#166799
Closest named color: Peacock Blue (#016795). oklch(49.3% 0.108 242.2), rgb(22, 103, 153).
Aa
White text reads best on this color (6.11:1).
About this color
#166799 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 49%, its chroma 0.108 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Peacock Blue (#016795), ΔE 0.010 away. White text reads best on it, at 6.11:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Peacock Blue (#016795) |
| Black text | 3.43:1 |
| White text | 6.11:1 |
Values
| HEX | #166799 |
| RGB | rgb(22, 103, 153) |
| HSL | hsl(203, 75%, 34%) |
| OKLCH | oklch(49.3% 0.108 242.2) |
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 #166799 | 6.11:1 | AA | Lc -85.3 | Fine for body text |
| Black text on #166799 | 3.43:1 | AA large text | Lc 24.0 | Dividers and decoration only |
| #166799 text on white | 6.11:1 | AA | Lc 80.1 | Fine for body text |
| #166799 text on black | 3.43:1 | AA large text | Lc -21.7 | 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
#E1EBF3
oklch(93.5% 0.015 241.8)
-
Step 200
200
#C9DCEB
oklch(88.5% 0.029 241.6)
-
Step 300
300
#A4C5E0
oklch(80.8% 0.052 243.1)
-
Step 400
400
#71A7D1
oklch(70.7% 0.084 242.8)
-
Step 500
500
#4891C5
oklch(63.2% 0.107 242.1)
-
Step 600
600
#247AB1
oklch(55.6% 0.116 242)
-
Step 700
700 (this color)
#166799
oklch(49.3% 0.108 242.2)
-
Step 800
800
#16547C
oklch(42.8% 0.09 242.2)
-
Step 900
900
#1A4563
oklch(37.5% 0.07 242.4)
-
Step 950
950
#11293A
oklch(27% 0.044 241.7)
#166799 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) | #4F689B | 0.050 |
| Deuteranopia (no green cones) | #3D5D98 | 0.038 |
| Tritanopia (no blue cones) | #007379 | 0.072 |
| Achromatopsia (no color) | #626262 | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #166799
#166799
oklch(49.3% 0.108 242.2)
- #8C510C
#8C510C
oklch(49.3% 0.108 62.2)
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 #166799, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Peacock Blue #016795 ΔE 0.010
- Ocean Blue #03719C ΔE 0.029
- Denim #3B638C ΔE 0.031
- Denim Blue #3B5B92 ΔE 0.040
- Sea Blue #047495 ΔE 0.041
- Light Navy Blue #2E5A88 ΔE 0.042
- Dusky Blue #475F94 ΔE 0.043
- Muted Blue #3B719F ΔE 0.043
Use #166799 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.