#166F93
Closest named color: Ocean Blue (#03719C). oklch(51% 0.096 231.4), rgb(22, 111, 147).
Aa
White text reads best on this color (5.63:1).
About this color
#166F93 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.096 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is Ocean Blue (#03719C), ΔE 0.014 away. White text reads best on it, at 5.63:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Ocean Blue (#03719C) |
| Black text | 3.72:1 |
| White text | 5.63:1 |
Values
| HEX | #166F93 |
| RGB | rgb(22, 111, 147) |
| HSL | hsl(197, 74%, 33%) |
| OKLCH | oklch(51% 0.096 231.4) |
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 #166F93 | 5.63:1 | AA | Lc -83.0 | Fine for body text |
| Black text on #166F93 | 3.72:1 | AA large text | Lc 26.3 | Dividers and decoration only |
| #166F93 text on white | 5.63:1 | AA | Lc 77.7 | Fine for body text |
| #166F93 text on black | 3.72:1 | AA large text | Lc -24.0 | 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
#C9DDE7
oklch(88.6% 0.025 229.2)
-
Step 300
300
#A3C7DA
oklch(81% 0.047 231.1)
-
Step 400
400
#6FA9C7
oklch(70.6% 0.075 231.8)
-
Step 500
500
#4594B9
oklch(63.2% 0.095 231.2)
-
Step 600
600
#1D7DA5
oklch(55.5% 0.104 231.7)
-
Step 700
700 (this color)
#166F93
oklch(51% 0.096 231.4)
-
Step 800
800
#115673
oklch(42.7% 0.08 231.9)
-
Step 900
900
#18475D
oklch(37.7% 0.063 232.2)
-
Step 950
950
#102A36
oklch(27.1% 0.039 230.5)
#166F93 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) | #5D6E95 | 0.064 |
| Deuteranopia (no green cones) | #4D6292 | 0.055 |
| Tritanopia (no blue cones) | #00797B | 0.057 |
| Achromatopsia (no color) | #676767 | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #166F93
#166F93
oklch(51% 0.096 231.4)
- #91542E
#91542E
oklch(50.9% 0.097 51)
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 #166F93, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean Blue #03719C ΔE 0.014
- Sea Blue #047495 ΔE 0.015
- Peacock Blue #016795 ΔE 0.027
- Muted Blue #3B719F ΔE 0.034
- Ocean #017B92 ΔE 0.037
- Denim #3B638C ΔE 0.039
- Flat Blue #3C73A8 ΔE 0.045
- Dull Blue #49759C ΔE 0.047
Use #166F93 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.