#1663A5
Closest named color: Mid Blue (#276AB3). oklch(49% 0.127 250), rgb(22, 99, 165).
Aa
White text reads best on this color (6.24:1).
About this color
#1663A5 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 49%, its chroma 0.127 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.031 away. White text reads best on it, at 6.24:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.127) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.36:1 |
| White text | 6.24:1 |
Values
| HEX | #1663A5 |
| RGB | rgb(22, 99, 165) |
| HSL | hsl(208, 76%, 37%) |
| OKLCH | oklch(49% 0.127 250) |
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 #1663A5 | 6.24:1 | AA | Lc -85.8 | Fine for body text |
| Black text on #1663A5 | 3.36:1 | AA large text | Lc 23.4 | Dividers and decoration only |
| #1663A5 text on white | 6.24:1 | AA | Lc 80.6 | Fine for body text |
| #1663A5 text on black | 3.36:1 | AA large text | Lc -21.2 | 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
#C9DBEF
oklch(88.4% 0.034 251)
-
Step 300
300
#A3C4E7
oklch(80.8% 0.061 250.1)
-
Step 400
400
#70A5DC
oklch(70.7% 0.099 250.2)
-
Step 500
500
#478ED2
oklch(63.2% 0.125 249.6)
-
Step 600
600
#2576BF
oklch(55.5% 0.137 250.1)
-
Step 700
700 (this color)
#1663A5
oklch(49% 0.127 250)
-
Step 800
800
#165186
oklch(42.7% 0.106 250.1)
-
Step 900
900
#1A446B
oklch(37.8% 0.082 249.5)
-
Step 950
950
#11283F
oklch(27.1% 0.052 250.3)
#1663A5 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) | #4367A8 | 0.040 |
| Deuteranopia (no green cones) | #2B5BA4 | 0.024 |
| Tritanopia (no blue cones) | #00737C | 0.092 |
| Achromatopsia (no color) | #606060 | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1663A5
#1663A5
oklch(49% 0.127 250)
- #865400
#865400
oklch(49.1% 0.106 70.2)
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 #1663A5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.031
- Peacock Blue #016795 ΔE 0.032
- Denim Blue #3B5B92 ΔE 0.040
- Dusky Blue #475F94 ΔE 0.046
- Ocean Blue #03719C ΔE 0.046
- French Blue #436BAD ΔE 0.047
- Denim #3B638C ΔE 0.047
- Light Navy Blue #2E5A88 ΔE 0.049
Use #1663A5 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.