#1F397A#1F397A
#1F397A is a dark, moderate blue. Relative luminance 0.046; OKLCH L 36.4% C 0.115 H 264.8°. Best body text is #FFFFFF at 10.91:1 contrast (WCAG AA passes).
Color values
| HEX | #1F397A |
|---|---|
| RGB | rgb(31, 57, 122) |
| HSL | hsl(223, 59%, 30%) |
| HSV | hsv(223, 75%, 48%) |
| CMYK | cmyk(74.6%, 53.3%, 0%, 52.2%) |
| CIE-LAB | lab(25.63, 14.42, -40.00) |
| CIE-LCH | lch(25.63, 42.52, 289.82°) |
| OKLab | oklab(36.4% -0.0104 -0.115) |
| OKLCH | oklch(36.4% 0.115 264.8) |
| XYZ | xyz(5.5398, 4.6221, 19.0088) |
| Luminance | 0.0462 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Marine Blue
#01386A
ΔE00 4.55
Darkish Blue
#014182
ΔE00 4.59
Marine
#042E60
ΔE00 5.09
Twilight Blue
#0A437A
ΔE00 5.39
Cobalt (survey)
#1E488F
ΔE00 5.51
Prussian Blue
#004577
ΔE00 7.00
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#1F397A #7A601F
analogous
#1F677A #1F397A #321F7A
triadic
#1F397A #7A1F39 #397A1F
tetradic
#1F397A #7A1F67 #7A601F #1F7A32
square
#1F397A #7A1F67 #7A601F #1F7A32
split-complementary
#1F397A #7A321F #677A1F
monochromatic
#060B18 #132249 #1F397A #2B50AB #446CCF
Accessibility & contrast
On white
10.91
#1F397A on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
1.92
#1F397A on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #1F397A
10.91:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##1F397A | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##1F397A | 1.00 | 10.91 | 1.92 | 10.91 |
| #FFFFFF | 10.91 | 1.00 | 21.00 | 1.00 |
| #000000 | 1.92 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 10.91 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#10417C
Deuteranopia (green-blind)
#003979
Tritanopia (blue-blind)
#004953
Achromatopsia (no color)
#3D3D3D
Design tokens & code
CSS
--color: #1f397a; /* rgb */ color: rgb(31, 57, 122); /* oklch */ color: oklch(36.4% 0.115 264.8);
Tailwind
colors: {
custom: {
50: '#686ea1',
500: '#1f397a',
950: '#000000',
},
}SCSS
$custom: #1f397a; $custom-light: #686ea1; $custom-dark: #000000;
JSON
{
"hex": "#1f397a",
"rgb": {
"r": 31,
"g": 57,
"b": 122
},
"hsl": {
"h": 222.857,
"s": 59.477,
"l": 30
},
"oklch": {
"l": 0.36398,
"c": 0.11546,
"h": 264.8
},
"luminance": 0.04623
}Semantic roles & 50–950 ramp
primary
#1F397A
secondary
#AD9047
accent
#B645E3
background
#F6F6FA
surface
#EBEBF3
border
#C6C6CD
text
#07070F
muted
#7A7A7F