bluecool
Cobalt #0047AB
A deep vivid blue named after the cobalt pigment.
Use cases: Art · Vivid accents
Color values
| Format | Value | |
|---|---|---|
| HEX | #0047AB | |
| RGB | rgb(0, 71, 171) | |
| HSL | hsl(215, 100%, 34%) | |
| HSV | hsv(215, 100%, 67%) | |
| CMYK | cmyk(100%, 58.5%, 0%, 32.9%) | |
| XYZ | xyz(9.6012, 7.4454, 39.4512) | |
| CIE-LAB | lab(32.8, 22.5, -58.4) | |
| Luminance | 0.074 (WCAG relative) |
/* Cobalt */
color: #0047ab;
background-color: #0047ab;
Shade scale
Perceptual 50–950 scale, interpolated in CIE-LAB. Step 500 is the base color. Edit in the shade generator →
Shades (toward black)
#00409a #003989 #003278 #002b67 #002456 #001c44 #001533 #000e22 #000711 #000000
Tints (toward white)
#1a59b3 #336cbc #4d7ec4 #6691cd #80a3d5 #99b5dd #b3c8e6 #ccdaee #e6edf7 #ffffff
Tones (toward gray)
#0d4da7 #1a52a2 #26589e #335e9a #406496 #4d6991 #5a6f8d #667589 #737a84 #808080
Color harmonies
Complementary
Edit in generator →#0047AB
#AB6400
#0047ab #ab6400
Analogous
Edit in generator →#009CAB
#0047AB
#0F00AB
#009cab #0047ab #0f00ab
Triadic
Edit in generator →#0047AB
#AB0047
#47AB00
#0047ab #ab0047 #47ab00
Tetradic
Edit in generator →#0047AB
#AB009C
#AB6400
#00AB0F
#0047ab #ab009c #ab6400 #00ab0f
Split Complementary
Edit in generator →#0047AB
#AB0F00
#9CAB00
#0047ab #ab0f00 #9cab00
Monochromatic
Edit in generator →#001431
#002E6E
#0047AB
#0060E8
#2680FF
#001431 #002e6e #0047ab #0060e8 #2680ff
Accessibility & contrast
8.44
#0047AB on #FFFFFF
AA text ✓AA large ✓AAA text ✓UI 3:1 ✓
2.49
#0047AB on #000000
AA text ✗AA large ✗AAA text ✗UI 3:1 ✗
Best text on cobalt
8.44
#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 |
|---|---|---|
| Sapphire #0F52BA | 3.85 | |
| Denim #1560BD | 8.52 | |
| Ocean Blue #4F42B5 | 8.98 | |
| Royal Blue #4169E1 | 13.37 | |
| Charcoal #36454F | 13.44 | |
| Slate Blue #6A5ACD | 13.70 |
Related colors
Palettes with cobalt
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.