#2138BC#2138BC
#2138BC is a dark, highly saturated blue. Relative luminance 0.068; OKLCH L 42.4% C 0.206 H 267.6°. Best body text is #FFFFFF at 8.91:1 contrast (WCAG AA passes).
Color values
| HEX | #2138BC |
|---|---|
| RGB | rgb(33, 56, 188) |
| HSL | hsl(231, 70%, 43%) |
| HSV | hsv(231, 82%, 74%) |
| CMYK | cmyk(82.4%, 70.2%, 0%, 26.3%) |
| CIE-LAB | lab(31.30, 40.62, -70.96) |
| CIE-LCH | lch(31.30, 81.76, 299.78°) |
| OKLab | oklab(42.42% -0.0085 -0.2057) |
| OKLCH | oklch(42.42% 0.206 267.6) |
| XYZ | xyz(11.1153, 6.7812, 48.2903) |
| Luminance | 0.0678 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Sapphire (survey)
#2138AB
ΔE00 2.36
Blue Blue
#2242C7
ΔE00 3.12
Blue (survey)
#0343DF
ΔE00 5.29
Ocean Blue
#4F42B5
ΔE00 5.39
Blue With A Hint Of Purple
#533CC6
ΔE00 5.77
Blurple
#5539CC
ΔE00 6.28
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#2138BC #BCA521
analogous
#2185BC #2138BC #5721BC
triadic
#2138BC #BC2138 #38BC21
tetradic
#2138BC #BC2185 #BCA521 #21BC57
square
#2138BC #BC2185 #BCA521 #21BC57
split-complementary
#2138BC #BC5721 #85BC21
monochromatic
#0F1954 #182888 #2138BC #3D55DD #7183E6
Accessibility & contrast
On white
8.91
#2138BC on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.36
#2138BC on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #2138BC
8.91:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##2138BC | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##2138BC | 1.00 | 8.91 | 2.36 | 8.91 |
| #FFFFFF | 8.91 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.36 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 8.91 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#0051C0
Deuteranopia (green-blind)
#0042BA
Tritanopia (blue-blind)
#005D76
Achromatopsia (no color)
#4A4A4A
Design tokens & code
CSS
--color: #2138bc; /* rgb */ color: rgb(33, 56, 188); /* oklch */ color: oklch(42.4% 0.206 267.6);
Tailwind
colors: {
custom: {
50: '#7a6fd1',
500: '#2138bc',
950: '#000000',
},
}SCSS
$custom: #2138bc; $custom-light: #7a6fd1; $custom-dark: #000000;
JSON
{
"hex": "#2138bc",
"rgb": {
"r": 33,
"g": 56,
"b": 188
},
"hsl": {
"h": 231.097,
"s": 70.136,
"l": 43.333
},
"oklch": {
"l": 0.42419,
"c": 0.20583,
"h": 267.6
},
"luminance": 0.06783
}Semantic roles & 50–950 ramp
primary
#2138BC
secondary
#CDBE6C
accent
#D33BED
background
#F8F6FD
surface
#EFECFA
border
#CAC7D3
text
#0B0714
muted
#7C7A83