#166391
Closest named color: Peacock Blue (#016795). oklch(47.8% 0.102 241.2), rgb(22, 99, 145).
Aa
White text reads best on this color (6.50:1).
About this color
#166391 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 48%, its chroma 0.102 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is Peacock Blue (#016795), ΔE 0.012 away. White text reads best on it, at 6.50:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.102) |
| Temperature | cool |
| Nearest name | Peacock Blue (#016795) |
| Black text | 3.22:1 |
| White text | 6.50:1 |
Values
| HEX | #166391 |
| RGB | rgb(22, 99, 145) |
| HSL | hsl(202, 74%, 33%) |
| OKLCH | oklch(47.8% 0.102 241.2) |
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 #166391 | 6.50:1 | AA | Lc -86.9 | Fine for body text |
| Black text on #166391 | 3.22:1 | AA large text | Lc 22.2 | Dividers and decoration only |
| #166391 text on white | 6.50:1 | AA | Lc 81.9 | Fine for body text |
| #166391 text on black | 3.22:1 | AA large text | Lc -20.0 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF3
oklch(93.6% 0.015 244.7)
-
Step 200
200
#CADCEA
oklch(88.5% 0.027 241.2)
-
Step 300
300
#A5C5DE
oklch(80.8% 0.049 241.8)
-
Step 400
400
#73A7CE
oklch(70.7% 0.08 241.7)
-
Step 500
500
#4B91C1
oklch(63.1% 0.101 240.9)
-
Step 600
600
#2A7AAD
oklch(55.5% 0.11 241.1)
-
Step 700
700 (this color)
#166391
oklch(47.8% 0.102 241.2)
-
Step 800
800
#1A5479
oklch(42.7% 0.085 241.2)
-
Step 900
900
#1D4661
oklch(37.8% 0.065 240.4)
-
Step 950
950
#122939
oklch(27% 0.042 241)
#166391 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) | #4D6493 | 0.050 |
| Deuteranopia (no green cones) | #3C5990 | 0.038 |
| Tritanopia (no blue cones) | #006E73 | 0.068 |
| Achromatopsia (no color) | #5E5E5E | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #166391
#166391
oklch(47.8% 0.102 241.2)
- #864E12
#864E12
oklch(48% 0.102 61.4)
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 #166391, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Peacock Blue #016795 ΔE 0.012
- Denim #3B638C ΔE 0.028
- Light Navy Blue #2E5A88 ΔE 0.029
- Denim Blue #3B5B92 ΔE 0.034
- Ocean Blue #03719C ΔE 0.041
- Dusky Blue #475F94 ΔE 0.043
- Dusk Blue #26538D ΔE 0.046
- Sea Blue #047495 ΔE 0.050
Use #166391 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.