#1B143E
Closest named color: Dark Indigo (#1F0954). oklch(22.8% 0.077 286.2), rgb(27, 20, 62).
Aa
White text reads best on this color (17.26:1).
About this color
#1B143E is a very dark, moderately saturated purple. In OKLCH its lightness is 23%, its chroma 0.077 and its hue 286°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Indigo (#1F0954), ΔE 0.046 away. White text reads best on it, at 17.26:1.
| Hue family | Purples |
| Lightness | very dark (23%) |
| Chroma | moderately saturated (0.077) |
| Temperature | cool |
| Nearest name | Dark Indigo (#1F0954) |
| Black text | 1.21:1 |
| White text | 17.26:1 |
Values
| HEX | #1B143E |
| RGB | rgb(27, 20, 62) |
| HSL | hsl(250, 51%, 16%) |
| OKLCH | oklch(22.8% 0.077 286.2) |
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 #1B143E | 17.26:1 | AAA | Lc -106.3 | Preferred for body text |
| Black text on #1B143E | 1.21:1 | Fails | Lc 0.0 | Not readable |
| #1B143E text on white | 17.26:1 | AAA | Lc 104.0 | Preferred for body text |
| #1B143E text on black | 1.21:1 | 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
#F4F4FE
oklch(97% 0.013 286.1)
-
Step 100
100
#E8E8FB
oklch(93.7% 0.026 285.9)
-
Step 200
200
#D6D5FA
oklch(88.6% 0.051 286.6)
-
Step 300
300
#BBB8F9
oklch(80.8% 0.091 286.3)
-
Step 400
400
#9A91F6
oklch(70.7% 0.145 286.1)
-
Step 500
500
#8472F3
oklch(63.2% 0.186 286.2)
-
Step 600
600
#6F56E1
oklch(55.6% 0.202 286.1)
-
Step 700
700
#5E45C4
oklch(49.2% 0.188 286.3)
-
Step 800
800
#4C3A9E
oklch(42.7% 0.155 286.1)
-
Step 900
900
#3F337E
oklch(37.8% 0.122 286.3)
-
Step 950
950 (this color)
#1B143E
oklch(22.8% 0.077 286.2)
#1B143E 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) | #001C3F | 0.041 |
| Deuteranopia (no green cones) | #001A3D | 0.040 |
| Tritanopia (no blue cones) | #0F1E26 | 0.065 |
| Achromatopsia (no color) | #1B1B1B | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B143E
#1B143E
oklch(22.8% 0.077 286.2)
- #201E00
#201E00
oklch(23% 0.049 106.1)
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 #1B143E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Indigo #1F0954 ΔE 0.046
- Navy Blue #001146 ΔE 0.048
- Midnight Purple #280137 ΔE 0.052
- Rich Black #0D1B2A ΔE 0.053
- Very Dark Purple #2A0134 ΔE 0.056
- Oxford Blue #1B263B ΔE 0.059
- Dark #1B2431 ΔE 0.062
- Dark Purple #35063E ΔE 0.062
Use #1B143E 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.