#171DA0#171DA0
#171DA0 is a dark, highly saturated blue. Relative luminance 0.036; OKLCH L 35.0% C 0.200 H 268.4°. Best body text is #FFFFFF at 12.21:1 contrast (WCAG AA passes).
Color values
| HEX | #171DA0 |
|---|---|
| RGB | rgb(23, 29, 160) |
| HSL | hsl(237, 75%, 36%) |
| HSV | hsv(237, 86%, 63%) |
| CMYK | cmyk(85.6%, 81.9%, 0%, 37.3%) |
| CIE-LAB | lab(22.30, 45.86, -69.08) |
| CIE-LCH | lch(22.30, 82.92, 303.58°) |
| OKLab | oklab(34.99% -0.0057 -0.2001) |
| OKLCH | oklch(34.99% 0.2 268.4) |
| XYZ | xyz(7.1357, 3.5981, 33.5693) |
| Luminance | 0.0360 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Royal
#0C1793
ΔE00 2.28
Cobalt Blue
#030AA7
ΔE00 2.95
Royal Blue (survey)
#0504AA
ΔE00 3.52
Ultramarine
#2000B1
ΔE00 4.08
Indigo Blue
#3A18B1
ΔE00 4.10
True Blue
#010FCC
ΔE00 5.53
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#171DA0 #A09A17
analogous
#1761A0 #171DA0 #5517A0
triadic
#171DA0 #A0171D #1DA017
tetradic
#171DA0 #A01761 #A09A17 #17A055
square
#171DA0 #A01761 #A09A17 #17A055
split-complementary
#171DA0 #A05517 #61A017
monochromatic
#080A35 #0F136A #171DA0 #1F27D6 #4C53E5
Accessibility & contrast
On white
12.21
#171DA0 on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
1.72
#171DA0 on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #171DA0
12.21:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##171DA0 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##171DA0 | 1.00 | 12.21 | 1.72 | 12.21 |
| #FFFFFF | 12.21 | 1.00 | 21.00 | 1.00 |
| #000000 | 1.72 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 12.21 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#003CA4
Deuteranopia (green-blind)
#002E9E
Tritanopia (blue-blind)
#00475F
Achromatopsia (no color)
#353535
Design tokens & code
CSS
--color: #171da0; /* rgb */ color: rgb(23, 29, 160); /* oklch */ color: oklch(35.0% 0.200 268.4);
Tailwind
colors: {
custom: {
50: '#725cbe',
500: '#171da0',
950: '#000000',
},
}SCSS
$custom: #171da0; $custom-light: #725cbe; $custom-dark: #000000;
JSON
{
"hex": "#171da0",
"rgb": {
"r": 23,
"g": 29,
"b": 160
},
"hsl": {
"h": 237.372,
"s": 74.863,
"l": 35.882
},
"oklch": {
"l": 0.34987,
"c": 0.20019,
"h": 268.4
},
"luminance": 0.03599
}Semantic roles & 50–950 ramp
primary
#171DA0
secondary
#C7C24C
accent
#E936F1
background
#F7F5FB
surface
#EEE9F7
border
#C9C5D0
text
#0A0412
muted
#7C7981