#1F388A#1F388A
#1F388A is a dark, vivid blue. Relative luminance 0.050; OKLCH L 37.5% C 0.140 H 266.6°. Best body text is #FFFFFF at 10.55:1 contrast (WCAG AA passes).
Color values
| HEX | #1F388A |
|---|---|
| RGB | rgb(31, 56, 138) |
| HSL | hsl(226, 63%, 33%) |
| HSV | hsv(226, 78%, 54%) |
| CMYK | cmyk(77.5%, 59.4%, 0%, 45.9%) |
| CIE-LAB | lab(26.60, 21.52, -48.44) |
| CIE-LCH | lch(26.60, 53.00, 293.95°) |
| OKLab | oklab(37.53% -0.0084 -0.1398) |
| OKLCH | oklch(37.53% 0.14 266.6) |
| XYZ | xyz(6.5651, 4.9539, 24.6500) |
| Luminance | 0.0495 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Sapphire (survey)
#2138AB
ΔE00 5.08
Darkish Blue
#014182
ΔE00 5.65
Cobalt (survey)
#1E488F
ΔE00 5.70
Blueberry
#464196
ΔE00 6.11
Cobalt
#0047AB
ΔE00 6.46
Marine Blue
#01386A
ΔE00 6.58
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#1F388A #8A711F
analogous
#1F6D8A #1F388A #3B1F8A
triadic
#1F388A #8A1F38 #388A1F
tetradic
#1F388A #8A1F6D #8A711F #1F8A3B
square
#1F388A #8A1F6D #8A711F #1F8A3B
split-complementary
#1F388A #8A3B1F #6D8A1F
monochromatic
#090F26 #142458 #1F388A #2A4CBC #4C6DD7
Accessibility & contrast
On white
10.55
#1F388A on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
1.99
#1F388A on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #1F388A
10.55:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##1F388A | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##1F388A | 1.00 | 10.55 | 1.99 | 10.55 |
| #FFFFFF | 10.55 | 1.00 | 21.00 | 1.00 |
| #000000 | 1.99 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 10.55 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#00448D
Deuteranopia (green-blind)
#003A88
Tritanopia (blue-blind)
#004D5B
Achromatopsia (no color)
#3F3F3F
Design tokens & code
CSS
--color: #1f388a; /* rgb */ color: rgb(31, 56, 138); /* oklch */ color: oklch(37.5% 0.140 266.6);
Tailwind
colors: {
custom: {
50: '#6c6ead',
500: '#1f388a',
950: '#000000',
},
}SCSS
$custom: #1f388a; $custom-light: #6c6ead; $custom-dark: #000000;
JSON
{
"hex": "#1f388a",
"rgb": {
"r": 31,
"g": 56,
"b": 138
},
"hsl": {
"h": 225.981,
"s": 63.314,
"l": 33.137
},
"oklch": {
"l": 0.3753,
"c": 0.14007,
"h": 266.6
},
"luminance": 0.04955
}Semantic roles & 50–950 ramp
primary
#1F388A
secondary
#BAA04B
accent
#C041E6
background
#F7F6FA
surface
#EDEBF4
border
#C8C6CE
text
#080710
muted
#7B7A7F