#1B1746
Closest named color: Dark Indigo (#1F0954). oklch(24.2% 0.085 281.8), rgb(27, 23, 70).
Aa
White text reads best on this color (16.69:1).
About this color
#1B1746 is a very dark, moderately saturated purple. In OKLCH its lightness is 24%, its chroma 0.085 and its hue 282°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Indigo (#1F0954), ΔE 0.038 away. White text reads best on it, at 16.69:1.
| Hue family | Purples |
| Lightness | very dark (24%) |
| Chroma | moderately saturated (0.085) |
| Temperature | cool |
| Nearest name | Dark Indigo (#1F0954) |
| Black text | 1.25:1 |
| White text | 16.69:1 |
Values
| HEX | #1B1746 |
| RGB | rgb(27, 23, 70) |
| HSL | hsl(245, 51%, 18%) |
| OKLCH | oklch(24.2% 0.085 281.8) |
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 #1B1746 | 16.69:1 | AAA | Lc -105.9 | Preferred for body text |
| Black text on #1B1746 | 1.25:1 | Fails | Lc 0.0 | Not readable |
| #1B1746 text on white | 16.69:1 | AAA | Lc 103.4 | Preferred for body text |
| #1B1746 text on black | 1.25:1 | 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
#F4F5FF
oklch(97.2% 0.013 281.6)
-
Step 100
100
#E6E8FE
oklch(93.6% 0.03 281.7)
-
Step 200
200
#D2D5FE
oklch(88.4% 0.056 281.9)
-
Step 300
300
#B6B9FF
oklch(80.9% 0.099 282.1)
-
Step 400
400
#9292FF
oklch(70.8% 0.157 281.6)
-
Step 500
500
#7A71FF
oklch(63.1% 0.204 281.7)
-
Step 600
600
#6653EF
oklch(55.5% 0.224 281.8)
-
Step 700
700
#5642D0
oklch(49.1% 0.208 282)
-
Step 800
800
#4638A8
oklch(42.7% 0.172 282)
-
Step 900
900
#393285
oklch(37.6% 0.134 281.6)
-
Step 950
950 (this color)
#1B1746
oklch(24.2% 0.085 281.8)
#1B1746 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) | #001F48 | 0.038 |
| Deuteranopia (no green cones) | #001C45 | 0.036 |
| Tritanopia (no blue cones) | #07222B | 0.073 |
| Achromatopsia (no color) | #1E1E1E | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B1746
#1B1746
oklch(24.2% 0.085 281.8)
- #252000
#252000
oklch(24.2% 0.05 100.9)
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 #1B1746, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Indigo #1F0954 ΔE 0.038
- Navy Blue #001146 ΔE 0.047
- Oxford Blue #1B263B ΔE 0.054
- Rich Black #0D1B2A ΔE 0.062
- Dark #1B2431 ΔE 0.063
- Midnight Purple #280137 ΔE 0.063
- Dark Purple #35063E ΔE 0.066
- Night Blue #040348 ΔE 0.067
Use #1B1746 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.