#1F536B#1F536B
#1F536B is a dark, moderate cyan. Relative luminance 0.075; OKLCH L 41.9% C 0.068 H 231.6°. Best body text is #FFFFFF at 8.37:1 contrast (WCAG AA passes).
Color values
| HEX | #1F536B |
|---|---|
| RGB | rgb(31, 83, 107) |
| HSL | hsl(199, 55%, 27%) |
| HSV | hsv(199, 71%, 42%) |
| CMYK | cmyk(71%, 22.4%, 0%, 58%) |
| CIE-LAB | lab(33.00, -8.75, -18.87) |
| CIE-LCH | lch(33.00, 20.80, 245.12°) |
| OKLab | oklab(41.87% -0.042 -0.0529) |
| OKLCH | oklch(41.87% 0.068 231.6) |
| XYZ | xyz(6.3111, 7.5387, 15.0296) |
| Luminance | 0.0754 (WCAG relative) |
| Temperature | cool |
| Family | cyan |
Closest named colors
Dark Slate Blue
#214761
ΔE00 5.08
Dark Grey Blue
#29465B
ΔE00 5.62
Deep Sea Blue
#015482
ΔE00 6.37
Ugly Blue
#31668A
ΔE00 7.94
Light Navy
#155084
ΔE00 8.18
Dark Blue Grey
#1F3B4D
ΔE00 8.38
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#1F536B #6B371F
analogous
#1F6B5D #1F536B #1F2D6B
triadic
#1F536B #6B1F53 #536B1F
tetradic
#1F536B #5D1F6B #6B371F #2D6B1F
square
#1F536B #5D1F6B #6B371F #2D6B1F
split-complementary
#1F536B #6B1F2D #6B5D1F
monochromatic
#071218 #112E3C #1F536B #2D789A #3D9CC7
Accessibility & contrast
On white
8.37
#1F536B on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.51
#1F536B on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #1F536B
8.37:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##1F536B | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##1F536B | 1.00 | 8.37 | 2.51 | 8.37 |
| #FFFFFF | 8.37 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.51 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 8.37 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#47526C
Deuteranopia (green-blind)
#3D4A6B
Tritanopia (blue-blind)
#005A5B
Achromatopsia (no color)
#4E4E4E
Design tokens & code
CSS
--color: #1f536b; /* rgb */ color: rgb(31, 83, 107); /* oklch */ color: oklch(41.9% 0.068 231.6);
Tailwind
colors: {
custom: {
50: '#658395',
500: '#1f536b',
950: '#000000',
},
}SCSS
$custom: #1f536b; $custom-light: #658395; $custom-dark: #000000;
JSON
{
"hex": "#1f536b",
"rgb": {
"r": 31,
"g": 83,
"b": 107
},
"hsl": {
"h": 198.947,
"s": 55.072,
"l": 27.059
},
"oklch": {
"l": 0.41868,
"c": 0.06753,
"h": 231.6
},
"luminance": 0.07539
}Semantic roles & 50–950 ramp
primary
#1F536B
secondary
#9F6347
accent
#7849DE
background
#F6F8F9
surface
#EBEFF1
border
#C6CACB
text
#060A0D
muted
#7A7C7E