#1B455F#1B455F
#1B455F is a dark, moderate cyan. Relative luminance 0.053; OKLCH L 37.4% C 0.064 H 239.0°. Best body text is #FFFFFF at 10.18:1 contrast (WCAG AA passes).
Color values
| HEX | #1B455F |
|---|---|
| RGB | rgb(27, 69, 95) |
| HSL | hsl(203, 56%, 24%) |
| HSV | hsv(203, 72%, 37%) |
| CMYK | cmyk(71.6%, 27.4%, 0%, 62.7%) |
| CIE-LAB | lab(27.61, -5.19, -19.63) |
| CIE-LCH | lch(27.61, 20.30, 255.19°) |
| OKLab | oklab(37.35% -0.0331 -0.0552) |
| OKLCH | oklch(37.35% 0.064 239) |
| XYZ | xyz(4.6449, 5.3150, 11.6054) |
| Luminance | 0.0532 (WCAG relative) |
| Temperature | cool |
| Family | cyan |
Closest named colors
Dark Slate Blue
#214761
ΔE00 0.99
Dark Grey Blue
#29465B
ΔE00 2.31
Dark Blue Grey
#1F3B4D
ΔE00 4.24
Prussian Blue
#004577
ΔE00 5.62
Twilight Blue
#0A437A
ΔE00 6.44
Deep Sea Blue
#015482
ΔE00 6.78
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#1B455F #5F351B
analogous
#1B5F57 #1B455F #1B235F
triadic
#1B455F #5F1B45 #455F1B
tetradic
#1B455F #571B5F #5F351B #235F1B
square
#1B455F #571B5F #5F351B #235F1B
split-complementary
#1B455F #5F1B23 #5F571B
monochromatic
#071118 #0D222F #1B455F #29688F #368ABE
Accessibility & contrast
On white
10.18
#1B455F on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.06
#1B455F on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #1B455F
10.18:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##1B455F | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##1B455F | 1.00 | 10.18 | 2.06 | 10.18 |
| #FFFFFF | 10.18 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.06 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 10.18 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#394560
Deuteranopia (green-blind)
#303E5F
Tritanopia (blue-blind)
#004C4E
Achromatopsia (no color)
#414141
Design tokens & code
CSS
--color: #1b455f; /* rgb */ color: rgb(27, 69, 95); /* oklch */ color: oklch(37.4% 0.064 239.0);
Tailwind
colors: {
custom: {
50: '#60788c',
500: '#1b455f',
950: '#000000',
},
}SCSS
$custom: #1b455f; $custom-light: #60788c; $custom-dark: #000000;
JSON
{
"hex": "#1b455f",
"rgb": {
"r": 27,
"g": 69,
"b": 95
},
"hsl": {
"h": 202.941,
"s": 55.738,
"l": 23.922
},
"oklch": {
"l": 0.37355,
"c": 0.06441,
"h": 239
},
"luminance": 0.05315
}Semantic roles & 50–950 ramp
primary
#1B455F
secondary
#956141
accent
#8249DF
background
#F5F7F8
surface
#EAEDF0
border
#C6C8CB
text
#05090C
muted
#797B7D