#18152C
Closest named color: Rich Black (#0D1B2A). oklch(21.2% 0.045 288), rgb(24, 21, 44).
Aa
White text reads best on this color (17.75:1).
About this color
#18152C is a very dark, muted purple. In OKLCH its lightness is 21%, its chroma 0.045 and its hue 288°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.027 away. White text reads best on it, at 17.75:1.
| Hue family | Purples |
| Lightness | very dark (21%) |
| Chroma | muted (0.045) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.18:1 |
| White text | 17.75:1 |
Values
| HEX | #18152C |
| RGB | rgb(24, 21, 44) |
| HSL | hsl(248, 35%, 13%) |
| OKLCH | oklch(21.2% 0.045 288) |
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 #18152C | 17.75:1 | AAA | Lc -106.7 | Preferred for body text |
| Black text on #18152C | 1.18:1 | Fails | Lc 0.0 | Not readable |
| #18152C text on white | 17.75:1 | AAA | Lc 104.5 | Preferred for body text |
| #18152C text on black | 1.18:1 | 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
#F5F5FA
oklch(97.2% 0.007 286.3)
-
Step 100
100
#E9E8F4
oklch(93.5% 0.016 289.9)
-
Step 200
200
#D8D7EC
oklch(88.6% 0.029 288)
-
Step 300
300
#BEBCE2
oklch(80.9% 0.053 287.6)
-
Step 400
400
#9E98D3
oklch(70.7% 0.086 288.7)
-
Step 500
500
#867EC7
oklch(63% 0.108 287.9)
-
Step 600
600
#7167B4
oklch(55.7% 0.117 287.9)
-
Step 700
700
#5E559B
oklch(49.1% 0.11 287.5)
-
Step 800
800
#4D467D
oklch(42.7% 0.089 287.8)
-
Step 900
900
#403B65
oklch(37.7% 0.071 288)
-
Step 950
950 (this color)
#18152C
oklch(21.2% 0.045 288)
#18152C 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) | #0D192D | 0.021 |
| Deuteranopia (no green cones) | #0D172B | 0.020 |
| Tritanopia (no blue cones) | #13191E | 0.036 |
| Achromatopsia (no color) | #181818 | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18152C
#18152C
oklch(21.2% 0.045 288)
- #1B1A01
#1B1A01
oklch(21.2% 0.044 107.6)
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 #18152C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.027
- Dark #1B2431 ΔE 0.052
- Oxford Blue #1B263B ΔE 0.060
- Rich Navy #001219 ΔE 0.061
- Jet #212529 ΔE 0.062
- Midnight Purple #280137 ΔE 0.064
- Very Dark Purple #2A0134 ΔE 0.065
- Navy Blue #001146 ΔE 0.065
Use #18152C 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.