#1D388B#1D388B
#1D388B is a dark, vivid blue. Relative luminance 0.050; OKLCH L 37.5% C 0.142 H 265.9°. Best body text is #FFFFFF at 10.55:1 contrast (WCAG AA passes).
Color values
| HEX | #1D388B |
|---|---|
| RGB | rgb(29, 56, 139) |
| HSL | hsl(225, 65%, 33%) |
| HSV | hsv(225, 79%, 55%) |
| CMYK | cmyk(79.1%, 59.7%, 0%, 45.5%) |
| CIE-LAB | lab(26.60, 21.68, -49.07) |
| CIE-LCH | lch(26.60, 53.64, 293.83°) |
| OKLab | oklab(37.53% -0.0101 -0.1417) |
| OKLCH | oklch(37.53% 0.142 265.9) |
| XYZ | xyz(6.5794, 4.9529, 25.0303) |
| Luminance | 0.0495 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Sapphire (survey)
#2138AB
ΔE00 4.98
Darkish Blue
#014182
ΔE00 5.55
Cobalt (survey)
#1E488F
ΔE00 5.62
Blueberry
#464196
ΔE00 6.24
Cobalt
#0047AB
ΔE00 6.31
Marine Blue
#01386A
ΔE00 6.53
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#1D388B #8B701D
analogous
#1D6F8B #1D388B #391D8B
triadic
#1D388B #8B1D38 #388B1D
tetradic
#1D388B #8B1D6F #8B701D #1D8B39
square
#1D388B #8B1D6F #8B701D #1D8B39
split-complementary
#1D388B #8B391D #6F8B1D
monochromatic
#080F26 #122458 #1D388B #284CBE #496DD9
Accessibility & contrast
On white
10.55
#1D388B on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
1.99
#1D388B on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #1D388B
10.55:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##1D388B | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##1D388B | 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)
#00448E
Deuteranopia (green-blind)
#003A89
Tritanopia (blue-blind)
#004D5C
Achromatopsia (no color)
#3F3F3F
Design tokens & code
CSS
--color: #1d388b; /* rgb */ color: rgb(29, 56, 139); /* oklch */ color: oklch(37.5% 0.142 265.9);
Tailwind
colors: {
custom: {
50: '#6b6eae',
500: '#1d388b',
950: '#000000',
},
}SCSS
$custom: #1d388b; $custom-light: #6b6eae; $custom-dark: #000000;
JSON
{
"hex": "#1d388b",
"rgb": {
"r": 29,
"g": 56,
"b": 139
},
"hsl": {
"h": 225.273,
"s": 65.476,
"l": 32.941
},
"oklch": {
"l": 0.3753,
"c": 0.14206,
"h": 265.9
},
"luminance": 0.04954
}Semantic roles & 50–950 ramp
primary
#1D388B
secondary
#BB9F49
accent
#BF3FE8
background
#F7F6FA
surface
#EDEBF4
border
#C8C6CE
text
#080710
muted
#7B7A7F