#1B4F63#1B4F63
#1B4F63 is a dark, moderate cyan. Relative luminance 0.067; OKLCH L 40.3% C 0.064 H 227.2°. Best body text is #FFFFFF at 8.95:1 contrast (WCAG AA passes).
Color values
| HEX | #1B4F63 |
|---|---|
| RGB | rgb(27, 79, 99) |
| HSL | hsl(197, 57%, 25%) |
| HSV | hsv(197, 73%, 39%) |
| CMYK | cmyk(72.7%, 20.2%, 0%, 61.2%) |
| CIE-LAB | lab(31.17, -9.95, -16.67) |
| CIE-LCH | lch(31.17, 19.41, 239.17°) |
| OKLab | oklab(40.25% -0.0432 -0.0466) |
| OKLCH | oklch(40.25% 0.064 227.2) |
| XYZ | xyz(5.4992, 6.7252, 12.8102) |
| Luminance | 0.0673 (WCAG relative) |
| Temperature | cool |
| Family | cyan |
Closest named colors
Dark Slate Blue
#214761
ΔE00 5.52
Dark Grey Blue
#29465B
ΔE00 5.66
Dark Blue Grey
#1F3B4D
ΔE00 7.55
Charcoal
#36454F
ΔE00 8.02
Deep Sea Blue
#015482
ΔE00 8.44
Petrol
#005F6A
ΔE00 8.68
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#1B4F63 #632F1B
analogous
#1B6353 #1B4F63 #1B2B63
triadic
#1B4F63 #631B4F #4F631B
tetradic
#1B4F63 #531B63 #632F1B #2B631B
square
#1B4F63 #531B63 #632F1B #2B631B
split-complementary
#1B4F63 #631B2B #63531B
monochromatic
#071318 #0E2933 #1B4F63 #287593 #359CC3
Accessibility & contrast
On white
8.95
#1B4F63 on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.35
#1B4F63 on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #1B4F63
8.95:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##1B4F63 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##1B4F63 | 1.00 | 8.95 | 2.35 | 8.95 |
| #FFFFFF | 8.95 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.35 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 8.95 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#444D64
Deuteranopia (green-blind)
#3A4663
Tritanopia (blue-blind)
#005556
Achromatopsia (no color)
#494949
Design tokens & code
CSS
--color: #1b4f63; /* rgb */ color: rgb(27, 79, 99); /* oklch */ color: oklch(40.3% 0.064 227.2);
Tailwind
colors: {
custom: {
50: '#62808f',
500: '#1b4f63',
950: '#000000',
},
}SCSS
$custom: #1b4f63; $custom-light: #62808f; $custom-dark: #000000;
JSON
{
"hex": "#1b4f63",
"rgb": {
"r": 27,
"g": 79,
"b": 99
},
"hsl": {
"h": 196.667,
"s": 57.143,
"l": 24.706
},
"oklch": {
"l": 0.40251,
"c": 0.06357,
"h": 227.2
},
"luminance": 0.06726
}Semantic roles & 50–950 ramp
primary
#1B4F63
secondary
#985A41
accent
#7247E0
background
#F6F7F8
surface
#EBEEF0
border
#C6C9CB
text
#050A0C
muted
#7A7C7D