#181FA1#181FA1
#181FA1 is a dark, vivid blue. Relative luminance 0.037; OKLCH L 35.4% C 0.199 H 268.5°. Best body text is #FFFFFF at 12.00:1 contrast (WCAG AA passes).
Color values
| HEX | #181FA1 |
|---|---|
| RGB | rgb(24, 31, 161) |
| HSL | hsl(237, 74%, 36%) |
| HSV | hsv(237, 85%, 63%) |
| CMYK | cmyk(85.1%, 80.7%, 0%, 36.9%) |
| CIE-LAB | lab(22.82, 45.21, -68.83) |
| CIE-LCH | lch(22.82, 82.35, 303.30°) |
| OKLab | oklab(35.4% -0.0054 -0.1994) |
| OKLCH | oklch(35.4% 0.199 268.5) |
| XYZ | xyz(7.2975, 3.7465, 34.0498) |
| Luminance | 0.0375 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Royal
#0C1793
ΔE00 2.64
Cobalt Blue
#030AA7
ΔE00 3.32
Royal Blue (survey)
#0504AA
ΔE00 3.87
Indigo Blue
#3A18B1
ΔE00 4.07
Ultramarine
#2000B1
ΔE00 4.34
True Blue
#010FCC
ΔE00 5.49
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#181FA1 #A19A18
analogous
#1864A1 #181FA1 #5618A1
triadic
#181FA1 #A1181F #1FA118
tetradic
#181FA1 #A11864 #A19A18 #18A156
square
#181FA1 #A11864 #A19A18 #18A156
split-complementary
#181FA1 #A15618 #64A118
monochromatic
#080A36 #10156C #181FA1 #2029D6 #4F56E5
Accessibility & contrast
On white
12.00
#181FA1 on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
1.75
#181FA1 on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #181FA1
12.00:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##181FA1 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##181FA1 | 1.00 | 12.00 | 1.75 | 12.00 |
| #FFFFFF | 12.00 | 1.00 | 21.00 | 1.00 |
| #000000 | 1.75 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 12.00 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#003DA5
Deuteranopia (green-blind)
#002F9F
Tritanopia (blue-blind)
#004860
Achromatopsia (no color)
#363636
Design tokens & code
CSS
--color: #181fa1; /* rgb */ color: rgb(24, 31, 161); /* oklch */ color: oklch(35.4% 0.199 268.5);
Tailwind
colors: {
custom: {
50: '#735dbe',
500: '#181fa1',
950: '#000000',
},
}SCSS
$custom: #181fa1; $custom-light: #735dbe; $custom-dark: #000000;
JSON
{
"hex": "#181fa1",
"rgb": {
"r": 24,
"g": 31,
"b": 161
},
"hsl": {
"h": 236.934,
"s": 74.054,
"l": 36.275
},
"oklch": {
"l": 0.35397,
"c": 0.19947,
"h": 268.5
},
"luminance": 0.03747
}Semantic roles & 50–950 ramp
primary
#181FA1
secondary
#C7C14E
accent
#E737F1
background
#F7F5FB
surface
#EEE9F7
border
#C9C5D0
text
#0A0412
muted
#7C7981