#1B457B#1B457B
#1B457B is a dark, moderate cyan. Relative luminance 0.059; OKLCH L 39.1% C 0.103 H 256.1°. Best body text is #FFFFFF at 9.62:1 contrast (WCAG AA passes).
Color values
| HEX | #1B457B |
|---|---|
| RGB | rgb(27, 69, 123) |
| HSL | hsl(214, 64%, 29%) |
| HSV | hsv(214, 78%, 48%) |
| CMYK | cmyk(78%, 43.9%, 0%, 51.8%) |
| CIE-LAB | lab(29.21, 5.92, -34.89) |
| CIE-LCH | lch(29.21, 35.39, 279.63°) |
| OKLab | oklab(39.12% -0.0247 -0.0998) |
| OKLCH | oklch(39.12% 0.103 256.1) |
| XYZ | xyz(6.1539, 5.9186, 19.5531) |
| Luminance | 0.0592 (WCAG relative) |
| Temperature | cool |
| Family | cyan |
Closest named colors
Twilight Blue
#0A437A
ΔE00 1.45
Darkish Blue
#014182
ΔE00 1.88
Prussian Blue
#004577
ΔE00 2.82
Cobalt (survey)
#1E488F
ΔE00 2.88
Light Navy
#155084
ΔE00 4.35
Marine Blue
#01386A
ΔE00 4.42
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#1B457B #7B511B
analogous
#1B757B #1B457B #211B7B
triadic
#1B457B #7B1B45 #457B1B
tetradic
#1B457B #7B1B75 #7B511B #1B7B21
square
#1B457B #7B1B75 #7B511B #1B7B21
split-complementary
#1B457B #7B211B #757B1B
monochromatic
#060E19 #102949 #1B457B #2661AD #3C7FD4
Accessibility & contrast
On white
9.62
#1B457B on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.18
#1B457B on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #1B457B
9.62:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##1B457B | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##1B457B | 1.00 | 9.62 | 2.18 | 9.62 |
| #FFFFFF | 9.62 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.18 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 9.62 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#2B4A7D
Deuteranopia (green-blind)
#1A417A
Tritanopia (blue-blind)
#00525A
Achromatopsia (no color)
#454545
Design tokens & code
CSS
--color: #1b457b; /* rgb */ color: rgb(27, 69, 123); /* oklch */ color: oklch(39.1% 0.103 256.1);
Tailwind
colors: {
custom: {
50: '#6678a1',
500: '#1b457b',
950: '#000000',
},
}SCSS
$custom: #1b457b; $custom-light: #6678a1; $custom-dark: #000000;
JSON
{
"hex": "#1b457b",
"rgb": {
"r": 27,
"g": 69,
"b": 123
},
"hsl": {
"h": 213.75,
"s": 64,
"l": 29.412
},
"oklch": {
"l": 0.39124,
"c": 0.1028,
"h": 256.1
},
"luminance": 0.05919
}Semantic roles & 50–950 ramp
primary
#1B457B
secondary
#AF8043
accent
#9E41E7
background
#F6F7FA
surface
#EBEDF3
border
#C6C8CD
text
#07080F
muted
#7A7B7F