#066EA1
Closest named color: Ocean Blue (#03719C). oklch(51.3% 0.115 239.4), rgb(6, 110, 161).
Aa
White text reads best on this color (5.59:1).
About this color
#066EA1 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.115 and its hue 239°. Its hue sits on the cool side of the wheel. The nearest named color is Ocean Blue (#03719C), ΔE 0.013 away. White text reads best on it, at 5.59:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.115) |
| Temperature | cool |
| Nearest name | Ocean Blue (#03719C) |
| Black text | 3.75:1 |
| White text | 5.59:1 |
Values
| HEX | #066EA1 |
| RGB | rgb(6, 110, 161) |
| HSL | hsl(200, 93%, 33%) |
| OKLCH | oklch(51.3% 0.115 239.4) |
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 #066EA1 | 5.59:1 | AA | Lc -82.7 | Fine for body text |
| Black text on #066EA1 | 3.75:1 | AA large text | Lc 26.7 | Dividers and decoration only |
| #066EA1 text on white | 5.59:1 | AA | Lc 77.4 | Fine for body text |
| #066EA1 text on black | 3.75:1 | AA large text | Lc -24.4 | 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
#E1ECF4
oklch(93.7% 0.016 239.1)
-
Step 200
200
#C8DCEC
oklch(88.4% 0.031 242)
-
Step 300
300
#A1C6E1
oklch(80.9% 0.055 240)
-
Step 400
400
#6BA8D2
oklch(70.6% 0.088 239.8)
-
Step 500
500
#3D92C6
oklch(63.1% 0.113 239.1)
-
Step 600
600
#0C7BB3
oklch(55.5% 0.123 239.5)
-
Step 700
700 (this color)
#066EA1
oklch(51.3% 0.115 239.4)
-
Step 800
800
#05557D
oklch(42.8% 0.094 239.2)
-
Step 900
900
#134664
oklch(37.6% 0.073 239.3)
-
Step 950
950
#0D293B
oklch(26.9% 0.047 240.1)
#066EA1 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) | #556FA3 | 0.059 |
| Deuteranopia (no green cones) | #4162A0 | 0.046 |
| Tritanopia (no blue cones) | #007B80 | 0.075 |
| Achromatopsia (no color) | #686868 | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #066EA1
#066EA1
oklch(51.3% 0.115 239.4)
- #965410
#965410
oklch(51.3% 0.115 59.2)
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 #066EA1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean Blue #03719C ΔE 0.013
- Peacock Blue #016795 ΔE 0.026
- Sea Blue #047495 ΔE 0.030
- Muted Blue #3B719F ΔE 0.032
- Mid Blue #276AB3 ΔE 0.036
- Flat Blue #3C73A8 ΔE 0.037
- Nice Blue #107AB0 ΔE 0.039
- French Blue #436BAD ΔE 0.044
Use #066EA1 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.