#1B258D#1B258D
#1B258D is a dark, vivid blue. Relative luminance 0.035; OKLCH L 34.1% C 0.168 H 269.6°. Best body text is #FFFFFF at 12.38:1 contrast (WCAG AA passes).
Color values
| HEX | #1B258D |
|---|---|
| RGB | rgb(27, 37, 141) |
| HSL | hsl(235, 68%, 33%) |
| HSV | hsv(235, 81%, 55%) |
| CMYK | cmyk(80.9%, 73.8%, 0%, 44.7%) |
| CIE-LAB | lab(21.87, 34.97, -58.08) |
| CIE-LCH | lch(21.87, 67.80, 301.06°) |
| OKLab | oklab(34.09% -0.001 -0.1682) |
| OKLCH | oklch(34.09% 0.168 269.6) |
| XYZ | xyz(5.9196, 3.4786, 25.5536) |
| Luminance | 0.0348 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Royal
#0C1793
ΔE00 3.47
Midnight Blue
#191970
ΔE00 5.04
Cobalt Blue
#030AA7
ΔE00 6.05
Sapphire (survey)
#2138AB
ΔE00 6.37
Royal Blue (survey)
#0504AA
ΔE00 6.67
Indigo Blue
#3A18B1
ΔE00 6.87
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#1B258D #8D831B
analogous
#1B5E8D #1B258D #4A1B8D
triadic
#1B258D #8D1B25 #258D1B
tetradic
#1B258D #8D1B5E #8D831B #1B8D4A
square
#1B258D #8D1B5E #8D831B #1B8D4A
split-complementary
#1B258D #8D4A1B #5E8D1B
monochromatic
#070A26 #11185A #1B258D #2532C0 #4754DC
Accessibility & contrast
On white
12.38
#1B258D on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
1.70
#1B258D on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #1B258D
12.38:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##1B258D | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##1B258D | 1.00 | 12.38 | 1.70 | 12.38 |
| #FFFFFF | 12.38 | 1.00 | 21.00 | 1.00 |
| #000000 | 1.70 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 12.38 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#003A90
Deuteranopia (green-blind)
#002F8B
Tritanopia (blue-blind)
#004356
Achromatopsia (no color)
#343434
Design tokens & code
CSS
--color: #1b258d; /* rgb */ color: rgb(27, 37, 141); /* oklch */ color: oklch(34.1% 0.168 269.6);
Tailwind
colors: {
custom: {
50: '#6d60af',
500: '#1b258d',
950: '#000000',
},
}SCSS
$custom: #1b258d; $custom-light: #6d60af; $custom-dark: #000000;
JSON
{
"hex": "#1b258d",
"rgb": {
"r": 27,
"g": 37,
"b": 141
},
"hsl": {
"h": 234.737,
"s": 67.857,
"l": 32.941
},
"oklch": {
"l": 0.3409,
"c": 0.16823,
"h": 269.6
},
"luminance": 0.03479
}Semantic roles & 50–950 ramp
primary
#1B258D
secondary
#BDB346
accent
#DB3DEB
background
#F7F5FA
surface
#EDE9F5
border
#C8C5CF
text
#080511
muted
#7B7980