#166B90
Closest named color: Peacock Blue (#016795). oklch(49.8% 0.095 233.1), rgb(22, 107, 144).
Aa
White text reads best on this color (5.93:1).
About this color
#166B90 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 50%, its chroma 0.095 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Peacock Blue (#016795), ΔE 0.018 away. White text reads best on it, at 5.93:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.095) |
| Temperature | cool |
| Nearest name | Peacock Blue (#016795) |
| Black text | 3.53:1 |
| White text | 5.93:1 |
Values
| HEX | #166B90 |
| RGB | rgb(22, 107, 144) |
| HSL | hsl(198, 73%, 33%) |
| OKLCH | oklch(49.8% 0.095 233.1) |
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 #166B90 | 5.93:1 | AA | Lc -84.5 | Fine for body text |
| Black text on #166B90 | 3.53:1 | AA large text | Lc 24.8 | Dividers and decoration only |
| #166B90 text on white | 5.93:1 | AA | Lc 79.3 | Fine for body text |
| #166B90 text on black | 3.53:1 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2ECF1
oklch(93.7% 0.013 228.9)
-
Step 200
200
#C9DCE8
oklch(88.4% 0.026 235.4)
-
Step 300
300
#A4C6DA
oklch(80.8% 0.046 233.9)
-
Step 400
400
#71A9C8
oklch(70.8% 0.074 233.5)
-
Step 500
500
#4793B9
oklch(63.1% 0.094 232.7)
-
Step 600
600
#237DA6
oklch(55.7% 0.103 233.2)
-
Step 700
700 (this color)
#166B90
oklch(49.8% 0.095 233.1)
-
Step 800
800
#155673
oklch(42.8% 0.079 232.7)
-
Step 900
900
#1A475D
oklch(37.7% 0.061 233)
-
Step 950
950
#112A36
oklch(27.1% 0.038 231.3)
#166B90 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) | #596A92 | 0.061 |
| Deuteranopia (no green cones) | #495F8F | 0.051 |
| Tritanopia (no blue cones) | #007578 | 0.057 |
| Achromatopsia (no color) | #646464 | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #166B90
#166B90
oklch(49.8% 0.095 233.1)
- #8C5229
#8C5229
oklch(49.8% 0.095 53.8)
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 #166B90, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Peacock Blue #016795 ΔE 0.018
- Ocean Blue #03719C ΔE 0.023
- Sea Blue #047495 ΔE 0.026
- Denim #3B638C ΔE 0.032
- Muted Blue #3B719F ΔE 0.041
- Ocean #017B92 ΔE 0.048
- Light Navy Blue #2E5A88 ΔE 0.049
- Dusky Blue #475F94 ΔE 0.051
Use #166B90 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.