#18102C
Closest named color: Rich Black (#0D1B2A). oklch(20.1% 0.054 294.1), rgb(24, 16, 44).
Aa
White text reads best on this color (18.27:1).
About this color
#18102C is a very dark, muted purple. In OKLCH its lightness is 20%, its chroma 0.054 and its hue 294°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.041 away. White text reads best on it, at 18.27:1.
| Hue family | Purples |
| Lightness | very dark (20%) |
| Chroma | muted (0.054) |
| Temperature | in between |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.14:1 |
| White text | 18.27:1 |
Values
| HEX | #18102C |
| RGB | rgb(24, 16, 44) |
| HSL | hsl(257, 47%, 12%) |
| OKLCH | oklch(20.1% 0.054 294.1) |
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 #18102C | 18.27:1 | AAA | Lc -107.0 | Preferred for body text |
| Black text on #18102C | 1.14:1 | Fails | Lc 0.0 | Not readable |
| #18102C text on white | 18.27:1 | AAA | Lc 104.8 | Preferred for body text |
| #18102C text on black | 1.14:1 | 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
#F5F4FB
oklch(97% 0.009 292.8)
-
Step 100
100
#EAE8F5
oklch(93.6% 0.018 293.1)
-
Step 200
200
#DAD5EF
oklch(88.5% 0.036 294.5)
-
Step 300
300
#C2B9E7
oklch(80.8% 0.065 293.9)
-
Step 400
400
#A494DB
oklch(70.7% 0.103 293.9)
-
Step 500
500
#8F78D1
oklch(63.2% 0.132 294.2)
-
Step 600
600
#795FBE
oklch(55.6% 0.144 293.8)
-
Step 700
700
#664EA4
oklch(49.1% 0.134 293.8)
-
Step 800
800
#534085
oklch(42.6% 0.111 293.8)
-
Step 900
900
#45376A
oklch(37.7% 0.086 294.6)
-
Step 950
950 (this color)
#18102C
oklch(20.1% 0.054 294.1)
#18102C 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) | #06152D | 0.033 |
| Deuteranopia (no green cones) | #07142B | 0.031 |
| Tritanopia (no blue cones) | #13161B | 0.046 |
| Achromatopsia (no color) | #151515 | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18102C
#18102C
oklch(20.1% 0.054 294.1)
- #161800
#161800
oklch(20% 0.045 113.8)
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 #18102C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.041
- Midnight Purple #280137 ΔE 0.054
- Very Dark Purple #2A0134 ΔE 0.055
- Rich Navy #001219 ΔE 0.062
- Navy Blue #001146 ΔE 0.063
- Dark #1B2431 ΔE 0.068
- Dark Navy #000435 ΔE 0.069
- Midnight #03012D ΔE 0.073
Use #18102C 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.