#2728B1#2728B1
#2728B1 is a dark, highly saturated blue. Relative luminance 0.051; OKLCH L 39.1% C 0.207 H 271.3°. Best body text is #FFFFFF at 10.37:1 contrast (WCAG AA passes).
Color values
| HEX | #2728B1 |
|---|---|
| RGB | rgb(39, 40, 177) |
| HSL | hsl(240, 64%, 42%) |
| HSV | hsv(240, 78%, 69%) |
| CMYK | cmyk(78%, 77.4%, 0%, 30.6%) |
| CIE-LAB | lab(27.08, 46.58, -71.40) |
| CIE-LCH | lch(27.08, 85.25, 303.12°) |
| OKLab | oklab(39.13% 0.0047 -0.2067) |
| OKLCH | oklch(39.13% 0.207 271.3) |
| XYZ | xyz(9.5286, 5.1222, 42.0729) |
| Luminance | 0.0512 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Indigo Blue
#3A18B1
ΔE00 3.51
Sapphire (survey)
#2138AB
ΔE00 4.56
True Blue
#010FCC
ΔE00 4.60
Mediumblue
#0000CD
ΔE00 5.50
Ultramarine
#2000B1
ΔE00 5.55
Cobalt Blue
#030AA7
ΔE00 5.56
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#2728B1 #B1B027
analogous
#276DB1 #2728B1 #6B27B1
triadic
#2728B1 #B12728 #28B127
tetradic
#2728B1 #B1276D #B1B027 #27B16B
square
#2728B1 #B1276D #B1B027 #27B16B
split-complementary
#2728B1 #B16B27 #6DB127
monochromatic
#11114D #1C1D7F #2728B1 #4041D5 #7273E0
Accessibility & contrast
On white
10.37
#2728B1 on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.02
#2728B1 on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #2728B1
10.37:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##2728B1 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##2728B1 | 1.00 | 10.37 | 2.02 | 10.37 |
| #FFFFFF | 10.37 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.02 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 10.37 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#0047B5
Deuteranopia (green-blind)
#0039AF
Tritanopia (blue-blind)
#00516B
Achromatopsia (no color)
#404040
Design tokens & code
CSS
--color: #2728b1; /* rgb */ color: rgb(39, 40, 177); /* oklch */ color: oklch(39.1% 0.207 271.3);
Tailwind
colors: {
custom: {
50: '#7a64ca',
500: '#2728b1',
950: '#000000',
},
}SCSS
$custom: #2728b1; $custom-light: #7a64ca; $custom-dark: #000000;
JSON
{
"hex": "#2728b1",
"rgb": {
"r": 39,
"g": 40,
"b": 177
},
"hsl": {
"h": 239.565,
"s": 63.889,
"l": 42.353
},
"oklch": {
"l": 0.39134,
"c": 0.20676,
"h": 271.3
},
"luminance": 0.05123
}Semantic roles & 50–950 ramp
primary
#2728B1
secondary
#C7C66D
accent
#E641E7
background
#F8F6FC
surface
#EFEBF9
border
#CAC6D2
text
#0B0613
muted
#7C7A82