#066C8B
Closest named color: Peacock Blue (#016795). oklch(49.6% 0.094 226.7), rgb(6, 108, 139).
Aa
White text reads best on this color (5.95:1).
About this color
#066C8B is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 50%, its chroma 0.094 and its hue 227°. Its hue sits on the cool side of the wheel. The nearest named color is Peacock Blue (#016795), ΔE 0.025 away. White text reads best on it, at 5.95:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.094) |
| Temperature | cool |
| Nearest name | Peacock Blue (#016795) |
| Black text | 3.52:1 |
| White text | 5.95:1 |
Values
| HEX | #066C8B |
| RGB | rgb(6, 108, 139) |
| HSL | hsl(194, 92%, 28%) |
| OKLCH | oklch(49.6% 0.094 226.7) |
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 #066C8B | 5.95:1 | AA | Lc -84.5 | Fine for body text |
| Black text on #066C8B | 3.52:1 | AA large text | Lc 24.8 | Dividers and decoration only |
| #066C8B text on white | 5.95:1 | AA | Lc 79.3 | Fine for body text |
| #066C8B text on black | 3.52:1 | AA large text | Lc -22.5 | 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
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF1
oklch(93.6% 0.014 226.6)
-
Step 200
200
#C9DDE6
oklch(88.5% 0.025 226.5)
-
Step 300
300
#A3C7D8
oklch(80.9% 0.045 228.2)
-
Step 400
400
#6EAAC4
oklch(70.7% 0.073 227.3)
-
Step 500
500
#4295B5
oklch(63.2% 0.093 226.5)
-
Step 600
600
#187EA1
oklch(55.5% 0.101 227.4)
-
Step 700
700 (this color)
#066C8B
oklch(49.6% 0.094 226.7)
-
Step 800
800
#0D5770
oklch(42.7% 0.078 227.1)
-
Step 900
900
#16485A
oklch(37.7% 0.06 225.9)
-
Step 950
950
#0F2A35
oklch(27% 0.038 227.5)
#066C8B 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) | #5B6A8D | 0.069 |
| Deuteranopia (no green cones) | #4B5F8B | 0.059 |
| Tritanopia (no blue cones) | #007576 | 0.051 |
| Achromatopsia (no color) | #646464 | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #066C8B
#066C8B
oklch(49.6% 0.094 226.7)
- #8D5030
#8D5030
oklch(49.6% 0.094 47.3)
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 #066C8B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Peacock Blue #016795 ΔE 0.025
- Sea Blue #047495 ΔE 0.026
- Ocean Blue #03719C ΔE 0.028
- Denim #3B638C ΔE 0.039
- Ocean #017B92 ΔE 0.045
- Deep Aqua #08787F ΔE 0.047
- Muted Blue #3B719F ΔE 0.049
- Deep Turquoise #017374 ΔE 0.049
Use #066C8B 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.