#183C4B#183C4B
#183C4B is a dark, muted cyan. Relative luminance 0.039; OKLCH L 33.7% C 0.049 H 228.1°. Best body text is #FFFFFF at 11.75:1 contrast (WCAG AA passes).
Color values
| HEX | #183C4B |
|---|---|
| RGB | rgb(24, 60, 75) |
| HSL | hsl(198, 52%, 19%) |
| HSV | hsv(198, 68%, 29%) |
| CMYK | cmyk(68%, 20%, 0%, 70.6%) |
| CIE-LAB | lab(23.45, -7.56, -13.02) |
| CIE-LCH | lch(23.45, 15.05, 239.86°) |
| OKLab | oklab(33.7% -0.0325 -0.0363) |
| OKLCH | oklch(33.7% 0.049 228.1) |
| XYZ | xyz(3.2621, 3.9336, 7.2426) |
| Luminance | 0.0393 (WCAG relative) |
| Temperature | cool |
| Family | cyan |
Closest named colors
Dark Blue Grey
#1F3B4D
ΔE00 3.22
Dark Grey Blue
#29465B
ΔE00 5.42
Dark Slate Blue
#214761
ΔE00 6.24
Charcoal
#36454F
ΔE00 6.32
Gunmetal
#2A3439
ΔE00 7.40
Darkslategray
#2F4F4F
ΔE00 10.22
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#183C4B #4B2718
analogous
#184B41 #183C4B #18234B
triadic
#183C4B #4B183C #3C4B18
tetradic
#183C4B #41184B #4B2718 #234B18
square
#183C4B #41184B #4B2718 #234B18
split-complementary
#183C4B #4B1823 #4B4118
monochromatic
#071317 #09171D #183C4B #276179 #3686A8
Accessibility & contrast
On white
11.75
#183C4B on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
1.79
#183C4B on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #183C4B
11.75:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##183C4B | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##183C4B | 1.00 | 11.75 | 1.79 | 11.75 |
| #FFFFFF | 11.75 | 1.00 | 21.00 | 1.00 |
| #000000 | 1.79 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 11.75 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#343B4C
Deuteranopia (green-blind)
#2D364B
Tritanopia (blue-blind)
#004041
Achromatopsia (no color)
#383838
Design tokens & code
CSS
--color: #183c4b; /* rgb */ color: rgb(24, 60, 75); /* oklch */ color: oklch(33.7% 0.049 228.1);
Tailwind
colors: {
custom: {
50: '#5b717d',
500: '#183c4b',
950: '#000000',
},
}SCSS
$custom: #183c4b; $custom-light: #5b717d; $custom-dark: #000000;
JSON
{
"hex": "#183c4b",
"rgb": {
"r": 24,
"g": 60,
"b": 75
},
"hsl": {
"h": 197.647,
"s": 51.515,
"l": 19.412
},
"oklch": {
"l": 0.33695,
"c": 0.04877,
"h": 228.1
},
"luminance": 0.03934
}Semantic roles & 50–950 ramp
primary
#183C4B
secondary
#82513D
accent
#774DDB
background
#F5F6F7
surface
#E9ECEE
border
#C5C7C9
text
#040709
muted
#797A7B