bluecoolCSS named color
Blue #0000FF
Pure blue; the most broadly trusted color, favored by corporate and tech brands.
Use cases: Corporate identity · Links
Color values
| Format | Value | |
|---|---|---|
| HEX | #0000FF | |
| RGB | rgb(0, 0, 255) | |
| HSL | hsl(240, 100%, 50%) | |
| HSV | hsv(240, 100%, 100%) | |
| CMYK | cmyk(100%, 100%, 0%, 0%) | |
| XYZ | xyz(18.0438, 7.2175, 95.0304) | |
| CIE-LAB | lab(32.3, 79.2, -107.9) | |
| Luminance | 0.072 (WCAG relative) |
/* Blue */
color: #0000ff;
background-color: #0000ff;
Shade scale
Perceptual 50–950 scale, interpolated in CIE-LAB. Step 500 is the base color. Edit in the shade generator →
Shades (toward black)
#0000e6 #0000cc #0000b3 #000099 #000080 #000066 #00004d #000033 #00001a #000000
Tints (toward white)
#1a1aff #3333ff #4d4dff #6666ff #8080ff #9999ff #b3b3ff #ccccff #e6e6ff #ffffff
Tones (toward gray)
#0d0df2 #1a1ae6 #2626d9 #3333cc #4040c0 #4d4db3 #5a5aa6 #666699 #73738d #808080
Color harmonies
Complementary
Edit in generator →#0000FF
#FFFF00
#0000ff #ffff00
Analogous
Edit in generator →#007FFF
#0000FF
#7F00FF
#007fff #0000ff #7f00ff
Triadic
Edit in generator →#0000FF
#FF0000
#00FF00
#0000ff #ff0000 #00ff00
Tetradic
Edit in generator →#0000FF
#FF0080
#FFFF00
#00FF80
#0000ff #ff0080 #ffff00 #00ff80
Split Complementary
Edit in generator →#0000FF
#FF8000
#80FF00
#0000ff #ff8000 #80ff00
Monochromatic
Edit in generator →#000085
#0000C2
#0000FF
#3D3DFF
#7A7AFF
#000085 #0000c2 #0000ff #3d3dff #7a7aff
Accessibility & contrast
8.59
#0000FF on #FFFFFF
AA text ✓AA large ✓AAA text ✓UI 3:1 ✓
2.44
#0000FF on #000000
AA text ✗AA large ✗AAA text ✗UI 3:1 ✗
Best text on blue
8.59
#FFFFFF text
WCAG 2.1: AA needs ≥4.5:1 for normal text, ≥3:1 for large text and UI components; AAA needs ≥7:1 / ≥4.5:1.
Color blindness preview
Simulation using the Machado et al. (2009) physiological model, severity 1.0. This is an approximation of perception — not a medical assessment.
Closest named colors
Nearest matches by CIEDE2000 perceptual distance (ΔE₀₀).
| Color | Name | ΔE₀₀ |
|---|---|---|
| Ocean Blue #4F42B5 | 11.32 | |
| Violet #8F00FF | 11.40 | |
| Cobalt #0047AB | 15.21 | |
| Indigo #4B0082 | 15.77 | |
| Charcoal #36454F | 16.01 | |
| Slate Blue #6A5ACD | 16.08 |
Related colors
Palettes with blue
Values computed from the sRGB color model. CMYK is the naive sRGB conversion without an ICC profile. RGB percentages may differ between color-managed applications.