#2A1B43
Closest named color: Oxford Blue (#1B263B). oklch(26.4% 0.073 298.6), rgb(42, 27, 67).
Aa
White text reads best on this color (15.71:1).
About this color
#2A1B43 is a dark, moderately saturated purple. In OKLCH its lightness is 26%, its chroma 0.073 and its hue 299°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.046 away. White text reads best on it, at 15.71:1.
| Hue family | Purples |
| Lightness | dark (26%) |
| Chroma | moderately saturated (0.073) |
| Temperature | in between |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.33:1 |
| White text | 15.71:1 |
Values
| HEX | #2A1B43 |
| RGB | rgb(42, 27, 67) |
| HSL | hsl(263, 43%, 18%) |
| OKLCH | oklch(26.4% 0.073 298.6) |
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 #2A1B43 | 15.71:1 | AAA | Lc -105.2 | Preferred for body text |
| Black text on #2A1B43 | 1.33:1 | Fails | Lc 0.0 | Not readable |
| #2A1B43 text on white | 15.71:1 | AAA | Lc 102.5 | Preferred for body text |
| #2A1B43 text on black | 1.33:1 | 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
#F6F4FC
oklch(97.1% 0.011 297.6)
-
Step 100
100
#ECE7F9
oklch(93.7% 0.025 298.6)
-
Step 200
200
#DDD3F5
oklch(88.5% 0.047 298.9)
-
Step 300
300
#C8B5F2
oklch(81% 0.087 298.7)
-
Step 400
400
#AC8CEB
oklch(70.7% 0.139 298.3)
-
Step 500
500
#996CE4
oklch(63.1% 0.176 298.5)
-
Step 600
600
#8550D2
oklch(55.7% 0.192 298.8)
-
Step 700
700
#703FB6
oklch(49% 0.179 298.4)
-
Step 800
800
#5B3593
oklch(42.6% 0.148 298.5)
-
Step 900
900
#4B3075
oklch(37.8% 0.114 298.9)
-
Step 950
950 (this color)
#2A1B43
oklch(26.4% 0.073 298.6)
#2A1B43 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) | #0C2344 | 0.050 |
| Deuteranopia (no green cones) | #102342 | 0.047 |
| Tritanopia (no blue cones) | #25232C | 0.056 |
| Achromatopsia (no color) | #232323 | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A1B43
#2A1B43
oklch(26.4% 0.073 298.6)
- #222900
#222900
oklch(26.5% 0.062 119.1)
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 #2A1B43, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.046
- Dark Purple #35063E ΔE 0.050
- Eggplant #380835 ΔE 0.054
- Dark #1B2431 ΔE 0.056
- Space Cadet #2B2D42 ΔE 0.057
- Deep Purple #36013F ΔE 0.058
- Dark Indigo #1F0954 ΔE 0.058
- Aubergine #3D0734 ΔE 0.061
Use #2A1B43 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.