#066B98
Closest named color: Peacock Blue (#016795). oklch(50% 0.107 236.8), rgb(6, 107, 152).
Aa
White text reads best on this color (5.89:1).
About this color
#066B98 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 50%, its chroma 0.107 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Peacock Blue (#016795), ΔE 0.013 away. White text reads best on it, at 5.89:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.107) |
| Temperature | cool |
| Nearest name | Peacock Blue (#016795) |
| Black text | 3.56:1 |
| White text | 5.89:1 |
Values
| HEX | #066B98 |
| RGB | rgb(6, 107, 152) |
| HSL | hsl(198, 92%, 31%) |
| OKLCH | oklch(50% 0.107 236.8) |
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 #066B98 | 5.89:1 | AA | Lc -84.2 | Fine for body text |
| Black text on #066B98 | 3.56:1 | AA large text | Lc 25.1 | Dividers and decoration only |
| #066B98 text on white | 5.89:1 | AA | Lc 78.9 | Fine for body text |
| #066B98 text on black | 3.56:1 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1ECF3
oklch(93.7% 0.015 235.4)
-
Step 200
200
#C8DDEA
oklch(88.6% 0.029 234.9)
-
Step 300
300
#A2C6DE
oklch(80.8% 0.051 237.5)
-
Step 400
400
#6DA9CE
oklch(70.8% 0.083 236.7)
-
Step 500
500
#4093C1
oklch(63.2% 0.106 236.2)
-
Step 600
600
#157CAE
oklch(55.6% 0.115 237)
-
Step 700
700 (this color)
#066B98
oklch(50% 0.107 236.8)
-
Step 800
800
#0A5579
oklch(42.6% 0.089 237)
-
Step 900
900
#154761
oklch(37.8% 0.068 235.7)
-
Step 950
950
#0E2939
oklch(26.8% 0.044 237.6)
#066B98 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) | #556B9A | 0.060 |
| Deuteranopia (no green cones) | #435F97 | 0.049 |
| Tritanopia (no blue cones) | #00777B | 0.068 |
| Achromatopsia (no color) | #646464 | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #066B98
#066B98
oklch(50% 0.107 236.8)
- #90511A
#90511A
oklch(50% 0.107 56.9)
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 #066B98, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Peacock Blue #016795 ΔE 0.013
- Ocean Blue #03719C ΔE 0.018
- Sea Blue #047495 ΔE 0.029
- Denim #3B638C ΔE 0.036
- Muted Blue #3B719F ΔE 0.039
- Mid Blue #276AB3 ΔE 0.048
- Flat Blue #3C73A8 ΔE 0.048
- Denim Blue #3B5B92 ΔE 0.051
Use #066B98 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.