#1B4B68#1B4B68
#1B4B68 is a dark, moderate cyan. Relative luminance 0.063; OKLCH L 39.5% C 0.071 H 238.9°. Best body text is #FFFFFF at 9.32:1 contrast (WCAG AA passes).
Color values
| HEX | #1B4B68 |
|---|---|
| RGB | rgb(27, 75, 104) |
| HSL | hsl(203, 59%, 26%) |
| HSV | hsv(203, 74%, 41%) |
| CMYK | cmyk(74%, 27.9%, 0%, 59.2%) |
| CIE-LAB | lab(30.07, -5.58, -21.55) |
| CIE-LCH | lch(30.07, 22.26, 255.48°) |
| OKLab | oklab(39.45% -0.0366 -0.0607) |
| OKLCH | oklch(39.45% 0.071 238.9) |
| XYZ | xyz(5.4658, 6.2640, 14.0150) |
| Luminance | 0.0626 (WCAG relative) |
| Temperature | cool |
| Family | cyan |
Closest named colors
Dark Slate Blue
#214761
ΔE00 1.82
Dark Grey Blue
#29465B
ΔE00 3.46
Deep Sea Blue
#015482
ΔE00 4.86
Prussian Blue
#004577
ΔE00 5.30
Light Navy
#155084
ΔE00 5.58
Dark Blue Grey
#1F3B4D
ΔE00 6.28
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#1B4B68 #68381B
analogous
#1B685E #1B4B68 #1B2468
triadic
#1B4B68 #681B4B #4B681B
tetradic
#1B4B68 #5E1B68 #68381B #24681B
square
#1B4B68 #5E1B68 #68381B #24681B
split-complementary
#1B4B68 #681B24 #685E1B
monochromatic
#061218 #0E2837 #1B4B68 #286E99 #3491C9
Accessibility & contrast
On white
9.32
#1B4B68 on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.25
#1B4B68 on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #1B4B68
9.32:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##1B4B68 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##1B4B68 | 1.00 | 9.32 | 2.25 | 9.32 |
| #FFFFFF | 9.32 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.25 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 9.32 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#3D4B69
Deuteranopia (green-blind)
#334367
Tritanopia (blue-blind)
#005255
Achromatopsia (no color)
#474747
Design tokens & code
CSS
--color: #1b4b68; /* rgb */ color: rgb(27, 75, 104); /* oklch */ color: oklch(39.5% 0.071 238.9);
Tailwind
colors: {
custom: {
50: '#627d93',
500: '#1b4b68',
950: '#000000',
},
}SCSS
$custom: #1b4b68; $custom-light: #627d93; $custom-dark: #000000;
JSON
{
"hex": "#1b4b68",
"rgb": {
"r": 27,
"g": 75,
"b": 104
},
"hsl": {
"h": 202.597,
"s": 58.779,
"l": 25.686
},
"oklch": {
"l": 0.3945,
"c": 0.07094,
"h": 238.9
},
"luminance": 0.06265
}Semantic roles & 50–950 ramp
primary
#1B4B68
secondary
#9D6442
accent
#8146E2
background
#F6F7F9
surface
#EBEEF1
border
#C6C9CB
text
#06090D
muted
#7A7B7E