#180C33
Closest named color: Midnight Purple (#280137). oklch(19.9% 0.073 292.7), rgb(24, 12, 51).
Aa
White text reads best on this color (18.43:1).
About this color
#180C33 is a very dark, moderately saturated purple. In OKLCH its lightness is 20%, its chroma 0.073 and its hue 293°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Midnight Purple (#280137), ΔE 0.044 away. White text reads best on it, at 18.43:1.
| Hue family | Purples |
| Lightness | very dark (20%) |
| Chroma | moderately saturated (0.073) |
| Temperature | in between |
| Nearest name | Midnight Purple (#280137) |
| Black text | 1.13:1 |
| White text | 18.43:1 |
Values
| HEX | #180C33 |
| RGB | rgb(24, 12, 51) |
| HSL | hsl(258, 62%, 12%) |
| OKLCH | oklch(19.9% 0.073 292.7) |
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 #180C33 | 18.43:1 | AAA | Lc -107.0 | Preferred for body text |
| Black text on #180C33 | 1.13:1 | Fails | Lc 0.0 | Not readable |
| #180C33 text on white | 18.43:1 | AAA | Lc 104.9 | Preferred for body text |
| #180C33 text on black | 1.13:1 | 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
#EAE7FA
oklch(93.6% 0.026 293.1)
-
Step 200
200
#D9D4F7
oklch(88.5% 0.048 291.9)
-
Step 300
300
#C2B7F4
oklch(81% 0.086 292.6)
-
Step 400
400
#A48FEF
oklch(70.8% 0.138 292.6)
-
Step 500
500
#8F6FE9
oklch(63% 0.177 292.7)
-
Step 600
600
#7B54D7
oklch(55.6% 0.192 292.8)
-
Step 700
700
#6843BB
oklch(49.1% 0.179 292.8)
-
Step 800
800
#543897
oklch(42.6% 0.148 292.6)
-
Step 900
900
#453278
oklch(37.7% 0.115 292.5)
-
Step 950
950 (this color)
#180C33
oklch(19.9% 0.073 292.7)
#180C33 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) | #001434 | 0.044 |
| Deuteranopia (no green cones) | #001332 | 0.044 |
| Tritanopia (no blue cones) | #10151E | 0.057 |
| Achromatopsia (no color) | #141414 | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #180C33
#180C33
oklch(19.9% 0.073 292.7)
- #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 #180C33, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Purple #280137 ΔE 0.044
- Very Dark Purple #2A0134 ΔE 0.048
- Navy Blue #001146 ΔE 0.055
- Rich Black #0D1B2A ΔE 0.055
- Dark Navy #000435 ΔE 0.061
- Night Blue #040348 ΔE 0.062
- Dark Indigo #1F0954 ΔE 0.064
- Midnight #03012D ΔE 0.066
Use #180C33 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.