#231B8E#231B8E
#231B8E is a dark, vivid blue. Relative luminance 0.031; OKLCH L 33.2% C 0.177 H 274.0°. Best body text is #FFFFFF at 12.97:1 contrast (WCAG AA passes).
Color values
| HEX | #231B8E |
|---|---|
| RGB | rgb(35, 27, 142) |
| HSL | hsl(244, 68%, 33%) |
| HSV | hsv(244, 81%, 56%) |
| CMYK | cmyk(75.4%, 81%, 0%, 44.3%) |
| CIE-LAB | lab(20.41, 41.75, -61.09) |
| CIE-LCH | lch(20.41, 73.99, 304.35°) |
| OKLab | oklab(33.22% 0.0123 -0.1767) |
| OKLCH | oklch(33.22% 0.177 274) |
| XYZ | xyz(5.9659, 3.0936, 25.8686) |
| Luminance | 0.0309 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Royal
#0C1793
ΔE00 1.71
Cobalt Blue
#030AA7
ΔE00 4.16
Darkblue
#00008B
ΔE00 4.61
Royal Blue (survey)
#0504AA
ΔE00 4.71
Midnight Blue
#191970
ΔE00 4.78
Indigo (survey)
#380282
ΔE00 5.03
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#231B8E #868E1B
analogous
#1B4C8E #231B8E #5C1B8E
triadic
#231B8E #8E231B #1B8E23
tetradic
#231B8E #8E1B4C #868E1B #1B8E5C
square
#231B8E #8E1B4C #868E1B #1B8E5C
split-complementary
#231B8E #8E5C1B #4C8E1B
monochromatic
#0A0727 #16115B #231B8E #3025C1 #5247DC
Accessibility & contrast
On white
12.97
#231B8E on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
1.62
#231B8E on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #231B8E
12.97:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##231B8E | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##231B8E | 1.00 | 12.97 | 1.62 | 12.97 |
| #FFFFFF | 12.97 | 1.00 | 21.00 | 1.00 |
| #000000 | 1.62 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 12.97 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#003691
Deuteranopia (green-blind)
#002C8C
Tritanopia (blue-blind)
#003E55
Achromatopsia (no color)
#313131
Design tokens & code
CSS
--color: #231b8e; /* rgb */ color: rgb(35, 27, 142); /* oklch */ color: oklch(33.2% 0.177 274.0);
Tailwind
colors: {
custom: {
50: '#715ab0',
500: '#231b8e',
950: '#000000',
},
}SCSS
$custom: #231b8e; $custom-light: #715ab0; $custom-dark: #000000;
JSON
{
"hex": "#231b8e",
"rgb": {
"r": 35,
"g": 27,
"b": 142
},
"hsl": {
"h": 244.174,
"s": 68.047,
"l": 33.137
},
"oklch": {
"l": 0.33222,
"c": 0.17713,
"h": 274
},
"luminance": 0.03094
}Semantic roles & 50–950 ramp
primary
#231B8E
secondary
#B5BE47
accent
#EB3DDF
background
#F7F5FB
surface
#EDE9F6
border
#C8C5D0
text
#090411
muted
#7B7980