#1D1B44
Closest named color: Oxford Blue (#1B263B). oklch(25% 0.075 281.7), rgb(29, 27, 68).
Aa
White text reads best on this color (16.24:1).
About this color
#1D1B44 is a dark, moderately saturated purple. In OKLCH its lightness is 25%, its chroma 0.075 and its hue 282°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.042 away. White text reads best on it, at 16.24:1.
| Hue family | Purples |
| Lightness | dark (25%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.29:1 |
| White text | 16.24:1 |
Values
| HEX | #1D1B44 |
| RGB | rgb(29, 27, 68) |
| HSL | hsl(243, 43%, 19%) |
| OKLCH | oklch(25% 0.075 281.7) |
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 #1D1B44 | 16.24:1 | AAA | Lc -105.6 | Preferred for body text |
| Black text on #1D1B44 | 1.29:1 | Fails | Lc 0.0 | Not readable |
| #1D1B44 text on white | 16.24:1 | AAA | Lc 103.1 | Preferred for body text |
| #1D1B44 text on black | 1.29:1 | 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
#F4F5FE
oklch(97.2% 0.012 281.1)
-
Step 100
100
#E6E8FB
oklch(93.5% 0.026 281.1)
-
Step 200
200
#D3D6FA
oklch(88.5% 0.05 281.6)
-
Step 300
300
#B7BAF9
oklch(80.9% 0.089 282.1)
-
Step 400
400
#9394F6
oklch(70.7% 0.142 281.7)
-
Step 500
500
#7B76F2
oklch(63.1% 0.18 281.7)
-
Step 600
600
#665BE1
oklch(55.7% 0.197 281.6)
-
Step 700
700
#5549C3
oklch(49% 0.183 281.7)
-
Step 800
800
#453D9E
oklch(42.7% 0.152 281.5)
-
Step 900
900
#3A357D
oklch(37.6% 0.118 282.2)
-
Step 950
950 (this color)
#1D1B44
oklch(25% 0.075 281.7)
#1D1B44 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) | #052245 | 0.034 |
| Deuteranopia (no green cones) | #031F43 | 0.034 |
| Tritanopia (no blue cones) | #0E242C | 0.064 |
| Achromatopsia (no color) | #202020 | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D1B44
#1D1B44
oklch(25% 0.075 281.7)
- #272200
#272200
oklch(25% 0.052 101.3)
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 #1D1B44, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.042
- Dark Indigo #1F0954 ΔE 0.049
- Dark #1B2431 ΔE 0.051
- Navy Blue #001146 ΔE 0.056
- Rich Black #0D1B2A ΔE 0.058
- Space Cadet #2B2D42 ΔE 0.066
- Dark Purple #35063E ΔE 0.066
- Jet #212529 ΔE 0.068
Use #1D1B44 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.