#3137B8#3137B8
#3137B8 is a dark, vivid blue. Relative luminance 0.068; OKLCH L 42.6% C 0.198 H 272.3°. Best body text is #FFFFFF at 8.86:1 contrast (WCAG AA passes).
Color values
| HEX | #3137B8 |
|---|---|
| RGB | rgb(49, 55, 184) |
| HSL | hsl(237, 58%, 46%) |
| HSV | hsv(237, 73%, 72%) |
| CMYK | cmyk(73.4%, 70.1%, 0%, 27.8%) |
| CIE-LAB | lab(31.45, 41.19, -68.33) |
| CIE-LCH | lch(31.45, 79.79, 301.08°) |
| OKLab | oklab(42.62% 0.008 -0.1977) |
| OKLCH | oklch(42.62% 0.198 272.3) |
| XYZ | xyz(11.2816, 6.8449, 46.0647) |
| Luminance | 0.0685 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Sapphire (survey)
#2138AB
ΔE00 2.70
Blue Blue
#2242C7
ΔE00 3.86
Ocean Blue
#4F42B5
ΔE00 4.45
Blue With A Hint Of Purple
#533CC6
ΔE00 4.85
Blurple
#5539CC
ΔE00 5.41
Blue (survey)
#0343DF
ΔE00 6.00
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#3137B8 #B8B231
analogous
#317BB8 #3137B8 #6E31B8
triadic
#3137B8 #B83137 #37B831
tetradic
#3137B8 #B8317B #B8B231 #31B86E
square
#3137B8 #B8317B #B8B231 #31B86E
split-complementary
#3137B8 #B86E31 #7BB831
monochromatic
#171A57 #242988 #3137B8 #555AD2 #8589DE
Accessibility & contrast
On white
8.86
#3137B8 on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.37
#3137B8 on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #3137B8
8.86:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##3137B8 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##3137B8 | 1.00 | 8.86 | 2.37 | 8.86 |
| #FFFFFF | 8.86 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.37 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 8.86 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#0050BC
Deuteranopia (green-blind)
#0044B6
Tritanopia (blue-blind)
#005B73
Achromatopsia (no color)
#4A4A4A
Design tokens & code
CSS
--color: #3137b8; /* rgb */ color: rgb(49, 55, 184); /* oklch */ color: oklch(42.6% 0.198 272.3);
Tailwind
colors: {
custom: {
50: '#7e6fce',
500: '#3137b8',
950: '#000000',
},
}SCSS
$custom: #3137b8; $custom-light: #7e6fce; $custom-dark: #000000;
JSON
{
"hex": "#3137b8",
"rgb": {
"r": 49,
"g": 55,
"b": 184
},
"hsl": {
"h": 237.333,
"s": 57.94,
"l": 45.686
},
"oklch": {
"l": 0.42616,
"c": 0.19782,
"h": 272.3
},
"luminance": 0.06846
}Semantic roles & 50–950 ramp
primary
#3137B8
secondary
#C8C57D
accent
#DA47E1
background
#F8F6FC
surface
#F0ECF9
border
#CBC7D2
text
#0B0714
muted
#7C7A82