#1B1433
Closest named color: Rich Black (#0D1B2A). oklch(21.9% 0.059 291.1), rgb(27, 20, 51).
Aa
White text reads best on this color (17.58:1).
About this color
#1B1433 is a very dark, muted purple. In OKLCH its lightness is 22%, its chroma 0.059 and its hue 291°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.039 away. White text reads best on it, at 17.58:1.
| Hue family | Purples |
| Lightness | very dark (22%) |
| Chroma | muted (0.059) |
| Temperature | in between |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.19:1 |
| White text | 17.58:1 |
Values
| HEX | #1B1433 |
| RGB | rgb(27, 20, 51) |
| HSL | hsl(254, 44%, 14%) |
| OKLCH | oklch(21.9% 0.059 291.1) |
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 #1B1433 | 17.58:1 | AAA | Lc -106.6 | Preferred for body text |
| Black text on #1B1433 | 1.19:1 | Fails | Lc 0.0 | Not readable |
| #1B1433 text on white | 17.58:1 | AAA | Lc 104.3 | Preferred for body text |
| #1B1433 text on black | 1.19:1 | 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
#E9E8F7
oklch(93.6% 0.02 289.1)
-
Step 200
200
#D9D5F1
oklch(88.5% 0.038 292.2)
-
Step 300
300
#C0B9EB
oklch(80.8% 0.07 291.2)
-
Step 400
400
#A194E1
oklch(70.8% 0.111 291)
-
Step 500
500
#8B77D8
oklch(63% 0.143 291.2)
-
Step 600
600
#765EC5
oklch(55.6% 0.154 291.3)
-
Step 700
700
#634DAB
oklch(49.1% 0.145 290.9)
-
Step 800
800
#51408A
oklch(42.8% 0.118 291.1)
-
Step 900
900
#43376E
oklch(37.8% 0.092 291.4)
-
Step 950
950 (this color)
#1B1433
oklch(21.9% 0.059 291.1)
#1B1433 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) | #071A34 | 0.034 |
| Deuteranopia (no green cones) | #081832 | 0.032 |
| Tritanopia (no blue cones) | #151A21 | 0.047 |
| Achromatopsia (no color) | #191919 | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B1433
#1B1433
oklch(21.9% 0.059 291.1)
- #1B1C00
#1B1C00
oklch(21.8% 0.048 111.6)
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 #1B1433, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.039
- Midnight Purple #280137 ΔE 0.053
- Very Dark Purple #2A0134 ΔE 0.055
- Dark #1B2431 ΔE 0.055
- Navy Blue #001146 ΔE 0.058
- Oxford Blue #1B263B ΔE 0.058
- Dark Purple #35063E ΔE 0.066
- Dark Indigo #1F0954 ΔE 0.066
Use #1B1433 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.