#1C153C
Closest named color: Rich Black (#0D1B2A). oklch(22.9% 0.072 287.6), rgb(28, 21, 60).
Aa
White text reads best on this color (17.18:1).
About this color
#1C153C is a very dark, moderately saturated purple. In OKLCH its lightness is 23%, its chroma 0.072 and its hue 288°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.050 away. White text reads best on it, at 17.18:1.
| Hue family | Purples |
| Lightness | very dark (23%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.22:1 |
| White text | 17.18:1 |
Values
| HEX | #1C153C |
| RGB | rgb(28, 21, 60) |
| HSL | hsl(251, 48%, 16%) |
| OKLCH | oklch(22.9% 0.072 287.6) |
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 #1C153C | 17.18:1 | AAA | Lc -106.3 | Preferred for body text |
| Black text on #1C153C | 1.22:1 | Fails | Lc 0.0 | Not readable |
| #1C153C text on white | 17.18:1 | AAA | Lc 103.9 | Preferred for body text |
| #1C153C 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
#F5F4FD
oklch(97% 0.012 291.3)
-
Step 100
100
#E8E8FA
oklch(93.6% 0.024 285.9)
-
Step 200
200
#D7D5F8
oklch(88.6% 0.048 288)
-
Step 300
300
#BDB9F5
oklch(81% 0.084 287.4)
-
Step 400
400
#9C92F0
oklch(70.7% 0.135 287.3)
-
Step 500
500
#8673EB
oklch(63% 0.174 287.6)
-
Step 600
600
#7258DA
oklch(55.6% 0.19 287.8)
-
Step 700
700
#5F47BD
oklch(49% 0.177 287.4)
-
Step 800
800
#4E3B99
oklch(42.7% 0.147 287.8)
-
Step 900
900
#403479
oklch(37.7% 0.113 287.7)
-
Step 950
950 (this color)
#1C153C
oklch(22.9% 0.072 287.6)
#1C153C 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) | #011C3D | 0.041 |
| Deuteranopia (no green cones) | #011A3B | 0.040 |
| Tritanopia (no blue cones) | #121E26 | 0.060 |
| Achromatopsia (no color) | #1B1B1B | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C153C
#1C153C
oklch(22.9% 0.072 287.6)
- #1F1E00
#1F1E00
oklch(22.9% 0.049 108)
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 #1C153C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.050
- Dark Indigo #1F0954 ΔE 0.051
- Navy Blue #001146 ΔE 0.052
- Midnight Purple #280137 ΔE 0.053
- Oxford Blue #1B263B ΔE 0.055
- Very Dark Purple #2A0134 ΔE 0.056
- Dark #1B2431 ΔE 0.057
- Dark Purple #35063E ΔE 0.061
Use #1C153C 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.