#1B538D#1B538D
#1B538D is a dark, moderate cyan. Relative luminance 0.083; OKLCH L 43.8% C 0.112 H 252.6°. Best body text is #FFFFFF at 7.87:1 contrast (WCAG AA passes).
Color values
| HEX | #1B538D |
|---|---|
| RGB | rgb(27, 83, 141) |
| HSL | hsl(211, 68%, 33%) |
| HSV | hsv(211, 81%, 55%) |
| CMYK | cmyk(80.9%, 41.1%, 0%, 44.7%) |
| CIE-LAB | lab(34.68, 3.82, -37.27) |
| CIE-LCH | lch(34.68, 37.46, 275.85°) |
| OKLab | oklab(43.75% -0.0334 -0.1065) |
| OKLCH | oklch(43.75% 0.112 252.6) |
| XYZ | xyz(8.3512, 8.3416, 26.3641) |
| Luminance | 0.0834 (WCAG relative) |
| Temperature | cool |
| Family | cyan |
Closest named colors
Dusk Blue
#26538D
ΔE00 1.38
Light Navy
#155084
ΔE00 1.61
Light Navy Blue
#2E5A88
ΔE00 2.72
Deep Sea Blue
#015482
ΔE00 3.90
Cobalt (survey)
#1E488F
ΔE00 4.52
Denim Blue
#3B5B92
ΔE00 4.56
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#1B538D #8D551B
analogous
#1B8C8D #1B538D #1C1B8D
triadic
#1B538D #8D1B53 #538D1B
tetradic
#1B538D #8D1B8C #8D551B #1B8D1C
square
#1B538D #8D1B8C #8D551B #1B8D1C
split-complementary
#1B538D #8D1C1B #8C8D1B
monochromatic
#071726 #11355A #1B538D #2571C0 #4790DC
Accessibility & contrast
On white
7.87
#1B538D on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.67
#1B538D on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #1B538D
7.87:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##1B538D | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##1B538D | 1.00 | 7.87 | 2.67 | 7.87 |
| #FFFFFF | 7.87 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.67 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 7.87 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#37578F
Deuteranopia (green-blind)
#244D8C
Tritanopia (blue-blind)
#006169
Achromatopsia (no color)
#525252
Design tokens & code
CSS
--color: #1b538d; /* rgb */ color: rgb(27, 83, 141); /* oklch */ color: oklch(43.8% 0.112 252.6);
Tailwind
colors: {
custom: {
50: '#6a82af',
500: '#1b538d',
950: '#000000',
},
}SCSS
$custom: #1b538d; $custom-light: #6a82af; $custom-dark: #000000;
JSON
{
"hex": "#1b538d",
"rgb": {
"r": 27,
"g": 83,
"b": 141
},
"hsl": {
"h": 210.526,
"s": 67.857,
"l": 32.941
},
"oklch": {
"l": 0.4375,
"c": 0.11161,
"h": 252.6
},
"luminance": 0.08343
}Semantic roles & 50–950 ramp
primary
#1B538D
secondary
#BD8346
accent
#953DEB
background
#F6F7FA
surface
#ECEEF4
border
#C7C9CE
text
#070A10
muted
#7A7C7F