#1C1663
Closest named color: Midnight Blue (#191970). oklch(27.1% 0.129 276.9), rgb(28, 22, 99).
Aa
White text reads best on this color (15.62:1).
About this color
#1C1663 is a dark, moderately saturated blue. In OKLCH its lightness is 27%, its chroma 0.129 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Blue (#191970), ΔE 0.025 away. White text reads best on it, at 15.62:1.
| Hue family | Blues |
| Lightness | dark (27%) |
| Chroma | moderately saturated (0.129) |
| Temperature | cool |
| Nearest name | Midnight Blue (#191970) |
| Black text | 1.34:1 |
| White text | 15.62:1 |
Values
| HEX | #1C1663 |
| RGB | rgb(28, 22, 99) |
| HSL | hsl(245, 64%, 24%) |
| OKLCH | oklch(27.1% 0.129 276.9) |
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 #1C1663 | 15.62:1 | AAA | Lc -104.8 | Preferred for body text |
| Black text on #1C1663 | 1.34:1 | Fails | Lc 0.0 | Not readable |
| #1C1663 text on white | 15.62:1 | AAA | Lc 102.0 | Preferred for body text |
| #1C1663 text on black | 1.34:1 | Fails | Lc 0.0 | Not readable |
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 950.
-
Step 50
50
#F3F5FF
oklch(97.2% 0.013 277.1)
-
Step 100
100
#E4E9FF
oklch(93.7% 0.03 275.6)
-
Step 200
200
#CFD7FF
oklch(88.6% 0.056 276.3)
-
Step 300
300
#B0BBFF
oklch(80.8% 0.097 276.9)
-
Step 400
400
#8995FF
oklch(70.7% 0.154 276.8)
-
Step 500
500
#6F76FF
oklch(63.2% 0.2 276.8)
-
Step 600
600
#5950FF
oklch(55.5% 0.248 276.9)
-
Step 700
700
#4C19FF
oklch(49.1% 0.291 276.8)
-
Step 800
800
#3E07D8
oklch(42.7% 0.261 276.8)
-
Step 900
900
#321EA9
oklch(37.7% 0.203 276.9)
-
Step 950
950 (this color)
#1C1663
oklch(27.1% 0.129 276.9)
#1C1663 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) | #002765 | 0.045 |
| Deuteranopia (no green cones) | #002062 | 0.034 |
| Tritanopia (no blue cones) | #002C3B | 0.103 |
| Achromatopsia (no color) | #232323 | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C1663
#1C1663
oklch(27.1% 0.129 276.9)
- #2E2600
#2E2600
oklch(27% 0.056 97.1)
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 #1C1663, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Blue #191970 ΔE 0.025
- Dark Indigo #1F0954 ΔE 0.038
- Darkblue #030764 ΔE 0.048
- Dark Royal Blue #02066F ΔE 0.051
- Deep Blue #040273 ΔE 0.054
- Marine #042E60 ΔE 0.062
- Navy #000080 ΔE 0.069
- Navy Blue #001146 ΔE 0.072
Use #1C1663 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.