8.07
#1F537F on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.60
#1F537F on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #1F537F
8.07:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##1F537F | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##1F537F | 1.00 | 8.07 | 2.60 | 8.07 |
| #FFFFFF | 8.07 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.60 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 8.07 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#3F5581
Deuteranopia (green-blind)
#314C7E
Tritanopia (blue-blind)
#005E63
Achromatopsia (no color)
#505050
Design tokens & code
CSS
--color: #1f537f; /* rgb */ color: rgb(31, 83, 127); /* oklch */ color: oklch(43.0% 0.091 247.5);
Tailwind
colors: {
custom: {
50: '#6883a4',
500: '#1f537f',
950: '#000000',
},
}SCSS
$custom: #1f537f; $custom-light: #6883a4; $custom-dark: #000000;
JSON
{
"hex": "#1f537f",
"rgb": {
"r": 31,
"g": 83,
"b": 127
},
"hsl": {
"h": 207.5,
"s": 60.759,
"l": 30.98
},
"oklch": {
"l": 0.42988,
"c": 0.09138,
"h": 247.5
},
"luminance": 0.0801
}Semantic roles & 50–950 ramp
primary
#1F537F
secondary
#B27848
accent
#8D44E4
background
#F6F7FA
surface
#EBEEF4
border
#C6C9CE
text
#070A0F
muted
#7A7C7F