#233FA4#233FA4
#233FA4 is a dark, vivid blue. Relative luminance 0.066; OKLCH L 41.4% C 0.166 H 266.8°. Best body text is #FFFFFF at 9.06:1 contrast (WCAG AA passes).
Color values
| HEX | #233FA4 |
|---|---|
| RGB | rgb(35, 63, 164) |
| HSL | hsl(227, 65%, 39%) |
| HSV | hsv(227, 79%, 64%) |
| CMYK | cmyk(78.7%, 61.6%, 0%, 35.7%) |
| CIE-LAB | lab(30.86, 27.34, -57.38) |
| CIE-LCH | lch(30.86, 63.56, 295.47°) |
| OKLab | oklab(41.44% -0.0092 -0.1659) |
| OKLCH | oklch(41.44% 0.166 266.8) |
| XYZ | xyz(9.1691, 6.5916, 35.9038) |
| Luminance | 0.0659 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Sapphire (survey)
#2138AB
ΔE00 2.58
Cobalt
#0047AB
ΔE00 3.78
Blue Blue
#2242C7
ΔE00 4.83
Blueberry
#464196
ΔE00 5.35
Cobalt (survey)
#1E488F
ΔE00 5.38
Ocean Blue
#4F42B5
ΔE00 6.55
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#233FA4 #A48823
analogous
#2380A4 #233FA4 #4823A4
triadic
#233FA4 #A4233F #3FA423
tetradic
#233FA4 #A42380 #A48823 #23A448
square
#233FA4 #A42380 #A48823 #23A448
split-complementary
#233FA4 #A44823 #80A423
monochromatic
#0D183F #182C72 #233FA4 #3154D3 #647EDE
Accessibility & contrast
On white
9.06
#233FA4 on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.32
#233FA4 on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #233FA4
9.06:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##233FA4 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##233FA4 | 1.00 | 9.06 | 2.32 | 9.06 |
| #FFFFFF | 9.06 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.32 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 9.06 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#004FA7
Deuteranopia (green-blind)
#0043A2
Tritanopia (blue-blind)
#00596B
Achromatopsia (no color)
#494949
Design tokens & code
CSS
--color: #233fa4; /* rgb */ color: rgb(35, 63, 164); /* oklch */ color: oklch(41.4% 0.166 266.8);
Tailwind
colors: {
custom: {
50: '#7373c0',
500: '#233fa4',
950: '#000000',
},
}SCSS
$custom: #233fa4; $custom-light: #7373c0; $custom-dark: #000000;
JSON
{
"hex": "#233fa4",
"rgb": {
"r": 35,
"g": 63,
"b": 164
},
"hsl": {
"h": 226.977,
"s": 64.824,
"l": 39.02
},
"oklch": {
"l": 0.41435,
"c": 0.16615,
"h": 266.8
},
"luminance": 0.06593
}Semantic roles & 50–950 ramp
primary
#233FA4
secondary
#C3AE60
accent
#C340E8
background
#F7F7FB
surface
#EEEDF7
border
#C9C8D0
text
#090812
muted
#7B7B81