#181635
Closest named color: Rich Black (#0D1B2A). oklch(22.2% 0.059 283.4), rgb(24, 22, 53).
Aa
White text reads best on this color (17.42:1).
About this color
#181635 is a very dark, muted purple. In OKLCH its lightness is 22%, its chroma 0.059 and its hue 283°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.035 away. White text reads best on it, at 17.42:1.
| Hue family | Purples |
| Lightness | very dark (22%) |
| Chroma | muted (0.059) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.20:1 |
| White text | 17.42:1 |
Values
| HEX | #181635 |
| RGB | rgb(24, 22, 53) |
| HSL | hsl(244, 41%, 15%) |
| OKLCH | oklch(22.2% 0.059 283.4) |
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 #181635 | 17.42:1 | AAA | Lc -106.5 | Preferred for body text |
| Black text on #181635 | 1.20:1 | Fails | Lc 0.0 | Not readable |
| #181635 text on white | 17.42:1 | AAA | Lc 104.2 | Preferred for body text |
| #181635 text on black | 1.20:1 | 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
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E8E8F7
oklch(93.5% 0.02 286)
-
Step 200
200
#D5D6F3
oklch(88.4% 0.04 284)
-
Step 300
300
#BABBED
oklch(80.8% 0.07 283.8)
-
Step 400
400
#9797E4
oklch(70.7% 0.112 283.2)
-
Step 500
500
#7F7BDC
oklch(63% 0.143 283.4)
-
Step 600
600
#6A62C9
oklch(55.5% 0.155 283.7)
-
Step 700
700
#5851AE
oklch(49.1% 0.144 283.1)
-
Step 800
800
#48438D
oklch(42.7% 0.119 283.2)
-
Step 900
900
#3C3971
oklch(37.7% 0.093 283.4)
-
Step 950
950 (this color)
#181635
oklch(22.2% 0.059 283.4)
#181635 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) | #081B36 | 0.026 |
| Deuteranopia (no green cones) | #071934 | 0.026 |
| Tritanopia (no blue cones) | #0E1D23 | 0.050 |
| Achromatopsia (no color) | #1A1A1A | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #181635
#181635
oklch(22.2% 0.059 283.4)
- #1F1C00
#1F1C00
oklch(22.3% 0.047 104)
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 #181635, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.035
- Dark #1B2431 ΔE 0.051
- Navy Blue #001146 ΔE 0.053
- Oxford Blue #1B263B ΔE 0.053
- Midnight Purple #280137 ΔE 0.060
- Very Dark Purple #2A0134 ΔE 0.062
- Dark Indigo #1F0954 ΔE 0.065
- Jet #212529 ΔE 0.065
Use #181635 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.