#183E5C#183E5C
#183E5C is a dark, moderate cyan. Relative luminance 0.044; OKLCH L 35.2% C 0.068 H 245.4°. Best body text is #FFFFFF at 11.16:1 contrast (WCAG AA passes).
Color values
| HEX | #183E5C |
|---|---|
| RGB | rgb(24, 62, 92) |
| HSL | hsl(206, 59%, 23%) |
| HSV | hsv(206, 74%, 36%) |
| CMYK | cmyk(73.9%, 32.6%, 0%, 63.9%) |
| CIE-LAB | lab(24.99, -2.32, -21.80) |
| CIE-LCH | lch(24.99, 21.93, 263.93°) |
| OKLab | oklab(35.2% -0.0283 -0.0616) |
| OKLCH | oklch(35.2% 0.068 245.4) |
| XYZ | xyz(4.0303, 4.4117, 10.7623) |
| Luminance | 0.0441 (WCAG relative) |
| Temperature | cool |
| Family | cyan |
Closest named colors
Dark Slate Blue
#214761
ΔE00 3.55
Dark Grey Blue
#29465B
ΔE00 4.32
Marine Blue
#01386A
ΔE00 4.50
Prussian Blue
#004577
ΔE00 4.59
Dark Blue Grey
#1F3B4D
ΔE00 4.70
Twilight Blue
#0A437A
ΔE00 4.94
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#183E5C #5C3618
analogous
#185C58 #183E5C #181C5C
triadic
#183E5C #5C183E #3E5C18
tetradic
#183E5C #58185C #5C3618 #1C5C18
square
#183E5C #58185C #5C3618 #1C5C18
split-complementary
#183E5C #5C181C #5C5818
monochromatic
#061018 #0B1D2B #183E5C #255F8D #317FBD
Accessibility & contrast
On white
11.16
#183E5C on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
1.88
#183E5C on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #183E5C
11.16:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##183E5C | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##183E5C | 1.00 | 11.16 | 1.88 | 11.16 |
| #FFFFFF | 11.16 | 1.00 | 21.00 | 1.00 |
| #000000 | 1.88 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 11.16 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#313F5D
Deuteranopia (green-blind)
#27385B
Tritanopia (blue-blind)
#004549
Achromatopsia (no color)
#3B3B3B
Design tokens & code
CSS
--color: #183e5c; /* rgb */ color: rgb(24, 62, 92); /* oklch */ color: oklch(35.2% 0.068 245.4);
Tailwind
colors: {
custom: {
50: '#5e738a',
500: '#183e5c',
950: '#000000',
},
}SCSS
$custom: #183e5c; $custom-light: #5e738a; $custom-dark: #000000;
JSON
{
"hex": "#183e5c",
"rgb": {
"r": 24,
"g": 62,
"b": 92
},
"hsl": {
"h": 206.471,
"s": 58.621,
"l": 22.745
},
"oklch": {
"l": 0.35195,
"c": 0.06782,
"h": 245.4
},
"luminance": 0.04412
}Semantic roles & 50–950 ramp
primary
#183E5C
secondary
#93633D
accent
#8B46E2
background
#F5F6F8
surface
#EAECF0
border
#C6C7CB
text
#05080B
muted
#797B7C