#1066AC
Closest named color: Mid Blue (#276AB3). oklch(50.1% 0.134 249.8), rgb(16, 102, 172).
Aa
White text reads best on this color (5.96:1).
About this color
#1066AC is a medium-dark, moderately saturated blue. In OKLCH its lightness is 50%, its chroma 0.134 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 5.96:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.134) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.51:1 |
| White text | 5.96:1 |
Values
| HEX | #1066AC |
| RGB | rgb(16, 102, 172) |
| HSL | hsl(207, 83%, 37%) |
| OKLCH | oklch(50.1% 0.134 249.8) |
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 #1066AC | 5.96:1 | AA | Lc -84.5 | Fine for body text |
| Black text on #1066AC | 3.51:1 | AA large text | Lc 24.8 | Dividers and decoration only |
| #1066AC text on white | 5.96:1 | AA | Lc 79.3 | Fine for body text |
| #1066AC text on black | 3.51:1 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF6
oklch(93.6% 0.018 250.6)
-
Step 200
200
#C8DCF1
oklch(88.6% 0.036 249.5)
-
Step 300
300
#A1C5EA
oklch(81% 0.065 249.3)
-
Step 400
400
#6DA5DF
oklch(70.7% 0.104 250.3)
-
Step 500
500
#428ED6
oklch(63.2% 0.132 249.6)
-
Step 600
600
#1B76C3
oklch(55.5% 0.144 249.8)
-
Step 700
700 (this color)
#1066AC
oklch(50.1% 0.134 249.8)
-
Step 800
800
#0F5189
oklch(42.7% 0.112 250)
-
Step 900
900
#17446D
oklch(37.8% 0.086 249.5)
-
Step 950
950
#0F2840
oklch(27% 0.055 249.7)
#1066AC 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) | #436BAF | 0.042 |
| Deuteranopia (no green cones) | #295DAB | 0.026 |
| Tritanopia (no blue cones) | #007780 | 0.098 |
| Achromatopsia (no color) | #636363 | 0.134 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1066AC
#1066AC
oklch(50.1% 0.134 249.8)
- #8A5600
#8A5600
oklch(50% 0.109 69.6)
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 #1066AC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.021
- Peacock Blue #016795 ΔE 0.039
- French Blue #436BAD ΔE 0.041
- Ocean Blue #03719C ΔE 0.045
- Denim Blue #3B5B92 ΔE 0.051
- Muted Blue #3B719F ΔE 0.052
- Flat Blue #3C73A8 ΔE 0.052
- Dusky Blue #475F94 ΔE 0.053
Use #1066AC 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.