#1748B4#1748B4
#1748B4 is a dark, vivid blue. Relative luminance 0.081; OKLCH L 44.3% C 0.179 H 262.9°. Best body text is #FFFFFF at 8.01:1 contrast (WCAG AA passes).
Color values
| HEX | #1748B4 |
|---|---|
| RGB | rgb(23, 72, 180) |
| HSL | hsl(221, 77%, 40%) |
| HSV | hsv(221, 87%, 71%) |
| CMYK | cmyk(87.2%, 60%, 0%, 29.4%) |
| CIE-LAB | lab(34.21, 26.53, -61.47) |
| CIE-LCH | lch(34.21, 66.95, 293.35°) |
| OKLab | oklab(44.25% -0.0222 -0.1779) |
| OKLCH | oklch(44.25% 0.179 262.9) |
| XYZ | xyz(10.9060, 8.1108, 44.1619) |
| Luminance | 0.0811 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Cobalt
#0047AB
ΔE00 1.89
Sapphire
#0F52BA
ΔE00 3.53
Blue Blue
#2242C7
ΔE00 3.93
Cobalt (survey)
#1E488F
ΔE00 5.19
Sapphire (survey)
#2138AB
ΔE00 5.31
Blue (survey)
#0343DF
ΔE00 5.93
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#1748B4 #B48317
analogous
#1797B4 #1748B4 #3517B4
triadic
#1748B4 #B41748 #48B417
tetradic
#1748B4 #B41797 #B48317 #17B435
square
#1748B4 #B41797 #B48317 #17B435
split-complementary
#1748B4 #B43517 #97B417
monochromatic
#091D47 #10327E #1748B4 #2560E3 #5B88EA
Accessibility & contrast
On white
8.01
#1748B4 on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.62
#1748B4 on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #1748B4
8.01:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##1748B4 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##1748B4 | 1.00 | 8.01 | 2.62 | 8.01 |
| #FFFFFF | 8.01 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.62 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 8.01 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#0058B8
Deuteranopia (green-blind)
#004AB2
Tritanopia (blue-blind)
#006477
Achromatopsia (no color)
#505050
Design tokens & code
CSS
--color: #1748b4; /* rgb */ color: rgb(23, 72, 180); /* oklch */ color: oklch(44.3% 0.179 262.9);
Tailwind
colors: {
custom: {
50: '#747acb',
500: '#1748b4',
950: '#000000',
},
}SCSS
$custom: #1748b4; $custom-light: #747acb; $custom-dark: #000000;
JSON
{
"hex": "#1748b4",
"rgb": {
"r": 23,
"g": 72,
"b": 180
},
"hsl": {
"h": 221.274,
"s": 77.34,
"l": 39.804
},
"oklch": {
"l": 0.4425,
"c": 0.1793,
"h": 262.9
},
"luminance": 0.08112
}Semantic roles & 50–950 ramp
primary
#1748B4
secondary
#CEA959
accent
#B834F4
background
#F7F7FC
surface
#EEEDF9
border
#C9C8D2
text
#0A0913
muted
#7C7B82