#183A4D#183A4D
#183A4D is a dark, muted cyan. Relative luminance 0.038; OKLCH L 33.2% C 0.052 H 235.8°. Best body text is #FFFFFF at 11.99:1 contrast (WCAG AA passes).
Color values
| HEX | #183A4D |
|---|---|
| RGB | rgb(24, 58, 77) |
| HSL | hsl(202, 52%, 20%) |
| HSV | hsv(202, 69%, 30%) |
| CMYK | cmyk(68.8%, 24.7%, 0%, 69.8%) |
| CIE-LAB | lab(22.85, -5.51, -15.28) |
| CIE-LCH | lch(22.85, 16.24, 250.16°) |
| OKLab | oklab(33.25% -0.0291 -0.0428) |
| OKLCH | oklch(33.25% 0.052 235.8) |
| XYZ | xyz(3.2288, 3.7558, 7.5745) |
| Luminance | 0.0376 (WCAG relative) |
| Temperature | cool |
| Family | cyan |
Closest named colors
Dark Blue Grey
#1F3B4D
ΔE00 1.21
Dark Grey Blue
#29465B
ΔE00 4.34
Dark Slate Blue
#214761
ΔE00 4.93
Charcoal
#36454F
ΔE00 6.47
Gunmetal
#2A3439
ΔE00 7.66
Marine Blue
#01386A
ΔE00 8.68
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#183A4D #4D2B18
analogous
#184D45 #183A4D #18204D
triadic
#183A4D #4D183A #3A4D18
tetradic
#183A4D #45184D #4D2B18 #204D18
square
#183A4D #45184D #4D2B18 #204D18
split-complementary
#183A4D #4D1820 #4D4518
monochromatic
#071217 #09171E #183A4D #275D7C #3580AA
Accessibility & contrast
On white
11.99
#183A4D on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
1.75
#183A4D on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #183A4D
11.99:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##183A4D | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##183A4D | 1.00 | 11.99 | 1.75 | 11.99 |
| #FFFFFF | 11.99 | 1.00 | 21.00 | 1.00 |
| #000000 | 1.75 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 11.99 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#313A4E
Deuteranopia (green-blind)
#2A344D
Tritanopia (blue-blind)
#003F40
Achromatopsia (no color)
#373737
Design tokens & code
CSS
--color: #183a4d; /* rgb */ color: rgb(24, 58, 77); /* oklch */ color: oklch(33.2% 0.052 235.8);
Tailwind
colors: {
custom: {
50: '#5b707f',
500: '#183a4d',
950: '#000000',
},
}SCSS
$custom: #183a4d; $custom-light: #5b707f; $custom-dark: #000000;
JSON
{
"hex": "#183a4d",
"rgb": {
"r": 24,
"g": 58,
"b": 77
},
"hsl": {
"h": 201.509,
"s": 52.475,
"l": 19.804
},
"oklch": {
"l": 0.33246,
"c": 0.05179,
"h": 235.8
},
"luminance": 0.03756
}Semantic roles & 50–950 ramp
primary
#183A4D
secondary
#84563D
accent
#804CDC
background
#F5F6F7
surface
#E9ECEE
border
#C5C7C9
text
#04070A
muted
#797A7C