#066EA9
Closest named color: Ocean Blue (#03719C). oklch(51.7% 0.124 243.2), rgb(6, 110, 169).
Aa
White text reads best on this color (5.51:1).
About this color
#066EA9 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 52%, its chroma 0.124 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Ocean Blue (#03719C), ΔE 0.025 away. White text reads best on it, at 5.51:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.124) |
| Temperature | cool |
| Nearest name | Ocean Blue (#03719C) |
| Black text | 3.81:1 |
| White text | 5.51:1 |
Values
| HEX | #066EA9 |
| RGB | rgb(6, 110, 169) |
| HSL | hsl(202, 93%, 34%) |
| OKLCH | oklch(51.7% 0.124 243.2) |
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 #066EA9 | 5.51:1 | AA | Lc -82.3 | Fine for body text |
| Black text on #066EA9 | 3.81:1 | AA large text | Lc 27.1 | Dividers and decoration only |
| #066EA9 text on white | 5.51:1 | AA | Lc 76.9 | Fine for body text |
| #066EA9 text on black | 3.81:1 | AA large text | Lc -24.8 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E0ECF5
oklch(93.7% 0.018 240)
-
Step 200
200
#C7DCEE
oklch(88.4% 0.034 244)
-
Step 300
300
#A0C6E5
oklch(81% 0.06 243.2)
-
Step 400
400
#6AA7D8
oklch(70.6% 0.096 244)
-
Step 500
500
#3B91CD
oklch(63.2% 0.122 242.7)
-
Step 600
600
#077ABA
oklch(55.7% 0.132 242.9)
-
Step 700
700 (this color)
#066EA9
oklch(51.7% 0.124 243.2)
-
Step 800
800
#035482
oklch(42.8% 0.102 242.8)
-
Step 900
900
#124568
oklch(37.6% 0.08 243.5)
-
Step 950
950
#0D293D
oklch(27% 0.05 242.9)
#066EA9 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) | #5170AB | 0.054 |
| Deuteranopia (no green cones) | #3B63A8 | 0.039 |
| Tritanopia (no blue cones) | #007D83 | 0.086 |
| Achromatopsia (no color) | #696969 | 0.124 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #066EA9
#066EA9
oklch(51.7% 0.124 243.2)
- #965600
#965600
oklch(51.6% 0.118 63.1)
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 #066EA9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean Blue #03719C ΔE 0.025
- Mid Blue #276AB3 ΔE 0.025
- Muted Blue #3B719F ΔE 0.035
- Flat Blue #3C73A8 ΔE 0.035
- Peacock Blue #016795 ΔE 0.035
- Nice Blue #107AB0 ΔE 0.036
- French Blue #436BAD ΔE 0.038
- Sea Blue #047495 ΔE 0.041
Use #066EA9 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.