#1F1CA1#1F1CA1
#1F1CA1 is a dark, highly saturated blue. Relative luminance 0.037; OKLCH L 35.4% C 0.200 H 270.7°. Best body text is #FFFFFF at 12.08:1 contrast (WCAG AA passes).
Color values
| HEX | #1F1CA1 |
|---|---|
| RGB | rgb(31, 28, 161) |
| HSL | hsl(241, 70%, 37%) |
| HSV | hsv(241, 83%, 63%) |
| CMYK | cmyk(80.7%, 82.6%, 0%, 36.9%) |
| CIE-LAB | lab(22.63, 47.09, -69.12) |
| CIE-LCH | lch(22.63, 83.64, 304.26°) |
| OKLab | oklab(35.36% 0.0025 -0.2001) |
| OKLCH | oklch(35.36% 0.2 270.7) |
| XYZ | xyz(7.4112, 3.6942, 34.0338) |
| Luminance | 0.0369 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Royal
#0C1793
ΔE00 2.54
Cobalt Blue
#030AA7
ΔE00 2.80
Royal Blue (survey)
#0504AA
ΔE00 3.32
Indigo Blue
#3A18B1
ΔE00 3.54
Ultramarine
#2000B1
ΔE00 3.69
True Blue
#010FCC
ΔE00 5.29
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#1F1CA1 #9EA11C
analogous
#1C5CA1 #1F1CA1 #611CA1
triadic
#1F1CA1 #A11F1C #1CA11F
tetradic
#1F1CA1 #A11C5C #9EA11C #1CA161
square
#1F1CA1 #A11C5C #9EA11C #1CA161
split-complementary
#1F1CA1 #A1611C #5CA11C
monochromatic
#0B0A39 #15136D #1F1CA1 #2925D5 #5956E2
Accessibility & contrast
On white
12.08
#1F1CA1 on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
1.74
#1F1CA1 on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #1F1CA1
12.08:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##1F1CA1 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##1F1CA1 | 1.00 | 12.08 | 1.74 | 12.08 |
| #FFFFFF | 12.08 | 1.00 | 21.00 | 1.00 |
| #000000 | 1.74 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 12.08 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#003DA5
Deuteranopia (green-blind)
#002F9F
Tritanopia (blue-blind)
#004760
Achromatopsia (no color)
#363636
Design tokens & code
CSS
--color: #1f1ca1; /* rgb */ color: rgb(31, 28, 161); /* oklch */ color: oklch(35.4% 0.200 270.7);
Tailwind
colors: {
custom: {
50: '#755cbe',
500: '#1f1ca1',
950: '#000000',
},
}SCSS
$custom: #1f1ca1; $custom-light: #755cbe; $custom-dark: #000000;
JSON
{
"hex": "#1f1ca1",
"rgb": {
"r": 31,
"g": 28,
"b": 161
},
"hsl": {
"h": 241.353,
"s": 70.37,
"l": 37.059
},
"oklch": {
"l": 0.35363,
"c": 0.2001,
"h": 270.7
},
"luminance": 0.03695
}Semantic roles & 50–950 ramp
primary
#1F1CA1
secondary
#C2C554
accent
#ED3BE9
background
#F7F5FB
surface
#EEE9F7
border
#C9C5D0
text
#0A0412
muted
#7C7981