#1C143F
Closest named color: Dark Indigo (#1F0954). oklch(23% 0.078 287.1), rgb(28, 20, 63).
Aa
White text reads best on this color (17.19:1).
About this color
#1C143F is a very dark, moderately saturated purple. In OKLCH its lightness is 23%, its chroma 0.078 and its hue 287°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Indigo (#1F0954), ΔE 0.044 away. White text reads best on it, at 17.19:1.
| Hue family | Purples |
| Lightness | very dark (23%) |
| Chroma | moderately saturated (0.078) |
| Temperature | cool |
| Nearest name | Dark Indigo (#1F0954) |
| Black text | 1.22:1 |
| White text | 17.19:1 |
Values
| HEX | #1C143F |
| RGB | rgb(28, 20, 63) |
| HSL | hsl(251, 52%, 16%) |
| OKLCH | oklch(23% 0.078 287.1) |
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 #1C143F | 17.19:1 | AAA | Lc -106.3 | Preferred for body text |
| Black text on #1C143F | 1.22:1 | Fails | Lc 0.0 | Not readable |
| #1C143F text on white | 17.19:1 | AAA | Lc 103.9 | Preferred for body text |
| #1C143F text on black | 1.22:1 | 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
#F5F4FE
oklch(97.1% 0.013 290.8)
-
Step 100
100
#E8E8FC
oklch(93.7% 0.027 285.9)
-
Step 200
200
#D6D5FA
oklch(88.6% 0.051 286.6)
-
Step 300
300
#BCB8FA
oklch(80.9% 0.093 286.9)
-
Step 400
400
#9C90F8
oklch(70.8% 0.149 287.2)
-
Step 500
500
#8670F4
oklch(63.1% 0.19 287.3)
-
Step 600
600
#7154E3
oklch(55.6% 0.207 287)
-
Step 700
700
#5F43C5
oklch(49.1% 0.192 286.9)
-
Step 800
800
#4D389F
oklch(42.6% 0.159 287)
-
Step 900
900
#40327F
oklch(37.7% 0.125 287.2)
-
Step 950
950 (this color)
#1C143F
oklch(23% 0.078 287.1)
#1C143F 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) | #001C40 | 0.042 |
| Deuteranopia (no green cones) | #001A3E | 0.042 |
| Tritanopia (no blue cones) | #101E27 | 0.065 |
| Achromatopsia (no color) | #1B1B1B | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C143F
#1C143F
oklch(23% 0.078 287.1)
- #201E00
#201E00
oklch(23% 0.049 106.1)
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 #1C143F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Indigo #1F0954 ΔE 0.044
- Navy Blue #001146 ΔE 0.049
- Midnight Purple #280137 ΔE 0.052
- Rich Black #0D1B2A ΔE 0.055
- Very Dark Purple #2A0134 ΔE 0.056
- Oxford Blue #1B263B ΔE 0.059
- Dark Purple #35063E ΔE 0.060
- Dark #1B2431 ΔE 0.063
Use #1C143F 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.