#311FA9#311FA9
#311FA9 is a dark, highly saturated blue. Relative luminance 0.045; OKLCH L 37.8% C 0.202 H 276.4°. Best body text is #FFFFFF at 11.05:1 contrast (WCAG AA passes).
Color values
| HEX | #311FA9 |
|---|---|
| RGB | rgb(49, 31, 169) |
| HSL | hsl(248, 69%, 39%) |
| HSV | hsv(248, 82%, 66%) |
| CMYK | cmyk(71%, 81.7%, 0%, 33.7%) |
| CIE-LAB | lab(25.25, 49.38, -69.60) |
| CIE-LCH | lch(25.25, 85.34, 305.36°) |
| OKLab | oklab(37.76% 0.0227 -0.2012) |
| OKLCH | oklch(37.76% 0.202 276.4) |
| XYZ | xyz(8.9157, 4.4967, 37.9265) |
| Luminance | 0.0450 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Indigo Blue
#3A18B1
ΔE00 1.81
Ultramarine
#2000B1
ΔE00 3.85
Cobalt Blue
#030AA7
ΔE00 4.05
Royal Blue (survey)
#0504AA
ΔE00 4.32
True Blue
#010FCC
ΔE00 4.53
Royal
#0C1793
ΔE00 4.57
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#311FA9 #97A91F
analogous
#1F52A9 #311FA9 #761FA9
triadic
#311FA9 #A9311F #1FA931
tetradic
#311FA9 #A91F52 #97A91F #1FA976
square
#311FA9 #A91F52 #97A91F #1FA976
split-complementary
#311FA9 #A9761F #52A91F
monochromatic
#130C42 #221675 #311FA9 #432DD8 #7160E2
Accessibility & contrast
On white
11.05
#311FA9 on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
1.90
#311FA9 on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #311FA9
11.05:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##311FA9 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##311FA9 | 1.00 | 11.05 | 1.90 | 11.05 |
| #FFFFFF | 11.05 | 1.00 | 21.00 | 1.00 |
| #000000 | 1.90 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 11.05 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#0041AD
Deuteranopia (green-blind)
#0036A7
Tritanopia (blue-blind)
#004A65
Achromatopsia (no color)
#3C3C3C
Design tokens & code
CSS
--color: #311fa9; /* rgb */ color: rgb(49, 31, 169); /* oklch */ color: oklch(37.8% 0.202 276.4);
Tailwind
colors: {
custom: {
50: '#7c5fc4',
500: '#311fa9',
950: '#000000',
},
}SCSS
$custom: #311fa9; $custom-light: #7c5fc4; $custom-dark: #000000;
JSON
{
"hex": "#311fa9",
"rgb": {
"r": 49,
"g": 31,
"b": 169
},
"hsl": {
"h": 247.826,
"s": 69,
"l": 39.216
},
"oklch": {
"l": 0.37762,
"c": 0.20243,
"h": 276.4
},
"luminance": 0.04498
}Semantic roles & 50–950 ramp
primary
#311FA9
secondary
#B9C75D
accent
#EC3CD5
background
#F8F5FC
surface
#EFEAF8
border
#CAC6D1
text
#0B0513
muted
#7C7982