#1C1747
Closest named color: Dark Indigo (#1F0954). oklch(24.4% 0.086 282.6), rgb(28, 23, 71).
Aa
White text reads best on this color (16.62:1).
About this color
#1C1747 is a very dark, moderately saturated purple. In OKLCH its lightness is 24%, its chroma 0.086 and its hue 283°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Indigo (#1F0954), ΔE 0.036 away. White text reads best on it, at 16.62:1.
| Hue family | Purples |
| Lightness | very dark (24%) |
| Chroma | moderately saturated (0.086) |
| Temperature | cool |
| Nearest name | Dark Indigo (#1F0954) |
| Black text | 1.26:1 |
| White text | 16.62:1 |
Values
| HEX | #1C1747 |
| RGB | rgb(28, 23, 71) |
| HSL | hsl(246, 51%, 18%) |
| OKLCH | oklch(24.4% 0.086 282.6) |
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 #1C1747 | 16.62:1 | AAA | Lc -105.8 | Preferred for body text |
| Black text on #1C1747 | 1.26:1 | Fails | Lc 0.0 | Not readable |
| #1C1747 text on white | 16.62:1 | AAA | Lc 103.3 | Preferred for body text |
| #1C1747 text on black | 1.26:1 | 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
#F4F5FF
oklch(97.2% 0.013 281.6)
-
Step 100
100
#E6E8FE
oklch(93.6% 0.03 281.7)
-
Step 200
200
#D3D5FE
oklch(88.5% 0.056 283)
-
Step 300
300
#B7B9FF
oklch(80.9% 0.098 282.7)
-
Step 400
400
#9491FF
oklch(70.7% 0.158 282.8)
-
Step 500
500
#7C70FF
oklch(63.1% 0.205 282.6)
-
Step 600
600
#6851F1
oklch(55.5% 0.228 282.6)
-
Step 700
700
#5740D2
oklch(49.1% 0.212 282.4)
-
Step 800
800
#4736A9
oklch(42.6% 0.175 282.8)
-
Step 900
900
#3B3186
oklch(37.7% 0.137 283)
-
Step 950
950 (this color)
#1C1747
oklch(24.4% 0.086 282.6)
#1C1747 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) | #002049 | 0.040 |
| Deuteranopia (no green cones) | #001D46 | 0.038 |
| Tritanopia (no blue cones) | #09222C | 0.072 |
| Achromatopsia (no color) | #1E1E1E | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C1747
#1C1747
oklch(24.4% 0.086 282.6)
- #252100
#252100
oklch(24.5% 0.051 102.9)
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 #1C1747, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Indigo #1F0954 ΔE 0.036
- Navy Blue #001146 ΔE 0.049
- Oxford Blue #1B263B ΔE 0.055
- Midnight Purple #280137 ΔE 0.063
- Dark #1B2431 ΔE 0.064
- Rich Black #0D1B2A ΔE 0.064
- Dark Purple #35063E ΔE 0.064
- Very Dark Purple #2A0134 ΔE 0.068
Use #1C1747 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.