#181338
Closest named color: Rich Black (#0D1B2A). oklch(21.7% 0.069 285.2), rgb(24, 19, 56).
Aa
White text reads best on this color (17.66:1).
About this color
#181338 is a very dark, muted purple. In OKLCH its lightness is 22%, its chroma 0.069 and its hue 285°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.044 away. White text reads best on it, at 17.66:1.
| Hue family | Purples |
| Lightness | very dark (22%) |
| Chroma | muted (0.069) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.18:1 |
| White text | 17.66:1 |
Values
| HEX | #181338 |
| RGB | rgb(24, 19, 56) |
| HSL | hsl(248, 49%, 15%) |
| OKLCH | oklch(21.7% 0.069 285.2) |
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 #181338 | 17.66:1 | AAA | Lc -106.6 | Preferred for body text |
| Black text on #181338 | 1.18:1 | Fails | Lc 0.0 | Not readable |
| #181338 text on white | 17.66:1 | AAA | Lc 104.3 | Preferred for body text |
| #181338 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
#F4F5FD
oklch(97.2% 0.011 280.5)
-
Step 100
100
#E8E8FA
oklch(93.6% 0.024 285.9)
-
Step 200
200
#D5D6F7
oklch(88.6% 0.045 284.1)
-
Step 300
300
#BBBAF4
oklch(81% 0.081 285.2)
-
Step 400
400
#9994EF
oklch(70.8% 0.131 285)
-
Step 500
500
#8276E9
oklch(63.1% 0.168 285.3)
-
Step 600
600
#6D5CD7
oklch(55.7% 0.181 285.2)
-
Step 700
700
#5B4ABB
oklch(49% 0.171 285.1)
-
Step 800
800
#4A3E97
oklch(42.7% 0.14 284.9)
-
Step 900
900
#3E3678
oklch(37.8% 0.109 285.5)
-
Step 950
950 (this color)
#181338
oklch(21.7% 0.069 285.2)
#181338 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) | #001A39 | 0.038 |
| Deuteranopia (no green cones) | #001737 | 0.037 |
| Tritanopia (no blue cones) | #0D1B23 | 0.057 |
| Achromatopsia (no color) | #191919 | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #181338
#181338
oklch(21.7% 0.069 285.2)
- #1D1B00
#1D1B00
oklch(21.7% 0.046 105.9)
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 #181338, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.044
- Navy Blue #001146 ΔE 0.047
- Midnight Purple #280137 ΔE 0.053
- Very Dark Purple #2A0134 ΔE 0.057
- Dark Indigo #1F0954 ΔE 0.057
- Dark #1B2431 ΔE 0.062
- Oxford Blue #1B263B ΔE 0.062
- Night Blue #040348 ΔE 0.063
Use #181338 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.