#1D1B41
Closest named color: Oxford Blue (#1B263B). oklch(24.8% 0.07 282.4), rgb(29, 27, 65).
Aa
White text reads best on this color (16.33:1).
About this color
#1D1B41 is a very dark, muted purple. In OKLCH its lightness is 25%, its chroma 0.070 and its hue 282°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.039 away. White text reads best on it, at 16.33:1.
| Hue family | Purples |
| Lightness | very dark (25%) |
| Chroma | muted (0.070) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.28:1 |
| White text | 16.33:1 |
Values
| HEX | #1D1B41 |
| RGB | rgb(29, 27, 65) |
| HSL | hsl(243, 41%, 18%) |
| OKLCH | oklch(24.8% 0.07 282.4) |
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 #1D1B41 | 16.33:1 | AAA | Lc -105.7 | Preferred for body text |
| Black text on #1D1B41 | 1.28:1 | Fails | Lc 0.0 | Not readable |
| #1D1B41 text on white | 16.33:1 | AAA | Lc 103.2 | Preferred for body text |
| #1D1B41 text on black | 1.28:1 | 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
#F4F5FD
oklch(97.2% 0.011 280.5)
-
Step 100
100
#E7E8FA
oklch(93.6% 0.024 283.4)
-
Step 200
200
#D4D6F8
oklch(88.5% 0.047 282.7)
-
Step 300
300
#B8BAF5
oklch(80.8% 0.083 282.9)
-
Step 400
400
#9595F0
oklch(70.7% 0.132 282.5)
-
Step 500
500
#7D78EB
oklch(63.2% 0.168 282.4)
-
Step 600
600
#685DDA
oklch(55.6% 0.185 282.6)
-
Step 700
700
#574CBD
oklch(49.2% 0.171 282.5)
-
Step 800
800
#473F99
oklch(42.8% 0.142 282.6)
-
Step 900
900
#3B3779
oklch(37.8% 0.109 282.6)
-
Step 950
950 (this color)
#1D1B41
oklch(24.8% 0.07 282.4)
#1D1B41 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) | #082142 | 0.031 |
| Deuteranopia (no green cones) | #061E40 | 0.032 |
| Tritanopia (no blue cones) | #10232B | 0.059 |
| Achromatopsia (no color) | #202020 | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D1B41
#1D1B41
oklch(24.8% 0.07 282.4)
- #262200
#262200
oklch(24.9% 0.052 103)
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 #1D1B41, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.039
- Dark #1B2431 ΔE 0.047
- Rich Black #0D1B2A ΔE 0.053
- Dark Indigo #1F0954 ΔE 0.053
- Navy Blue #001146 ΔE 0.057
- Jet #212529 ΔE 0.064
- Space Cadet #2B2D42 ΔE 0.065
- Dark Purple #35063E ΔE 0.066
Use #1D1B41 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.