#0066B2
Closest named color: Mid Blue (#276AB3). oklch(50.3% 0.144 250.3), rgb(0, 102, 178).
Aa
White text reads best on this color (5.92:1).
About this color
#0066B2 is a medium-dark, vivid blue. In OKLCH its lightness is 50%, its chroma 0.144 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.021 away. White text reads best on it, at 5.92:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.144) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.54:1 |
| White text | 5.92:1 |
Values
| HEX | #0066B2 |
| RGB | rgb(0, 102, 178) |
| HSL | hsl(206, 100%, 35%) |
| OKLCH | oklch(50.3% 0.144 250.3) |
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 #0066B2 | 5.92:1 | AA | Lc -84.2 | Fine for body text |
| Black text on #0066B2 | 3.54:1 | AA large text | Lc 25.1 | Dividers and decoration only |
| #0066B2 text on white | 5.92:1 | AA | Lc 78.9 | Fine for body text |
| #0066B2 text on black | 3.54:1 | AA large text | Lc -22.9 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF7
oklch(93.5% 0.02 250.4)
-
Step 200
200
#C7DCF2
oklch(88.6% 0.038 249.5)
-
Step 300
300
#9FC5ED
oklch(81% 0.07 250)
-
Step 400
400
#69A5E3
oklch(70.6% 0.111 250.4)
-
Step 500
500
#3B8DDC
oklch(63.1% 0.143 250.5)
-
Step 600
600
#0C76C9
oklch(55.7% 0.154 250.1)
-
Step 700
700 (this color)
#0066B2
oklch(50.3% 0.144 250.3)
-
Step 800
800
#05518D
oklch(42.8% 0.119 250.1)
-
Step 900
900
#124370
oklch(37.6% 0.093 250.4)
-
Step 950
950
#0D2842
oklch(27.1% 0.059 250.2)
#0066B2 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) | #3E6CB5 | 0.042 |
| Deuteranopia (no green cones) | #1E5DB1 | 0.025 |
| Tritanopia (no blue cones) | #007883 | 0.103 |
| Achromatopsia (no color) | #646464 | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0066B2
#0066B2
oklch(50.3% 0.144 250.3)
- #8B5700
#8B5700
oklch(50.3% 0.109 69.9)
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 #0066B2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.021
- French Blue #436BAD ΔE 0.045
- Peacock Blue #016795 ΔE 0.048
- Ocean Blue #03719C ΔE 0.052
- Flat Blue #3C73A8 ΔE 0.057
- Muted Blue #3B719F ΔE 0.059
- Denim Blue #3B5B92 ΔE 0.059
- Nice Blue #107AB0 ΔE 0.060
Use #0066B2 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.