#1C1742
Closest named color: Dark Indigo (#1F0954). oklch(23.9% 0.078 284), rgb(28, 23, 66).
Aa
White text reads best on this color (16.79:1).
About this color
#1C1742 is a very dark, moderately saturated purple. In OKLCH its lightness is 24%, its chroma 0.078 and its hue 284°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Indigo (#1F0954), ΔE 0.043 away. White text reads best on it, at 16.79:1.
| Hue family | Purples |
| Lightness | very dark (24%) |
| Chroma | moderately saturated (0.078) |
| Temperature | cool |
| Nearest name | Dark Indigo (#1F0954) |
| Black text | 1.25:1 |
| White text | 16.79:1 |
Values
| HEX | #1C1742 |
| RGB | rgb(28, 23, 66) |
| HSL | hsl(247, 48%, 17%) |
| OKLCH | oklch(23.9% 0.078 284) |
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 #1C1742 | 16.79:1 | AAA | Lc -106.0 | Preferred for body text |
| Black text on #1C1742 | 1.25:1 | Fails | Lc 0.0 | Not readable |
| #1C1742 text on white | 16.79:1 | AAA | Lc 103.5 | Preferred for body text |
| #1C1742 text on black | 1.25:1 | 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
#F4F5FE
oklch(97.2% 0.012 281.1)
-
Step 100
100
#E7E8FC
oklch(93.6% 0.027 283.6)
-
Step 200
200
#D4D5FB
oklch(88.4% 0.052 284.1)
-
Step 300
300
#B9B9FB
oklch(80.9% 0.093 284.1)
-
Step 400
400
#9692F9
oklch(70.7% 0.148 283.7)
-
Step 500
500
#7F72F6
oklch(63% 0.191 284)
-
Step 600
600
#6B56E5
oklch(55.6% 0.207 284.1)
-
Step 700
700
#5A45C7
oklch(49.1% 0.192 284.1)
-
Step 800
800
#493AA1
oklch(42.7% 0.159 284)
-
Step 900
900
#3C3380
oklch(37.6% 0.125 283.9)
-
Step 950
950 (this color)
#1C1742
oklch(23.9% 0.078 284)
#1C1742 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) | #001F43 | 0.040 |
| Deuteranopia (no green cones) | #001C41 | 0.039 |
| Tritanopia (no blue cones) | #0D2129 | 0.067 |
| Achromatopsia (no color) | #1D1D1D | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C1742
#1C1742
oklch(23.9% 0.078 284)
- #232000
#232000
oklch(23.9% 0.051 104.5)
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 #1C1742, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Indigo #1F0954 ΔE 0.043
- Navy Blue #001146 ΔE 0.050
- Oxford Blue #1B263B ΔE 0.052
- Rich Black #0D1B2A ΔE 0.056
- Dark #1B2431 ΔE 0.058
- Midnight Purple #280137 ΔE 0.059
- Dark Purple #35063E ΔE 0.063
- Very Dark Purple #2A0134 ΔE 0.063
Use #1C1742 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.