#066AB2
Closest named color: Mid Blue (#276AB3). oklch(51.3% 0.139 248.8), rgb(6, 106, 178).
Aa
White text reads best on this color (5.65:1).
About this color
#066AB2 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.139 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.014 away. White text reads best on it, at 5.65:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.139) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.71:1 |
| White text | 5.65:1 |
Values
| HEX | #066AB2 |
| RGB | rgb(6, 106, 178) |
| HSL | hsl(205, 93%, 36%) |
| OKLCH | oklch(51.3% 0.139 248.8) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #066AB2 | 5.65:1 | AA | Lc -83.0 | Fine for body text |
| Black text on #066AB2 | 3.71:1 | AA large text | Lc 26.4 | Dividers and decoration only |
| #066AB2 text on white | 5.65:1 | AA | Lc 77.7 | Fine for body text |
| #066AB2 text on black | 3.71:1 | AA large text | Lc -24.1 | Dividers and decoration only |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 700.
-
Step 50
50
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E0EBF7
oklch(93.5% 0.02 250.4)
-
Step 200
200
#C7DCF1
oklch(88.5% 0.037 248.2)
-
Step 300
300
#9FC5EB
oklch(80.9% 0.068 248.7)
-
Step 400
400
#69A6E1
oklch(70.8% 0.108 248.8)
-
Step 500
500
#3B8ED8
oklch(63.1% 0.137 248.7)
-
Step 600
600
#0B77C6
oklch(55.7% 0.149 248.8)
-
Step 700
700 (this color)
#066AB2
oklch(51.3% 0.139 248.8)
-
Step 800
800
#04518A
oklch(42.6% 0.115 248.9)
-
Step 900
900
#12446F
oklch(37.8% 0.09 249)
-
Step 950
950
#0D2841
oklch(27% 0.057 249.3)
#066AB2 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #466FB5 | 0.046 |
| Deuteranopia (no green cones) | #2A61B1 | 0.027 |
| Tritanopia (no blue cones) | #007B85 | 0.099 |
| Achromatopsia (no color) | #676767 | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #066AB2
#066AB2
oklch(51.3% 0.139 248.8)
- #905900
#905900
oklch(51.4% 0.112 68.8)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #066AB2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.014
- French Blue #436BAD ΔE 0.039
- Ocean Blue #03719C ΔE 0.045
- Peacock Blue #016795 ΔE 0.047
- Flat Blue #3C73A8 ΔE 0.047
- Nice Blue #107AB0 ΔE 0.048
- Muted Blue #3B719F ΔE 0.050
- Windows Blue #3778BF ΔE 0.053
Use #066AB2 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.