#1663AA
Closest named color: Mid Blue (#276AB3). oklch(49.4% 0.134 251.5), rgb(22, 99, 170).
Aa
White text reads best on this color (6.17:1).
About this color
#1663AA is a medium-dark, moderately saturated blue. In OKLCH its lightness is 49%, its chroma 0.134 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.027 away. White text reads best on it, at 6.17:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.134) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.39:1 |
| White text | 6.17:1 |
Values
| HEX | #1663AA |
| RGB | rgb(22, 99, 170) |
| HSL | hsl(209, 77%, 38%) |
| OKLCH | oklch(49.4% 0.134 251.5) |
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 #1663AA | 6.17:1 | AA | Lc -85.5 | Fine for body text |
| Black text on #1663AA | 3.39:1 | AA large text | Lc 23.7 | Dividers and decoration only |
| #1663AA text on white | 6.17:1 | AA | Lc 80.3 | Fine for body text |
| #1663AA text on black | 3.39:1 | AA large text | Lc -21.5 | 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
#C8DBF1
oklch(88.4% 0.037 252.1)
-
Step 300
300
#A3C4EA
oklch(80.9% 0.065 252.2)
-
Step 400
400
#6FA5DF
oklch(70.8% 0.103 251.1)
-
Step 500
500
#468DD6
oklch(63.1% 0.132 251.2)
-
Step 600
600
#2475C4
oklch(55.5% 0.144 251.8)
-
Step 700
700 (this color)
#1663AA
oklch(49.4% 0.134 251.5)
-
Step 800
800
#155089
oklch(42.6% 0.111 251.8)
-
Step 900
900
#1A436E
oklch(37.7% 0.087 252.1)
-
Step 950
950
#102840
oklch(27.1% 0.054 250.5)
#1663AA 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) | #3F68AD | 0.037 |
| Deuteranopia (no green cones) | #255BA9 | 0.022 |
| Tritanopia (no blue cones) | #00747E | 0.098 |
| Achromatopsia (no color) | #616161 | 0.134 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1663AA
#1663AA
oklch(49.4% 0.134 251.5)
- #865600
#865600
oklch(49.5% 0.106 72.1)
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 #1663AA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.027
- Peacock Blue #016795 ΔE 0.039
- French Blue #436BAD ΔE 0.045
- Denim Blue #3B5B92 ΔE 0.046
- Dusky Blue #475F94 ΔE 0.050
- Ocean Blue #03719C ΔE 0.051
- Denim #3B638C ΔE 0.054
- Light Navy Blue #2E5A88 ΔE 0.056
Use #1663AA 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.