#180F33
Closest named color: Midnight Purple (#280137). oklch(20.4% 0.068 290.6), rgb(24, 15, 51).
Aa
White text reads best on this color (18.18:1).
About this color
#180F33 is a very dark, muted purple. In OKLCH its lightness is 20%, its chroma 0.068 and its hue 291°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Midnight Purple (#280137), ΔE 0.047 away. White text reads best on it, at 18.18:1.
| Hue family | Purples |
| Lightness | very dark (20%) |
| Chroma | muted (0.068) |
| Temperature | in between |
| Nearest name | Midnight Purple (#280137) |
| Black text | 1.15:1 |
| White text | 18.18:1 |
Values
| HEX | #180F33 |
| RGB | rgb(24, 15, 51) |
| HSL | hsl(255, 55%, 13%) |
| OKLCH | oklch(20.4% 0.068 290.6) |
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 #180F33 | 18.18:1 | AAA | Lc -106.9 | Preferred for body text |
| Black text on #180F33 | 1.15:1 | Fails | Lc 0.0 | Not readable |
| #180F33 text on white | 18.18:1 | AAA | Lc 104.7 | Preferred for body text |
| #180F33 text on black | 1.15:1 | 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
#F5F4FC
oklch(97% 0.011 292)
-
Step 100
100
#E9E8F9
oklch(93.7% 0.023 288.7)
-
Step 200
200
#D8D5F5
oklch(88.5% 0.044 289.8)
-
Step 300
300
#C0B8F1
oklch(80.9% 0.08 290.9)
-
Step 400
400
#A191EB
oklch(70.7% 0.13 290.9)
-
Step 500
500
#8B73E4
oklch(63% 0.165 290.7)
-
Step 600
600
#7659D2
oklch(55.6% 0.179 290.4)
-
Step 700
700
#6448B6
oklch(49.1% 0.166 290.7)
-
Step 800
800
#513C93
oklch(42.7% 0.137 290.5)
-
Step 900
900
#433475
oklch(37.7% 0.107 291)
-
Step 950
950 (this color)
#180F33
oklch(20.4% 0.068 290.6)
#180F33 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) | #001634 | 0.041 |
| Deuteranopia (no green cones) | #001532 | 0.041 |
| Tritanopia (no blue cones) | #10171F | 0.054 |
| Achromatopsia (no color) | #151515 | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #180F33
#180F33
oklch(20.4% 0.068 290.6)
- #181900
#181900
oklch(20.5% 0.045 111.8)
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 #180F33, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Purple #280137 ΔE 0.047
- Rich Black #0D1B2A ΔE 0.048
- Very Dark Purple #2A0134 ΔE 0.051
- Navy Blue #001146 ΔE 0.053
- Dark Indigo #1F0954 ΔE 0.064
- Dark Navy #000435 ΔE 0.064
- Night Blue #040348 ΔE 0.064
- Dark Purple #35063E ΔE 0.070
Use #180F33 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.